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Journal articles on the topic 'Gamma rays or X-rays'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Osborne, J. L., A. W. Wolfendale, and L. Zhang. "Soft X-rays and cosmic gamma-rays." Monthly Notices of the Royal Astronomical Society 276, no. 2 (1995): 409–16. http://dx.doi.org/10.1093/mnras/276.2.409.

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2

Leising, Mark D. "Gamma-rays and X-rays from SN1987A." Nature 332, no. 6164 (1988): 516–18. http://dx.doi.org/10.1038/332516a0.

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3

Gan, Weiqun, Jin Chang, Youping Li, and Chunmei Lin. "Solar hard X-rays and gamma-rays." Science in China Series A: Mathematics 45, S1 (2002): 30–35. http://dx.doi.org/10.1007/bf02889681.

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4

Feder, Toni. "Duke Beams Hard Gamma Rays, Soft X Rays." Physics Today 55, no. 12 (2002): 26–27. http://dx.doi.org/10.1063/1.1537901.

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5

Kane, P. P. "Elastic scattering of gamma rays and X-rays." Radiation Physics and Chemistry 74, no. 6 (2005): 402–10. http://dx.doi.org/10.1016/j.radphyschem.2005.08.004.

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6

Kane, P. P. "Inelastic scattering of X-rays and gamma rays." Radiation Physics and Chemistry 75, no. 12 (2006): 2195–205. http://dx.doi.org/10.1016/j.radphyschem.2006.08.001.

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7

WACHTER, KERRI. "X-rays, Gamma Rays Added to Carcinogen List." Ob.Gyn. News 40, no. 6 (2005): 17. http://dx.doi.org/10.1016/s0029-7437(05)70093-8.

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8

WACHTER, KERRI. "X-rays, Gamma Rays Added to Carcinogen List." Rheumatology News 4, no. 3 (2005): 4. https://doi.org/10.1016/s1541-9800(05)70292-1.

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9

Dai, Ben-Zhong, and Li Zhang. "Gamma-Ray-Bright Blazars: The Spectral Properties in X-Rays and Gamma-Rays." Publications of the Astronomical Society of Japan 55, no. 5 (2003): 939–45. http://dx.doi.org/10.1093/pasj/55.5.939.

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10

Sriwongsa, Kittisak, Pairoj Pasuwan, Punsak Glumglomchit, et al. "THE X-/GAMMA-RAYS, PROTON AND ALPHA PARTICLES SHIELDING PROPERTIES FOR TUNGSTEN OXIDE POLYMER COMPOSITES." Suranaree Journal of Science and Technology 32, no. 1 (2025): 030273(1–8). https://doi.org/10.55766/sujst9438.

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In this work, the uncharged and charged ionizing radiation shielding properties for tungsten oxide polymer composites amount 9 samples were studied. The uncharged ionizing radiation such as X-rays and gamma-rays shielding properties were simulated at the tube voltages of 40-120 kVp and the energy range of 59.6-1,332 keV, respectively. The mass attenuation coefficients (μm), half value layer (HVL), and mean free path (MFP) values were discussed for both-rays. The charged ionizing radiation such as proton and alpha particles were determined mass stopping power (MSP), and projected range (PR) in

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11

Koshikawa, N., A. Omata, M. Masubuchi, et al. "Activation imaging of drugs with hybrid Compton camera: A proof-of-concept study." Applied Physics Letters 121, no. 19 (2022): 193701. http://dx.doi.org/10.1063/5.0116570.

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The visualization of drugs is essential for cancer treatment. Although several methods for visualizing drugs have been proposed, a versatile method that can be easily applied to various drugs has not yet been established. Therefore, we propose “activation imaging,” in which a drug is irradiated with thermal neutrons and becomes radioactive, enabling visualization using emitted x rays and/or gamma rays. Activation imaging does not require the conjugation of specific tracers with drugs. Therefore, it can be easily applied to a variety of drugs, drug carriers (e.g., metal nanoparticles), and cont

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12

Akber, Syed F. "The quality factor of x-rays/gamma rays as one is realistic?" Journal of Radiotherapy in Practice 11, no. 3 (2012): 195–97. http://dx.doi.org/10.1017/s1460396912000349.

