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Journal articles on the topic 'Single beta decay'

Author: Grafiati

Published: 9 March 2023

Last updated: 31 July 2025

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1

Díaz, Jorge S. "Tests of Lorentz Symmetry in Single Beta Decay." Advances in High Energy Physics 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/305298.

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Low-energy experiments studying single beta decay can serve as sensitive probes of Lorentz invariance that can complement interferometric searches for deviations from this spacetime symmetry. Experimental signatures of a dimension-three operator for Lorentz violation which are unobservable in neutrino oscillations are described for the decay of polarized and unpolarized neutrons as well as for measurements of the spectral endpoint in beta decay.

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2

Krmpotić, F., J. Hirsch, and H. Dias. "Double-beta decay within a single-mode model." Nuclear Physics A 542, no. 1 (1992): 85–96. http://dx.doi.org/10.1016/0375-9474(92)90398-4.

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3

MATSUDA, KOICHI, TATSURU KIKUCHI, TAKESHI FUKUYAMA, and HIROYUKI NISHIURA. "CONSTRAINTS FROM NEUTRINOLESS DOUBLE BETA DECAY." Modern Physics Letters A 17, no. 39 (2002): 2597–603. http://dx.doi.org/10.1142/s0217732302009362.

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We examine the constraints from the recent HEIDELBERG–MOSCOW double beta decay experiment. It leads us to the almost degenerate or inverse hierarchy neutrino mass scenario. In this scenario, we obtain possible upper bounds for the Majorana CP violating phase in the lepton sector by incorporating the data from the neutrino oscillation, the single beta decay experiments, and from the astrophysical observation. We also predict the neutrino mass that may be measurable in the future beta decay experiments.

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4

Kohyama, Y., K. Kubodera, and K. Yazaki. "Comment on neutrinoless double-beta decay between pairs of single-beta emitters." Physics Letters B 168, no. 1-2 (1986): 21–25. http://dx.doi.org/10.1016/0370-2693(86)91452-8.

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5

Borzov, I. N. "Evolution of single-particle structure and beta-decay near78Ni." EPJ Web of Conferences 38 (2012): 12002. http://dx.doi.org/10.1051/epjconf/20123812002.

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6

Skalsey, M. "Feasibility of detecting neutrinoless double-beta decay between pairs of single-beta emitters." Physical Review C 36, no. 2 (1987): 820–21. http://dx.doi.org/10.1103/physrevc.36.820.

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7

Severyukhin, A. P., N. N. Arsenyev, I. N. Borzov, R. G. Nazmitdinov, and S. Åberg. "Two-phonon structures for beta-decay theory." EPJ Web of Conferences 194 (2018): 02008. http://dx.doi.org/10.1051/epjconf/201819402008.

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The β-decay rates of 60Ca have been studied within a microscopic model, which is based on the Skyrme interaction T45 to construct single-particle and phonon spaces. We observe a redistribution of the Gamow–Teller strength due to the phonon-phonon coupling, considered in the model. For 60Sc, the spin-parity of the ground state is found to be 1+. We predict that the half-life of 60Ca is 0.3 ms, while the total probability of the βxn emission is 6:1%. Additionally, the random matrix theory has been applied to analyze the statistical properties of the 1+ spectrum populated in the β-decay to elucid

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8

Kohyama, Y., K. Kubodera, and M. Takizawa. "Comment on ‘‘Feasibility of detecting neutrinoless double-beta decay between pairs of single-beta emitters’’." Physical Review C 37, no. 4 (1988): 1778–79. http://dx.doi.org/10.1103/physrevc.37.1778.

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9

Ciraldo, Irene, F. Cappuzzello, M. Cavallaro, et al. "Study of the one-neutron transfer reaction in ¹⁸O + ⁷⁶Se collision at 275 MeV in the context of the NUMEN project." Journal of Physics: Conference Series 2453, no. 1 (2023): 012013. http://dx.doi.org/10.1088/1742-6596/2453/1/012013.

