Relevant bibliographies by topics / Borromean nuclei

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Academic literature on the topic 'Borromean nuclei'

Author: Grafiati
Published: 9 March 2023

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Journal articles on the topic "Borromean nuclei"

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Vaagen, J. S., D. K. Gridnev, H. Heiberg-Andersen, B. V. Danilin, S. N. Ershov, V. I. Zagrebaev, I. J. Thompson, M. V. Zhukov, and J. M. Bang. "Borromean Halo Nuclei." Physica Scripta T88, no. 1 (2000): 209. http://dx.doi.org/10.1238/physica.topical.088a00209.

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Hussein, M. S., B. V. Carlson, and T. Frederico. "Inclusive breakup of Borromean nuclei." Journal of Physics: Conference Series 863 (June 2017): 012035. http://dx.doi.org/10.1088/1742-6596/863/1/012035.

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Bertsch, G. F., K. Hencken, and H. Esbensen. "Nuclear breakup of Borromean nuclei." Physical Review C 57, no. 3 (March 1, 1998): 1366–77. http://dx.doi.org/10.1103/physrevc.57.1366.

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Garrido, E., D. V. Fedorov, and A. S. Jensen. "Borromean nuclei and three-body resonances." European Physical Journal A 25, S1 (August 11, 2005): 323–24. http://dx.doi.org/10.1140/epjad/i2005-06-152-7.

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HATEGAN, CORNEL, REMUS AMILCAR IONESCU, and HERMANN H. WOLTER. "THE BOUNDARY CONDITION MODEL APPROACH TO BORROMEAN NUCLEI." Modern Physics Letters A 22, no. 20 (June 28, 2007): 1469–79. http://dx.doi.org/10.1142/s021773230702381x.

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Three-body systems are studied in the framework of the Boundary Condition Model, in which the relevant interactions are expressed in terms of the scattering lengths of the two-body subsystems. We demonstrate explicitly the role of resonant states in the two-body subsystems and of multiple scattering between the constituents in producing a weakly bound three-body system, i.e. a Borromean nucleus. We obtain qualitative relations between the spatial extension of the three-body bound state, its energy, and the scattering lengths in the subsystems. The results are compared with experimental data for the Borromean nucleus 11 Li and 14 Be .
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YAMASHITA, M. T., T. FREDERICO, and M. H. HUSSEIN. "A DOORWAY TO BORROMEAN HALO NUCLEI: THE SAMBA CONFIGURATION." Modern Physics Letters A 21, no. 22 (July 20, 2006): 1749–55. http://dx.doi.org/10.1142/s0217732306020056.

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We exploit the possibility of new configurations in three-body halo nuclei, Samba type (the neutron-core form a bound system) as a doorway to Borromean systems. The nuclei 12 Be , 15 B , 23 N and 27 F are of such nature, in particular 23 N with a half-life of 37.7 s and a halo radius of 6.07 fm is an excellent example of Samba-halo configuration. The fusion below the barrier of the Samba halo nuclei with heavy targets could reveal the so far elusive enhancement and a dominance of one-neutron over two-neutron transfers, in contrast to what was found recently for the Borromean halo nucleus 6 He +238 U .
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HAGINO, K., H. SAGAWA, and T. OISHI. "DINEUTRON CORRELATION IN THE GROUND STATE AND E1 EXCITATIONS OF BORROMEAN NUCLEI." Modern Physics Letters A 25, no. 21n23 (July 30, 2010): 1842–45. http://dx.doi.org/10.1142/s0217732310000459.

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Using a three-body model with density-dependent contact interaction, we discuss the role of dineutron correlation in the ground state properties as well as in the dipole excitation of typical weakly-bound Borromean nuclei, 11 Li and 6 He . We show that, while both the nuclei manifest themselves similar strong dineutron correlations to each other in the ground state, the energy distributions for the two emitted neutrons from the dipole excitation are considerably different. We also discuss briefly the diproton correlation in a proton-rich Borromean nucleus, 17 Ne .
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Bang, J. M., B. V. Danilin, V. D. Efros, J. S. Vaagen, M. V. Zhukov, and I. J. Thompson. "Few-body aspects of Borromean halo nuclei." Physics Reports 264, no. 1-5 (January 1996): 27–37. http://dx.doi.org/10.1016/0370-1573(95)00024-0.

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Danilin, B. D., I. J. Thompson, M. V. Zhukov, and J. S. Vaagen. "Few-body cluster models for Borromean halo nuclei." Physics of Atomic Nuclei 64, no. 7 (July 2001): 1215–22. http://dx.doi.org/10.1134/1.1389545.