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AbstractThe quality factor for x-rays, gamma rays and electrons assigned as one need to be revised. It is observed that as the energy decreases, mean lethal radiation dose (Do)decreases as well and become more potent. It is therefore proposed that radiation quality in biological systems should be assessed in the mitotic phase of the cell cycles. Furthermore, based on the mean lethal radiation dose within specific energy range, an appropriate quality factor of x-rays, gamma rays and electrons should be assigned.

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13

Itoh, M., S. Kumagai, T. Shigeyama, K. Nomoto, and J. Nishimura. "Hard X-Rays and Gamma-Rays from SN 1987A." International Astronomical Union Colloquium 108 (1988): 446–47. http://dx.doi.org/10.1017/s0252921100094355.

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Gamma-rays originating from radioactive decays of 56Ni and 56Co and hard X-rays due to Compton degradation of γ-rays have been predicted to emerge when the supernova becomes sufficiently thin. The X-ray detections by Ginga (Dotani et al. 1988) and Kvant (Sunyaev et al. 1988) and more recent report of γ-ray detections by SMM (Matz et al. 1988) were much earlier than the theoretical predictions. (See Itoh et al. 1987 and references therein.)These observations would give important constraints on the distribution of the heavy elements and 56Co in the ejecta. We adopted the hydrodynamical model 11E

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14

White, Richard L., and Wan Chen. "Particle acceleration, X-rays, and gamma-rays from winds." Astrophysics and Space Science 221, no. 1-2 (1994): 295–307. http://dx.doi.org/10.1007/bf01091161.

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15

Steinle, H. "Centaurus A at Hard X-Rays and Soft Gamma-Rays." Publications of the Astronomical Society of Australia 27, no. 4 (2010): 431–38. http://dx.doi.org/10.1071/as09070.

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AbstractCen A, at a distance of less than 4 Mpc, is the nearest radio-loud AGN. Its emission is detected from radio to very-high energy gamma-rays. Despite the fact that Cen A is one of the best studied extragalactic objects the origin of its hard X-ray and soft gamma-ray emission (100 keV <E< 50 MeV) is still uncertain. Observations with high spatial resolution in the adjacent soft X-ray and hard gamma-ray regimes suggest that several distinct components such as a Seyfert-like nucleus, relativistic jets, and even luminous X-ray binaries within Cen A may contribute to the total emission

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16

Katz, Boaz, Nir Sapir та Eli Waxman. "X-rays, γ-rays and neutrinos from collisionless shocks in supernova wind breakouts". Proceedings of the International Astronomical Union 7, S279 (2011): 274–81. http://dx.doi.org/10.1017/s174392131201304x.

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AbstractSome of the observed bursts of X-rays/Gamma-rays associated with supernovae (SNe) as well as very luminous SNe may result from the breakout of the SN shock from an optically thick wind surrounding the progenitor. We show that in such scenarios a collisionless shock necessarily forms during the shock breakout. An intense non-thermal flash of ≲1 MeV gamma rays, hard X-rays and multi-TeV neutrinos is produced simultaneously with and following the typical soft X-ray breakout emission, carrying similar or larger energy than the soft emission. The non-thermal flash is detectable by current X

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17

Cooke, B. A. "X-rays from a gamma-ray repeater?" Nature 366, no. 6454 (1993): 413–14. http://dx.doi.org/10.1038/366413b0.

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18

Wang, Wei-Min, Zheng-Ming Sheng, Paul Gibbon, Li-Ming Chen, Yu-Tong Li, and Jie Zhang. "Collimated ultrabright gamma rays from electron wiggling along a petawatt laser-irradiated wire in the QED regime." Proceedings of the National Academy of Sciences 115, no. 40 (2018): 9911–16. http://dx.doi.org/10.1073/pnas.1809649115.

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Even though high-quality X- and gamma rays with photon energy below mega-electron volt (MeV) are available from large-scale X-ray free electron lasers and synchrotron radiation facilities, it remains a great challenge to generate bright gamma rays over 10 MeV. Recently, gamma rays with energies up to the MeV level were observed in Compton scattering experiments based on laser wakefield accelerators, but the yield efficiency was as low as10−6, owing to low charge of the electron beam. Here, we propose a scheme to efficiently generate gamma rays of hundreds of MeV from submicrometer wires irradi

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19

ELIASSON, BENGT, and CHUAN SHENG LIU. "An electromagnetic gamma-ray free electron laser." Journal of Plasma Physics 79, no. 6 (2013): 995–98. http://dx.doi.org/10.1017/s0022377813000779.