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Abstract Heavy-ion one-nucleon transfer reactions are promising tools to investigate single-particle configurations in nuclear states, with and without the excitation of the core degrees of freedom. An accurate determination of the spectroscopic amplitudes of these configurations is essential for the study of other direct reactions as well as beta-decays. In this context, the 76Se(18O,17O)77Se one-neutron transfer reaction gives a quantitative access to the relevant single particle orbitals and core polarization transitions built on 76Se. This is particularly relevant, since it provides data-d

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10

Auerbach, Naftali, and Minh-Loc Bui. "Study of the double Gamow-Teller transitions using the shell model approach." EPJ Web of Conferences 194 (2018): 02003. http://dx.doi.org/10.1051/epjconf/201819402003.

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The double Gamow-Teller strength distributions in the lightest double beta-decay candidate 48Ca and its isotope 46Ca were calculated using the nuclear shell model by applying the single Gamow-Teller operator two times sequentially on the ground state of parent nucleus. The nuclear matrix element of the double Gamow- Teller transition from the ground state to the ground state that goes into the double beta decay calculation was shown as a small fraction of the total transition.

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11

Lenske, Horst. "Heavy Ion Charge Exchange Reactions as Probes for Beta–Decay." EPJ Web of Conferences 223 (2019): 01031. http://dx.doi.org/10.1051/epjconf/201922301031.

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Peripheral heavy ion single and double charge reactions are described by fully quantum mechanical distorted wave methods. A special class of nuclear double charge exchange (DCE) reactions proceeding as a one-step reaction through a two-body process are shown to proceed by nuclear matrix elements of a diagrammatic structure as found also in 0ν2ß decay. These hadronic Majorana-type DCE reactions (MDCE) have to be distinguished from second order DCE reactions, given by double single charge exchange (DSCE) processes, resembling 2ν2ß decay. The theoretical concepts of MDCE are discussed. First resu

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12

Khatun, Amina, Adam Smetana, and Fedor Šimkovic. "Three Flavor Quasi-Dirac Neutrino Mixing, Oscillations and Neutrinoless Double Beta Decay." Symmetry 12, no. 8 (2020): 1310. http://dx.doi.org/10.3390/sym12081310.

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The extension of the Standard model by three right-handed neutrino fields exhibit appealing symmetry between left-handed and right-handed sectors, which is only violated by interactions. It can accommodate three flavor quasi-Dirac neutrino mixing scheme, which allows processes with violation of both lepton flavor and total lepton number symmetries. We propose a 6×6 unitary matrix for parameterizing the mixing among three flavors of quasi-Dirac neutrino. This mixing matrix is constructed by two 3×3 unitary matrices that diagonalizes the Dirac mass term in the Lagrangian. By only assuming the St

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13

Moreno, O., R. Álvarez-Rodríguez, P. Sarriguren, E. Moya de Guerra, F. Šimkovic, and A. Faessler. "Single- and low-lying-states dominance in two-neutrino double-beta decay." Journal of Physics G: Nuclear and Particle Physics 36, no. 1 (2008): 015106. http://dx.doi.org/10.1088/0954-3899/36/1/015106.

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14

Hirsch, Jorge G., Peter O. Hess, and Osvaldo Civitarese. "Single- and double-beta decay Fermi transitions in an exactly solvable model." Physical Review C 56, no. 1 (1997): 199–211. http://dx.doi.org/10.1103/physrevc.56.199.

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15

Aryal, P., A. Khan, H. J. Kim, et al. "Development of Tin-Based Single Crystal Scintillator for Double-Beta Decay Experiments." IEEE Transactions on Nuclear Science 67, no. 6 (2020): 922–26. http://dx.doi.org/10.1109/tns.2020.2978903.

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16

Minakata, Hisakazu, and Hiroaki Sugiyama. "Lower bound on |Ue3|2 from single and double beta decay experiments." Physics Letters B 526, no. 3-4 (2002): 335–44. http://dx.doi.org/10.1016/s0370-2693(01)01508-8.