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Kamada, H., J. Furuya, M. Yamaguchi, and E. Uzu. "Core-Excitation Three-Cluster Model of Borromean Nuclei." Few-Body Systems 55, no. 8-10 (January 17, 2014): 935–39. http://dx.doi.org/10.1007/s00601-013-0799-6.

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Dissertations / Theses on the topic "Borromean nuclei"

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Singh, Jagjit. "New approaches to the physics of weakly-bound nuclei : treatment of continuum in 6He." Doctoral thesis, Università degli studi di Padova, 2016. http://hdl.handle.net/11577/3424361.

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Nowadays in low energy nuclear physics, the study of properties of the neutron dripline nuclei is a highly interesting topic. The study of the structure of 2n-halo Borromean nuclei demands for a three-body description with proper treatment of continuum, the conventional shell-model assumptions being insufficient. This thesis is focused on the development of a simple nuclear structure model for ground and continuum states of Borromean nuclei. Initially it is tested for 6 He, the states of which are built by starting from the continuum single-particle p-states of 5 He. The quadrupole response (0+ → 2+ ) for 6He has been investigated, finding two resonances, the narrow low-lying 2+ and a broader 2+ at 2.9 MeV above threshold with a width of about 1.8 MeV. With the aim of studying also negative parity states of 6He, the model space has been extended with inclusion of sd-continuum waves of 5 He. The extension of model space is a computationally challenging problem. The role of different continuum components in the weakly bound nucleus 6He is studied by coupling unbound spd-waves of 5 He by using simple pairing contact-delta inter-action. Our results show that the 6He ground state 0+ displays collective nature by taking contribution from five different oscillating continuum states i.e. (s1/2 )2 , (p1/2 )2 , (p3/2 )2 , (d3/2 )2 and (d5/2 )2 , that sum up to give an exponentially decaying bound wavefunction Other ground state properties of 6 He have been calculated and compared with other theories and experiments. The two-particle density as a function of the radius r1 = r2 ≡ r and the angle θ12, is also calculated, finding two peaks, one at angles smaller than 90o and one at larger angles, referred to as “di-neutron”and “cigar-like”configurations respectively. Di-neutron component has higher density and it has a longer radial tail, which confirms the halo structure of 6He, while the cigar-like component has a very compact structure comparatively. We have also investigated electric transitions to the continuum : the monopole(five configurations), dipole (five configurations), quadrupole (seven configurations) and octupole (three configurations) response of the system and contributions of different configurations to these electric multipoles has been discussed. The shapes and total integrated strengths of monopole, dipole and quadrupole response functions are in well agreement with previous studies.
Oggigiorno lo studio delle proprietà dei nuclei vicini alla dripline neutronica è un argomento di grande interesse in fisica nucleare delle basse energie. Lo studio della struttura dei nuclei Borromeani con alone di 2 neutroni richiede una descrizione a tre corpi con un’opportuna trattazione del continuo che il modello a shell tradizionale non fornisce. Questra tesi si concentra sullo sviluppo di un semplice modello di struttura nucleare per lo stato fondamentale e le risonanze nei nuclei Borromeani. Inizialmente viene testata sull’6 He, i cui stati sono costruiti a partire da stati p risonanti dell’5 He. La risposta per eccitazioni di quadrupolo (0+ → 2+ ) per l’6 He è stata investigata, trovando due risonanze, uno stretto stato 2+ a bassa energia e uno più largo a 2.9 MeV sopra la soglia con una larghezza di circa 1.8 MeV. In seguito, allo scopo di studiare anche gli stati a parità negativa dell’6 He, lo spazio modello è stato esteso con l’inclusione delle onde s e d dell’5He. Il ruolo delle differenti componenti del continuo nel nucleo debolmente legato 6 He è stato studiato accoppiando onde spd slegate dell’5He per mezzo di una interazione di paring del tipo contact-delta. I risultati mostrano che lo stato fondamentale 0+ dell’6 He mostra una natura collettiva che prende contributi da cinque diversi stati oscillanti del continuo, ovvero (s1/2 )2 , (p1/2)2, (p3/2 )2 , (d3/2 )2 e (d5/2 )2, che si sommano per dare una funzione d’onda legata che decade con andamento esponenziale. Ulteriori proprietà dello stato fondamentale sono state calcolate e comparate con altre teorie ed esperimenti. Una funzione che rappresenta la densità di due particelle è stata calcolata in funzione del raggio r1 = r2 ≡ r e dell’angolo θ12 , trovando due picchi, uno ad angoli minori di 90o e uno ad angoli maggiori, chiamati rispettivamente configurazione a “dineutrone”e a “sigaro”. La componente a dineutrone possiede una densità maggiore e una coda radiale più estesa, che conferma la struttura ad alone dell’6He, mentre la componente a sigaro ha una struttura comparativamente più compatta. Abbiamo anche investigato le transizioni elettriche al continuo: monopolo (5 configurazioni), dipolo (5 configurazioni), quadrupolo (7 configurazioni) e ottupolo (3 configurazioni), discutendo la riposta del sistema e il contributo di ciascuna configurazione. La forma e l’integrale delle funzioni di risposta di monopolo, dipolo e quadrupolo si accordano col risultato di studi precedenti.
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Miyamoto, Tomokazu. "A four-body model for the breakup of Borromean nucleus 22C." Thesis, University of Surrey, 2017. http://epubs.surrey.ac.uk/813343/.