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AbstractWe present a theoretical model for the generation of coherent gamma rays by a free electron laser, where a high-energy electron beam interacts with an electromagnetic wiggler. By replacing the static undulator with a 1-μm laser wiggler, the resulting radiation would go from X-rays currently observed in experiments, to gamma rays. Coherent light in the gamma-ray range would have wide-ranging applications in the probing of matter on sub-atomic scales.

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20

Magdziarz, Paweł, and Andrzej A. Zdziarski. "Angle-dependent Compton reflection of X-rays and gamma-rays." Monthly Notices of the Royal Astronomical Society 273, no. 3 (1995): 837–48. http://dx.doi.org/10.1093/mnras/273.3.837.

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21

Hoflich, P., J. C. Wheeler, and A. Khokhlov. "Hard X‐Rays and Gamma Rays from Type Ia Supernovae." Astrophysical Journal 492, no. 1 (1998): 228–45. http://dx.doi.org/10.1086/305018.

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22

WACHTER, KERRI. "X-Rays, Gamma Rays Added to List of Human Carcinogens." Internal Medicine News 38, no. 7 (2005): 6. http://dx.doi.org/10.1016/s1097-8690(05)70251-1.

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23

WACHTER, KERRI. "X-Rays, Gamma Rays Added to List of Human Carcinogens." Family Practice News 35, no. 6 (2005): 5. http://dx.doi.org/10.1016/s0300-7073(05)70137-7.

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24

Zdziarski, Andrzej A., and Roland Svensson. "Absorption of X-rays and gamma rays at cosmological distances." Astrophysical Journal 344 (September 1989): 551. http://dx.doi.org/10.1086/167826.

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25

McTiernan, James M., and Vahe Petrosian. "The hard X-rays and gamma rays from solar flares." Astrophysical Journal 359 (August 1990): 541. http://dx.doi.org/10.1086/169085.

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26

Cheung, W. M., and K. S. Cheng. "Unpulsed High-Energy Radiation from the Crab Pulsar and Nebula." International Astronomical Union Colloquium 142 (1994): 827–31. http://dx.doi.org/10.1017/s0252921100078167.

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AbstractGenerally, people believe that the unpulsed high-energy gamma rays from the direction of Crab Nebula and pulsar comes from the nebula. But it is entirely possible that the unpulsed high-energy gamma rays from the direction of the Crab Nebula and pulsar are actually emitted from a region extending to a couple of light cylinder radii from the pulsar instead of from the extensive nebula. In this conference paper, we study the possibility that the unpulsed high-energy gamma rays from 100 MeV to 10 GeV are emitted from the extensive nebula. In our model, two pulsed photon beams from two dif

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27

Rieger, E. "Gamma-Ray Precursors of Solar Flares." International Astronomical Union Colloquium 142 (1994): 645–48. http://dx.doi.org/10.1017/s0252921100077927.

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AbstractBursts have been observed by the gamma-ray spectrometer on SMM at medium- and high-energy gamma-rays that precede the flare maximum. The negligible contribution of nuclear lines in the spectra of these events and their impulsive appearance suggests that they are hard-electron-dominated events superposed on the flares. Spatial resolution at gamma-ray energies will be necessary to decide whether this kind of bursts is cospatial with the flares or whether they occur in the flares’ vicinity.Subject headings: Sun: flares — Sun: X-rays, gamma rays

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28

Vaitiekūnas, Petras, and Daiva Lukošiūte. "STUDY OF GAMMA RADIATION FROM BUILDING MATERIALS." JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT 13, no. 4 (2005): 182–86. http://dx.doi.org/10.3846/16486897.2005.9636869.