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17

Belli, P., R. Bernabei, F. Cappella, et al. "New studies on the radiopurity and performances of Cs₂ZrCl₆ crystal scintillators." Journal of Instrumentation 19, no. 05 (2024): P05037. http://dx.doi.org/10.1088/1748-0221/19/05/p05037.

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Abstract In this work, we present new studies by using different materials and procedures to improve the performances and radiopurity of Cs2ZrCl6 (CZC) crystal scintillators. In particular, measurements of three new CZC crystals as scintillators were performed over 97.7 days live-time in the low-background DAMA/CRYS set-up deep underground at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N. They allow us to derive elements for improvements towards a possible future use of this kind of detectors in the search for neutrino-less double beta decay of 94,96Zr and rare single beta decay of

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18

Skalsey, M. "Reply to ‘‘Comment on ‘Feasibility of detecting neutrinoless double-beta decay between pairs of single-beta emitters’ ’’." Physical Review C 37, no. 4 (1988): 1780. http://dx.doi.org/10.1103/physrevc.37.1780.

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19

Soukeras, Vasileios, F. Cappuzzello, D. Carbone, et al. "Recent results in the study of the 20Ne + 130Te collision within the NUMEN project and future perspectives." HNPS Advances in Nuclear Physics 30 (July 31, 2024): 154–59. http://dx.doi.org/10.12681/hnpsanp.6256.

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The NUMEN (Nuclear Matrix Elements for Neutrinoless double beta decay) project aims to investigate specific heavy–ion double charge exchange reactions to provide experimentally data driven information about nuclear matrix elements of interest in the context of neutrinoless double beta decay (0νββ). Taking into consideration that 130Te is a candidate nucleus for double beta decay, the 20Ne + 130Te system was experimentally investigated in a multi-channel approach by measuring the complete net of reaction channels, namely elastic and inelastic scattering, double charge exchange, single charge ex

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20

Kotila, Jenni. "Role of Single-Particle Energies in Microscopic Interacting Boson Model Double Beta Decay Calculations." Universe 7, no. 3 (2021): 66. http://dx.doi.org/10.3390/universe7030066.

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Single-particle level energies form a significant input in nuclear physics calculations where single-particle degrees of freedom are taken into account, including microscopic interacting boson model investigations. The single-particle energies may be treated as input parameters that are fitted to reach an optimal fit to the data. Alternatively, they can be calculated using a mean field potential, or they can be extracted from available experimental data, as is done in the current study. The role of single-particle level energies in the microscopic interacting boson model calculations is discus

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21

Simkovic, F., P. Domin, and S. V. Semenov. "The single state dominance hypothesis and the two-neutrino double beta decay of100Mo." Journal of Physics G: Nuclear and Particle Physics 27, no. 11 (2001): 2233–40. http://dx.doi.org/10.1088/0954-3899/27/11/304.

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22

LITVINOV, YURI A. "MASS AND LIFETIME MEASUREMENTS AT THE PRESENT ESR FACILITY." International Journal of Modern Physics E 18, no. 02 (2009): 323–34. http://dx.doi.org/10.1142/s0218301309012355.

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Mass and lifetime measurements of stored exotic nuclei is one of the successful experimental programs at the FRS-ESR facility of GSI, Darmstadt. Two experimental techniques, namely Isochronous and time-resolved Schottky mass spectrometry have been developed. Nuclides in a very broad range of half-lives starting from stable down to only a few ten microseconds can be addressed. Single stored ions can be measured which makes these techniques highly efficient. More than 1100 atomic masses have been measured meanwhile. Half-life measurements are performed with bare and few-electron ions. Decay prop

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23

Ejiri, Hiroyasu. "Neutrino-Mass Sensitivity and Nuclear Matrix Element for Neutrinoless Double Beta Decay." Universe 6, no. 12 (2020): 225. http://dx.doi.org/10.3390/universe6120225.