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A Borromean system is a bound 3-body system where no 2-body subsystems are bound. In nuclear physics, a nucleus that can be modelled as a Borromean system is called a Borromean nucleus; 6 He and 11 Li are good examples of this. Recent research suggests that this Borromean nature should also be exhibited by 22 C, the heaviest-known carbon isotope. In this PhD thesis, a schematic approach is taken to study reactions involving Borromean nuclei. Hyperspherical formalism (HH) and coordinate space Faddeev (CSF) method are used for creating their 3-body bound state wave functions. We formulate the reactions of a Borromean nucleus with a stable target at incident energies ranging from tens of (MeV) to a few hundred (MeV); we adopt a 4-body reaction model to deepen our understanding of the reaction mechanism involving Borromean nuclei. The Glauber-WKB framework is used to describe these reactions, which is well-suited for these incident energies. Introducing Watson-Migdal final state interaction, we calculate the E1 strengths for Borromean nuclei so as to elucidate their breakup mechanism and we explore the possibility of the existence of a soft dipole mode. We also calculate the differential breakup cross sections to see how the post-collision interaction can have an impact on the cross sections. As far as 22 C is concerned, it is found that the reactions are mainly focused on the forward angle region, and the contributions from the higher order terms are not significant. This implies that the non-eikonal trajectories do not play a crucial role in the reaction mechanism. Also, both E1 distributions and breakup cross sections seem to sensitive to the 2n-separation energies of the bound state wave functions, but the E1 distributions and the cross sections to 1− continuum state seem not to be sensitive to the FSIs; cross sections to 0+ and 2+ continuum states seem to be sensitive to the FSIs. Our findings does not support the view that, if an soft dipole mode exists, it is induced by the FSIs.
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Assié, Marlene. "Influence des corrélations entre les nucléons sur les réactions de cassure nucléaire : aspects théorique et expérimentaux." Phd thesis, Université Paris Sud - Paris XI, 2008. http://tel.archives-ouvertes.fr/tel-00359266.

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La cassure nucléaire en tant qu'outil pour sonder les corrélations entre les nucléons du noyau a été étudiée d'un point de vue théorique et expérimental.
Une théorie, appelée Time Dependant Density Matrix (TDDMP), basée sur une approche de champ moyen et prenant en compte les corrélations à deux corps a été développée. Elle permet de décrire l'évolution dynamique d'un noyau corrélé, notamment pour le mécanisme de cassure nucléaire. Cette étude montre que les distributions en angle relatif des nucléons émis sont très différentes pour des corrélations initiales différentes : deux nucléons dans une configuration spatiale proche donnent lieu à une émission de neutrons avec un petit angle relatif, alors qu'une configuration où les nucléons sont éloignés conduit à de grands angles relatifs.
L'6He, noyau borroméen, présente de fortes corrélations entre les deux neutrons de son halo. Deux configurations dominantes sont prédites pour l'état fondamental de ce noyau : la configuration di-neutron (où les deux neutrons sont proches) et la configuration cigare (où les deux neutrons sont de part et d'autre du coeur).
La cassure nucléaire de l'6He sur cible de 208Pb a été réalisée au GANIL avec un faisceau SPIRAL : les noyaux d'4He issus de la cassure étaient détectés à l'aide d'un Silicium à pistes couplé à un Silicium-Lithium, et les neutrons à l'aide des détecteurs EDEN et du mur à Neutrons (Neutron Wall) afin d'avoir une large couverture angulaire.
Les fonctions de corrélation extraites des données montrent la présence de fortes corrélations à petit angle relatif mais aussi à grand relatif, qui peuvent être attribuées respectivement à la configuration di-neutron et à la configuration cigare. L'état fondamental de l'6He serait donc constitué par une superposition de ces deux configurations.
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Books on the topic "Borromean nuclei"

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Close, Frank. 7. Exotic nuclei. Oxford University Press, 2015. http://dx.doi.org/10.1093/actrade/9780198718635.003.0007.