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People are constantly exposed to ionizing radiation, but generally the amount, type and duration of exposure to radionuclides (radiation emitters) affects the severity or type of health effect. Nearly all rocks, minerals and soil may contain small amounts of naturally occuring radioactive materials, and when they are incorporated into building materials, these naturally occurring radioactive materials are included as well. Ionization is a process in which a charge portion of a molecule is given enough energy to break away atoms. There are three main kinds of ionizing radiation: alpha particles

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29

Brodyn, M. S. "Dual-Energy Semiconductor Detector of X-Rays and Gamma Radiation." Science and innovation 10, no. 2 (2014): 45–49. http://dx.doi.org/10.15407/scine10.02.045.

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30

Kuze, Riku, Shigeo S. Kimura, and Ke Fang. "Multimessenger Emission by Magnetically Arrested Disks and Relativistic Jets of Black Hole X-Ray Binaries." Astrophysical Journal 985, no. 1 (2025): 139. https://doi.org/10.3847/1538-4357/adcc1b.

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Abstract Black hole X-ray binaries (BHXBs) are observed in various wavelengths from radio to GeV gamma rays. Several BHXBs, including MAXI J1820+070 and Cygnus X-1, are also found to emit ultrahigh-energy (UHE; photon energy > 100 TeV) gamma rays. The origin and production mechanism of the multiwavelength emission of BHXBs are under debate. We propose a scenario where relativistic particles from magnetically arrested disks (MADs), which could form when BHXBs are in quiescent or hard states, produce UHE gamma rays, while electrons in the jets produce GeV gamma-ray emission. Specifically, mag

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31

Epstein, Richard I. "Physical Constraints on Models of Gamma-Ray Bursters." International Astronomical Union Colloquium 89 (1986): 305–21. http://dx.doi.org/10.1017/s0252921100086140.

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AbstractThe power per logarithmic bandwidth in gamma-ray burst spectra generally increases rapidly with energy through the x-ray range and does not cut off sharply above a few MeV. This spectral form indicates that a very small fraction of the energy from a gamma-ray burst source is emitted at low energies or is reprocessed into x-rays and that the high-energy gamma rays are not destroyed by photon-photon interactions. The implications are that the emission mechanism for the gamma-ray bursts is not synchrotron radiation from electrons that lose most of their energy before being re-accelerated

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32

Musser, George. "Gamma Rays." Scientific American 301, no. 3 (2009): 94. http://dx.doi.org/10.1038/scientificamerican0909-94b.

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33

May, M. "Hypernuclear gamma rays." Nuclear Physics A 450 (March 1986): 179–88. http://dx.doi.org/10.1016/0375-9474(86)90552-x.

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34

Aim-O, Pawitra, Supat Klinkhieo, Methee Sophon, et al. "Performance of CsI (Tl) photodiode with optic fiber wire for Gamma-rays and X-rays detection." Journal of Physics: Conference Series 2175, no. 1 (2022): 012013. http://dx.doi.org/10.1088/1742-6596/2175/1/012013.

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Abstract In this paper, we explored the feasibility study of using the optic fiber wire to be a light transmitter for crystal scintillation material in the radiation measurement. The high-density material; thallium doped cesium iodide CsI (Tl) are widely used as converters for Gamma-rays and X-rays into visible light. Optic fibers are applied in the various applications such nuclear facilities, future fusion installations, medical treatment and diagnostic premises etc. The major advantages to be considered in optic fibers for radiation detection because their characteristics such as: capacitie

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35

Lin, R. P. "Particle Acceleration by the Sun: Electrons, Hard X-rays/Gamma-rays." Space Science Reviews 124, no. 1-4 (2007): 233–48. http://dx.doi.org/10.1007/s11214-006-9107-9.

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36

Illarionov, Andrei F., and Julian H. Krolik. "Self-Shielding of X-Rays and Gamma Rays in Compact Sources." Astrophysical Journal 469 (October 1996): 698. http://dx.doi.org/10.1086/177816.

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37

Lopes, João Marcos Fávaro, José Vinícius Ribeiro, Avacir Casanova Andrello, and Fábio Luiz Melquiades. "Gamma-rays and X-rays spectrometries applied to evaluate soil redistribution." Journal of Environmental Radioactivity 278 (September 2024): 107479. http://dx.doi.org/10.1016/j.jenvrad.2024.107479.