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Neutrinoless double beta decay (DBD) is a useful probe to study neutrino properties such as the Majorana nature, the absolute neutrino mass, the CP phase and the others, which are beyond the standard model. The nuclear matrix element (NME) for DBD is crucial to extract the neutrino properties from the experimental transition rate. The neutrino-mass sensitivity, i.e., the minimum neutrino-mass to be measured by the DBD experiment, is very sensitive to the DBD NME. Actually, the NME is one of the key elements for designing the DBD experiment. Theoretical evaluation for the DBD NME, however, is v

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24

Kondev, F. G., D. J. Hartley, R. Orford, et al. "Masses and Beta-decay Studies of Neutron-rich Nuclei using the X-array and Gammasphere." EPJ Web of Conferences 223 (2019): 01028. http://dx.doi.org/10.1051/epjconf/201922301028.

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Properties of neutron-rich nuclei in the A˜160 region are important for achieving a better understanding of the nuclear structure in this region where little is known owing to diffculties in the production of these nuclei at the present nuclear physics facilities. These properties are essential ingredients in the interpretation of the rareearth peak at A˜160 in the r process abundance distribution, since theoretical models are sensitive to nuclear structure input. Predicated on these ideas, we have initiated a new experimental program at Argonne National Laboratory. During the first experiment

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25

Bondy, Aaron T., and Gordon W. F. Drake. "Charge-State Distributions after Beta Decay of 6He to Form 6Li+." Atoms 11, no. 3 (2023): 41. http://dx.doi.org/10.3390/atoms11030041.

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The shake-off processes and charge-state fractions of 6Li+, 6Li++, and 6Li3+ were studied following the beta decay of 6He in the 1s21S0, 1s2s1S0, and 1s2s3S1 initial states. The sudden approximation was used, together with fully correlated Hylleraas wave functions and pseudostates. A projection operator method was introduced to separate the charge-state fractions in the positive energy region of overlapping continua. The results show that 6Li++ (single-ionisation) remains dominant, even in the energy range E>0, where the formation of 6Li3+ (double-ionisation) is energetically allowed. The r

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26

Ejiri, Hiroyasu. "Single- and Double-Charge Exchange Reactions and Nuclear Matrix Element for Double-Beta Decay." Universe 8, no. 9 (2022): 457. http://dx.doi.org/10.3390/universe8090457.

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Neutrino properties such as the Majorana nature and the masses, which go beyond the standard model, are derived from the experimental double-beta decay (DBD) rate by using the DBD nuclear matrix element (NME). Theoretical evaluations for the NME, however, are very difficult. Single-charge exchange reactions (SCERs) and double-charge exchange reactions (DCERs) are used to study nuclear isospin (τ) and spin (σ) correlations involved in the DBD NME and to theoretically calculate the DBD NME. Single and double τσ NMEs for quasi-particle states are studied by SCERs and DCER. They are found to be re

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27

Moreno, O., R. Álvarez-Rodríguez, E. Moya de Guerra, P. Sarriguren, F. Šimkovic, and Amand Faessler. "Test of the single state dominance hypothesis for the two-neutrino double beta decay." Journal of Physics: Conference Series 203 (January 1, 2010): 012063. http://dx.doi.org/10.1088/1742-6596/203/1/012063.

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28

Sgouros, Onoufrios, Francesco Cappuzzello, Manuela Cavallaro, et al. "Recent results on the analysis of the ¹⁸O+⁴⁸Ti collision at 275 MeV: Single charge exchange reaction." EPJ Web of Conferences 304 (2024): 01005. http://dx.doi.org/10.1051/epjconf/202430401005.

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The present work is inherent to the NUMEN project that aims at providing data-driven information for the nuclear matrix elements of the neutrinoless double beta decay through the study of heavy-ion induced double charge exchange reactions. This is a formidable task since during a nuclear collision, the same final states may be populated through various reaction mechanisms. In this respect, understanding the degree of competition between successive nucleon transfer and charge exchange reactions is crucial for the proper description of the meson-exchange mechanism. To this purpose, the reaction

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29

Khan, Arshad, Pabitra Aryal, Hongjoo Kim, Moo Hyun Lee, and Yeongduk Kim. "PbMoO4 Synthesis from Ancient Lead and Its Single Crystal Growth for Neutrinoless Double Beta Decay Search." Crystals 10, no. 3 (2020): 150. http://dx.doi.org/10.3390/cryst10030150.