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‘Exotic nuclei’ discusses halo nuclei, borromean nuclei, hypernuclei, strange matter, and antimatter. Unstable isotopes with a larger excess of neutrons, or an excess of protons may form halos around a central core—halo nuclei or borromean structures, which have short half-lives, typically of the order of milliseconds. If a quark in a neutron or proton is replaced by a strange quark, the resulting particle carries the property of strangeness, and is generically known as a ‘hyperon’. A hypernucleus is formed when a hyperon replaces a nucleon within a nucleus. Antimatter exists in quantum theory, but there seems no evidence that it occurs in practice in the observable universe.
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Book chapters on the topic "Borromean nuclei"

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Danilin, B., J. S. Vaagen, I. J. Thompson, and M. V. Zhukov. "Three-Body Resonances in Borromean Halo Nuclei." In Few Body Systems, 122–31. Vienna: Springer Vienna, 2001. http://dx.doi.org/10.1007/978-3-7091-6114-2_13.

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Vaagen, J. S., G. Hagen, B. V. Danilin, S. N. Ershov, and I. J. Thompson. "Exotic Matter at the Low Density Limit: Exploring Bound and Continuum Structures of Borromean Halo Nuclei." In Structure and Dynamics of Elementary Matter, 463–77. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2705-5_36.

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"Borromean and Efimov states." In Structure and Reactions of Light Exotic Nuclei, 497–501. CRC Press, 2003. http://dx.doi.org/10.1201/9780203168271.ax3.

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Navin, A., and A. Lemasson. "Probing Neutron Pair Transfer with Borromean Isotopes of Helium." In Fifty Years of Nuclear BCS, 393–404. WORLD SCIENTIFIC, 2013. http://dx.doi.org/10.1142/9789814412490_0029.

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Conference papers on the topic "Borromean nuclei"

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Shimoura, S., Hideyuki Sakai, Kimiko Sekiguchi, and Benjamin F. Gibson. "Direct Reactions of Borromean Nuclei." In POLARIZED ANTIPROTON BEAMS - HOW: An International Workshop. AIP, 2008. http://dx.doi.org/10.1063/1.2932303.

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PETRASCU, MARIUS. "EXPERIMENTAL AND THEORETICAL STATUS OF BORROMEAN HALO NUCLEI STRUCTURE INVESTIGATION." In Proceedings of the Carpathian Summer School of Physics 2005. WORLD SCIENTIFIC, 2006. http://dx.doi.org/10.1142/9789812772862_0049.

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Yamashita, M. T., T. Frederico, and Lauro Tomio. "Spatial characteristics of borromean, tango, samba and all-bound halo nuclei." In VI LATIN AMERICAN SYMPOSIUM ON NUCLEAR PHYSICS AND APPLICATIONS. AIP, 2007. http://dx.doi.org/10.1063/1.2710568.

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Hussein, M. S. "Low Energy Transfer Cross-Section for Borromean Halo Nuclei and the Breakup Threshold Anomaly." In FUSION06: Reaction Mechanisms and Nuclear Structure at the Coulomb Barrier. AIP, 2006. http://dx.doi.org/10.1063/1.2338405.

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Izosimov, Igor. "Structure of β-Decay Strength Function Sβ(E) in Halo Nuclei. Borromean Halo, Tango Halo, and Mixed Halo." In Proceedings of the Ito International Research Center Symposium "Perspectives of the Physics of Nuclear Structure". Journal of the Physical Society of Japan, 2018. http://dx.doi.org/10.7566/jpscp.23.013005.

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Smith, R., M. Freer, C. Wheldon, N. Curtis, S. Almaraz-Calderon, A. Aprahamian, N. I. Ashwood, et al. "Breakup branches of Borromean beryllium-9." In Nuclear Structure and Dynamics ’15. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4932289.

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Yilmaz, M., and O. Özer. "Nuclear Halos and Borromeans in the Primordial Nucleosynthesis Process and in Astrophysical Nuclear Reactions." In SIXTH INTERNATIONAL CONFERENCE OF THE BALKAN PHYSICAL UNION. AIP, 2007. http://dx.doi.org/10.1063/1.2733292.

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Lizcano, David. "Transfer and Breakup Modes of the Borromean 6He Nucleus in 209Bi near the Coulomb Barrier." In INSTRUMENTATION IN ELEMENTARY PARTICLE PHYSICS. AIP, 2003. http://dx.doi.org/10.1063/1.1604094.

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