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38

Madhusudhana, Chandrika B., Seenappa Lakshmaiah, Holaly C. Manjunatha, et al. "Synthesis and characterisation of lead–magnesium–boron nanocomposite for radiation shielding application." Radiation Protection Dosimetry 199, no. 20 (2023): 2419–27. http://dx.doi.org/10.1093/rpd/ncad220.

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Abstract There is a need for the replacement of toxic lead with nontoxic materials in radiation shielding applications. Instead of pure lead, lead mixed compounds/mixtures/alloys are considered to be less toxic and hence preferred for radiation shielding purposes. The compounds with magnesium are said to be having good magnetic and mechanical properties. Meanwhile, the boron element avoids secondary radiation and absorbs neutrons. The compound which is a mixture of lead, magnesium and boron is expected to be a good shielding material for radiation for X-rays/gamma rays. Hence in the present st

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39

Dai, Ben-Zhong. "The X-ray Spectral Properties for Gamma-ray Loud Blazars." Symposium - International Astronomical Union 214 (2003): 299–302. http://dx.doi.org/10.1017/s0074180900194628.

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We selected a sample of bright γ-ray (E>100 MeV) blazars whose X-rays in 0.1–10.0 keV band are observed by ROSAT and other X-ray satellites, and make a detailed spectral analysis between the soft (0.1–2.0 keV) and hard band (2.0–10.0keV) as well as between X-ray and γ-ray properties using both un-weighted and weighted analysis methods. Our results indicate: (i) there are significant anti-correlations of the spectral indices between soft X-rays and γ-rays, and between hard X-ray and γ-ray of flat-spectrum radio quasars (FSRQs) and BL Lac objects; (ii) in the X-ray band, the correlation is co

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40

Malik, Zahoor, Sunder Sahayanathan, Zahir Shah, Naseer Iqbal, Aaqib Manzoor, and Nilay Bhatt. "Model-independent redshift estimation of BL Lac objects through very-high-energy observations." Monthly Notices of the Royal Astronomical Society 511, no. 1 (2022): 994–1003. http://dx.doi.org/10.1093/mnras/stab3173.

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ABSTRACT The very-high-energy (VHE) gamma-ray spectral indices of blazars show a strong correlation with the source redshift. The absence of any such correlation in low-energy gamma-rays and X-rays indicates the presence of extragalactic background light (EBL)-induced absorption of VHE gamma-rays. By employing a linear regression analysis, this observational feature of blazars is used to constrain the redshifts of BL Lac objects that were unknown/uncertain earlier. In addition, we compare the observed VHE spectral index–redshift correlation with those predicted from commonly adopted EBL models

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41

Domański, Grzegorz, Roman Szabatin, Piotr Brzeski, and Bogumił Konarzewski. "NEEDLE DETECTOR OF X-RAY AND GAMMA RADIATION." Informatics Control Measurement in Economy and Environment Protection 7, no. 1 (2017): 121–24. http://dx.doi.org/10.5604/01.3001.0010.4599.

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The article presents the developed structure of the novel needle proportional gas detector (NPC – Needle Proportional Counter) used for the detection of X-rays and gamma rays. The advantage of the detector is its simple mechanical construction and the possibility of detection of incident radiation in a direction parallel to the needle. The measured energy spectrum of the isotope Fe-55 by means of the developed detector is presented.

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42

Bhat, Irfan Ahmad, Umar Jan Pandit, Imtiyaz Ahmad Sheikh, and Zia Ul Hassan. "Physical and Chemical Mutagenesis in Linum usitatissimum L. to Induce Variability in Seed Germination, Survival and Growth rate traits." Current Botany 7 (January 12, 2017): 28. http://dx.doi.org/10.19071/cb.2016.v7.3054.

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The studies of induced mutation in <em>Linum usitatissimum</em> L. were performed by exposing the fully mature and healthy dry seeds to gamma rays at 10 and 15 Kr, X-rays at 10 and 15 Kr, hydroxylamine (HA) at 0.1% and 0.2%, 5-amino acridine (AA) at 0.1% and 0.2% doses. The observations were made for seed germination %, survival % and growth characters such as shoot length, root length and dry weight. Seeds treated with low dose of mutagens showed negligible effect while that with the high dose exhibit significant effects on studied parameters as compared to control. Data obtained

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43

Yamamoto, Seiichi, Hiroshi Watabe, Kohei Nakanishi, et al. "A triple-imaging-modality system for simultaneous measurements of prompt gamma photons, prompt x-rays, and induced positrons during proton beam irradiation." Physics in Medicine & Biology 69, no. 5 (2024): 055012. http://dx.doi.org/10.1088/1361-6560/ad25c6.