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A powder synthesis of PbMoO4 (PMO) from ancient lead (Pb) and deeply purified commercial MoO3 powders was performed using a wet chemistry technique to achieve the low radioactivity scintillator for neutrinoless double beta decay search in 100Mo. The synthesized powders were used to grow single crystals of PbMoO4 by the Czochralski technique in an Ar environment. The luminescence and scintillation properties were measured with excitations using UV, X- and γ-rays in the temperature range of 10–300 K. Annealing of the grown PMO crystal in an air atmosphere significantly enhanced the scintillation

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30

Beeman, Jeff W., Fedor A. Danevich, Volodimir Yakovych Degoda, et al. "An Improved ZnMoO4 Scintillating Bolometer for the Search for Neutrinoless Double Beta Decay of 100Mo." Journal of Low Temperature Physics 167, no. 5-6 (2012): 1021–28. https://doi.org/10.1007/s10909-012-0573-z.

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We present a prototype scintillating bolometer for the search for neutrino-less double β decay of 100Mo, consisting of a single ≈5 g ZnMoO4 crystal operated aboveground in the 20–30 mK temperature range. The scintillation light is read out by two thin Ge bolometers. The phonon signals are collected by NTD Ge thermistors. The ZnMoO4 crystal was grown with an advanced method (low-thermal-gradient Czochralski technique) and after purification of molybdenum. The results are very encouraging: the intrinsic energy resolution of the heat channel is ≈800 eV FWHM, the α/β rejection factor (crucial for

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31

SARRIGUREN, P., R. ÁLVAREZ-RODRÍGUEZ, O. MORENO, and E. MOYA DE GUERRA. "THE GAMOW-TELLER RESPONSE IN DEFORMED NUCLEI." International Journal of Modern Physics E 15, no. 07 (2006): 1397–406. http://dx.doi.org/10.1142/s0218301306004958.

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We study Gamow-Teller strength distributions within a QRPA approach performed on top of a deformed Skyrme-Hartree-Fock+BCS single particle basis with the inclusion of residual spin-isospin interactions in both particle-hole and particle-particle channels. We focus our attention in several problems of interest in Nuclear Structure and Nuclear Astrophysics, such as the β-decay properties of proton-rich medium-mass nuclei of astrophysical interest and the deformation dependence of the Gamow-Teller strength distributions in neutron deficient Pb isotopes. We also discuss the role of deformation in

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32

Jones, B. J. P., A. D. McDonald, and D. R. Nygren. "Single molecule fluorescence imaging as a technique for barium tagging in neutrinoless double beta decay." Journal of Instrumentation 11, no. 12 (2016): P12011. http://dx.doi.org/10.1088/1748-0221/11/12/p12011.

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33

Civitarese, O., H. Muther, L. D. Skouras, and A. Faessler. "Single beta+-decay in26Mg: a comparison between the shell model and quasiparticle random phase approximation." Journal of Physics G: Nuclear and Particle Physics 17, no. 9 (1991): 1363–73. http://dx.doi.org/10.1088/0954-3899/17/9/010.

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Arnaboldi, C., C. Brofferio, A. Bryant, et al. "Production of high purity TeO2 single crystals for the study of neutrinoless double beta decay." Journal of Crystal Growth 312, no. 20 (2010): 2999–3008. http://dx.doi.org/10.1016/j.jcrysgro.2010.06.034.

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35

Cheoun, M. K., Amand Faessler, F. Šimkovic та G. Teneva. "Two neutrino (2 ν) double and single beta decay by QRPA with neutron-proton pairing". Progress in Particle and Nuclear Physics 32 (січень 1994): 315–27. http://dx.doi.org/10.1016/0146-6410(94)90028-0.

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36

Rooh, Gul, Heedong Kang, H. J. Kim, H. Park, and Sih-Hong Doh. "Scintillation Characteristics of the SrCl$_{2}$ Single Crystal for the Neutrinoless $\beta^{+}$/EC Decay Search." IEEE Transactions on Nuclear Science 55, no. 3 (2008): 1445–48. http://dx.doi.org/10.1109/tns.2008.920252.

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37

FIORINI, ETTORE. "NEUTRINO IN PHYSICS AND ASTROPHYSICS." International Journal of Modern Physics D 22, no. 11 (2013): 1360003. http://dx.doi.org/10.1142/s0218271813600031.

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The recent impact of the discovery of neutrino oscillations and the related evidence of a finite neutrino mass has stimulated searches to actually measure or constraint the effective mass of this particle. Present and planned experiments based on cosmology and on single and double beta decay will be reviewed together with the suggested possibility of a Majorana nature of the neutrino.

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38

Sahu, R., P. C. Srivastava, and V. K. B. Kota. "Deformed shell model results for two-neutrino double-beta decay of 82Se." Canadian Journal of Physics 89, no. 11 (2011): 1101–5. http://dx.doi.org/10.1139/p11-116.

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The half-life for two-neutrino double-beta decay has been calculated for 82Se, within the framework of the deformed shell model (DSM) based on Hartree–Fock states employing a modified Kuo interaction in 2p3/2, 1f5/2, 2p1/2, and 1g9/2 space with single particle energies (relative to a 56Ni core) for the four orbitals taken as 0.0, 0.78, 1.08, and 4.25 MeV, respectively. A reasonable description is obtained for the spectroscopic properties of yrast levels in 82Se, and similarly in the past 82Kr was studied successfully using DSM. The half-life calculated using DSM is ∼3.56 × 1020 a compared to t

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SAHU, R., and V. K. B. KOTA. "DEFORMED SHELL MODEL RESULTS FOR TWO-NEUTRINO POSITRON DOUBLE BETA DECAY OF 84Sr." International Journal of Modern Physics E 20, no. 08 (2011): 1723–33. http://dx.doi.org/10.1142/s021830131101957x.

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Half-lives [Formula: see text] for two-neutrino positron double beta decay modes β+ EC/ECEC are calculated for 84 Sr , a nucleus of current experimental interest, within the framework of the deformed shell model based on Hartree–Fock states employing a modified Kuo interaction in (2p3/2, 1f5/2, 2p1/2, 1g9/2) space. For a reasonable description of the spectra of 84 Sr and 84 Kr and to generate allowed GT strengths, the single particle energies of the proton and neutron 1g9/2 orbitals, relative to the 2p3/2 orbital energy, are chosen to be 3.5 MeV and 1.5 MeV for both 84 Sr and 84 Rb and 1.5 MeV

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Lenske, Horst, Jessica Bellone, Maria Colonna, Danilo Gambacurta, and Jose-Antonio Lay. "Formal theory of heavy ion double charge exchange reactions." EPJ Web of Conferences 292 (2024): 04001. http://dx.doi.org/10.1051/epjconf/202429204001.

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The theory of heavy ion double charge exchange (DCE) reactions A(Z, N) → A(Z ± 2, N ∓ 2) is recapitulated emphasizing the role of Double Single Charge Exchange (DSCE) and pion-nucleon Majorana DCE (MDCE) reactions. DSCE reactions are of second–order distorted wave character, mediated by isovector nucleon-nucleon (NN) interactions. The DSCE response functions resemble the nuclear matrix elements (NME) of 2ν2β decay. The MDCE process proceeds by a dynamically generated effective rank-2 isotensor interaction, defined by off–shell pion–nucleon DCE scattering. In closure approximation pion potentia

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41

Sah, P. "Role of calcium influx and buffering in the kinetics of Ca(2+)-activated K+ current in rat vagal motoneurons." Journal of Neurophysiology 68, no. 6 (1992): 2237–47. http://dx.doi.org/10.1152/jn.1992.68.6.2237.

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1. Intracellular recordings were obtained from neurons of the dorsal motor nucleus of the vagus (DMV) in transverse slices of the rat medulla maintained in vitro. These neurons had a resting potential of -59.8 +/- 8.7 (SD) mV. Single action potentials elicited by brief depolarizing current pulses were followed by a prolonged afterhyperpolarization (AHP). Under voltage clamp, the current underlying the AHP was found to be a calcium-activated potassium current. 2. The outward current (GkCa,1) was voltage insensitive and was not blocked by tetraethylammonium (TEA) (10 mM). Unlike the slower time

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42

Spatafora, A., L. Acosta, C. Agodi, et al. "Experimental and theoretical multi-channel study of direct nuclear reactions: a tool to provide data driven information on the ⁷⁶Ge neutrino-less double-beta decay." Journal of Physics: Conference Series 2586, no. 1 (2023): 012134. http://dx.doi.org/10.1088/1742-6596/2586/1/012134.

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Abstract The study of heavy-ions induced double charge-exchange (HI-DCE) nuclear reactions is a promising way to access data-driven information on neutrino-less double-beta decay nuclear matrix elements. In the following, particular attention is given to the (18O,18Ne) and (20Ne,20O) HI-DCE reactions as tools for β + β + and β − β − decays, respectively. The experiments are performed in Catania at the Laboratori Nazionali del Sud of the Istituto Nazionale di Fisica Nucleare (INFN-LNS). The MAGNEX magnetic spectrometer is used to momentum analyse the ejectiles of a large network of nuclear reac

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Michel, Thilo, Thomas Gleixner, Jürgen Durst, Mykhaylo Filipenko, and Stefan Geißelsöder. "The Potential of Hybrid Pixel Detectors in the Search for the Neutrinoless Double-Beta Decay of116Cd." Advances in High Energy Physics 2013 (2013): 1–20. http://dx.doi.org/10.1155/2013/105318.

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We investigated the potential of the energy resolving hybrid pixel detector Timepix contacted to a CdTe sensor layer for the search for the neutrinoless double-beta decay ofCd. We found that a CdTe sensor layer with 3 mm thickness and 165 μm pixel pitch is optimal with respect to the effective Majorana neutrino mass (mββ) sensitivity. In simulations, we were able to demonstrate a possible reduction of the background level caused by single electrons by approximately 75% at a specific background rate of 10−3counts/(kg×keV×yr) at a detection efficiency reduction of about 23% with track analysis e

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SUHONEN, JOUNI. "NUCLEAR-STRUCTURE EFFECTS ON DOUBLE BETA DECAYS TO 0+ STATES IN 76Ge." International Journal of Modern Physics E 20, no. 02 (2011): 451–58. http://dx.doi.org/10.1142/s0218301311017843.

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Neutrinoless double beta (0νββ) decay of 76 Ge to the ground state and first excited 0+ state in 76 Se is discussed in terms of the associated nuclear matrix elements. The effects arizing from the size of the single-particle model space and the occupancies of the individual orbits are discussed in the framework of the (higher) quasiparticle random-phase approximation with effective, G -matrix-derived nuclear forces. It is found that the orbital occupancies play a role for the size of the nuclear matrix element. Contrary to the ground-state transition the transition to the first excited 0+ stat

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Theodórsson, Pall. "Simultaneously Measuring 14C and Radon in Benzene Dating Samples." Radiocarbon 47, no. 2 (2005): 231–34. http://dx.doi.org/10.1017/s0033822200019731.

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After benzene synthesis, radiocarbon dating samples are usually stored for 3–4 weeks before counting to allow an eventual radon contamination to decay to a negligible level. This paper presents a technique that can minimize, and often eliminate, this delay by using a simple single-phototube liquid scintillation counting system, specifically designed for 14C dating. Radon contamination is assessed by pulses of 214Po (a 222Rn decay product, half-life 0.16 μs), identified through pulse-time analysis. For each 214Po pulse, 0.49 beta particle pulses of 214Pb and 214Bi fall in the 14C counting windo

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Rittirong, A., T. Yoshimoto, R. Hazama, et al. "Isotope separation by DC18C6 crown-ether for neutrinoless double beta decay of ⁴⁸Ca." Journal of Physics: Conference Series 2147, no. 1 (2022): 012015. http://dx.doi.org/10.1088/1742-6596/2147/1/012015.

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Abstract The isotope separation via liquid-liquid extraction (LLE) using crown-ether (DC18C6) was carried out in order to demonstrate the feasibility of calcium isotope enrichment, which aimed to find a cost-effective way to enrich calcium-48 (48Ca) for the study of neutrinoless double beta decay (0vββ) in the CANDLES project. The LLE results revealed that the extraction was solvent dependent in the presence of HCl and the distribution coefficient (D) increased approximately threefold (0.0546±0.0012) with 12 M HCl solvent under a 3.9 M CaCl2 (aq) (30% w/w) system. Furthermore, the HCl solvent

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Watts, M. P. "nEXO photon detection system and read-out electronics." Journal of Instrumentation 20, no. 06 (2025): C06009. https://doi.org/10.1088/1748-0221/20/06/c06009.

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Abstract nEXO is a next-generation 5-tonne liquid xenon (LXe) time projection chamber that will search for the neutrinoless double beta decay of 136Xe, which is a lepton number violating process that can occur if neutrinos are massive Majorana fermions. The experiment has a projected half-life sensitivity of 1.35 × 1028 years over 10 years of livetime, which sets a design goal of ≲ 1% energy resolution (σE/E) at the decay Q-value of 2.458 MeV. Achieving this resolution goal requires single photon resolution at the vacuum-ultraviolet scintillation wavelength of LXe of 175 nm while maintaining s

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Ebrahiem, Sameera Ahmed, and Taghreed A. Younis. "Finding Most Stable Isobar for Nuclides with Mass Number (165- 175) against Beta Decay." NeuroQuantology 19, no. 4 (2021): 15–19. http://dx.doi.org/10.14704/nq.2021.19.4.nq21032.

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In the beta decay process, a neutron converts into a proton, or vice versa, so the atom in this process changes to a more stable isobar. Bethe-Weizsäcker used a quasi-experimental formula in the present study to find the most stable isobar for isobaric groups of mass nuclides (A=165-175). In a group of isobars, there are two methods of calculating the most stable isobar. The most stable isobar represents the lowest parabola value by calculating the binding energy value (B.E) for each nuclide in this family, and then drawing these binding energy values as a function of the atomic number (Z) in

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Yang, Jingzhe, Yang Tian, Wenhan Dai, et al. "A feasibility study of multi-electrode high-purity germanium detector for ⁷⁶Ge neutrinoless double beta decay searching." Journal of Instrumentation 18, no. 05 (2023): P05025. http://dx.doi.org/10.1088/1748-0221/18/05/p05025.

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Abstract Experiments to search for neutrinoless double-beta (0νββ) decay of 76Ge using a high-purity germanium (HPGe) detector rely heavily on background suppression technologies to enhance their sensitivities. In this work, we proposed a pulse-shape analysis method based on a neural network (NN) and a light gradient boosting machine (lightGBM; LGB) to discriminate single-electron (background) and double-electrons (0νββ signal) events in a multi-electrode HPGe detector. In this paper, we describe a multi-electrode HPGe detector system, a data-processing system, and pulse-shape simulation proce

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Riley, Matthew L., Scott D. Chambers, and Alastair G. Williams. "Inter-Comparison of Radon Measurements from a Commercial Beta-Attenuation Monitor and ANSTO Dual Flow Loop Monitor." Atmosphere 14, no. 9 (2023): 1333. http://dx.doi.org/10.3390/atmos14091333.

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Radon (Rn) is a radioactive, colourless, odourless, noble gas that decays rapidly. It’s most stable isotope, 222Rn, has a half-life of around 3.8 days. Atmospheric radon measurements play an important role in understanding our atmospheric environments. Naturally occurring radon can be used as an atmospheric tracer for airmass tracking, to assist in modelling boundary layer development, and is important for understanding background radiation levels and personal exposure to natural radiation. The daughter products from radon decay also play an important role when measuring fine particle pollutio

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