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Abstract Objective. Prompt gamma photon, prompt x-ray, and induced positron imaging are possible methods for observing a proton beam’s shape from outside the subject. However, since these three types of images have not been measured simultaneously nor compared using the same subject, their advantages and disadvantages remain unknown for imaging beam shapes in therapy. To clarify these points, we developed a triple-imaging-modality system to simultaneously measure prompt gamma photons, prompt x-rays, and induced positrons during proton beam irradiation to a phantom. Approach. The developed trip

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44

BARSHAY, SAUL, and GEORG KREYERHOFF. "VERY HIGH-ENERGY NEUTRINOS FROM SLOWLY DECAYING, MASSIVE DARK MATTER AS A SOURCE OF EXPLOSIVE ENERGY FOR GAMMA-RAY BURSTS." Modern Physics Letters A 18, no. 07 (2003): 477–89. http://dx.doi.org/10.1142/s0217732303009654.

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We consider a speculative model for gamma-ray bursts (GRB), which predicts that the total kinetic energy in the ejected matter is less than the total energy in the gamma rays. There is also secondary energy in X-rays, which are emitted contemporaneously with the gamma rays. The model suggests that bremsstrahlung and Compton up-scattering by very energetic electrons, are important processes for producing the observed burst radiation. The dynamics naturally allows for the possibility of a moderate degree of beaming of matter and radiation in some gamma-ray bursts. GRB are predicted to have an in

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45

Han, I., and L. Demir. "Angular dependence of L$_{3}$-subshell X-ray emission following photoionisation." Journal of X-Ray Science and Technology: Clinical Applications of Diagnosis and Therapeutics 19, no. 1 (2011): 13–21. http://dx.doi.org/10.3233/xst-2010-027600276.

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L $_{3}$ -subshell alignment of Th and U ionized by 59.5 keV photons has been investigated by evaluating the angular dependence of L $_{i}$ (i=l, α, η, β and γ) X-ray lines. The angular dependence measurements were performed by measuring the fluorescence cross section, σ $_{Li}$ (i=1, η, α, β and γ) and σ $_{Ll}$ /σ $_{L&gamma;}$ , σ $_{L&eta;}$ /σ $_{L&gamma; }$ , σ $_{L&alpha;}$ /σ $_{L&gamma; }$ and σ $_{L&beta;}$ /σ $_{L&gamma;}$ ratios at different angles. It was observed from the measurements that L $_{i}$ (i=l and α) X rays for the L $_{3}$ -subshell depended

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46

Sasaki, Manami. "Multi-Wavelength View of Supernova Remnants." Acta Polytechnica CTU Proceedings 1, no. 1 (2014): 194–99. http://dx.doi.org/10.14311/app.2014.01.0194.

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This contribution gives a very short overview on the emission of supernova remnants and the processes that are responsible for both the thermal and non-thermal origins of the emission, typically observed in radio, X-rays, and up to gamma-rays. We discuss in particular the case of the Galactic SNR CTB 109. As detailed X-ray studies combined with observations in radio have shown, CTB 109 is interacting with a giant molecular cloud complex. The interaction of the SNR shock with dense interstellar clouds is responsible for both the unusual semi-circular morphology of the SNR and the bright X-ray f

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47

DOMAINKO, WILFRIED, DALIBOR NEDBAL, JAMES A. HINTON, and OLIVIER MARTINEAU-HUYNH. "NEW RESULTS FROM H.E.S.S. OBSERVATIONS OF GALAXY CLUSTERS." International Journal of Modern Physics D 18, no. 10 (2009): 1627–31. http://dx.doi.org/10.1142/s021827180901545x.

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Clusters of galaxies are believed to contain a significant population of cosmic rays. From the radio and probably hard X-ray bands it is known that clusters are the spatially most extended emitters of non-thermal radiation in the Universe. Due to their content of cosmic rays, galaxy clusters are also potential sources of VHE (> 100 GeV) gamma rays. Recently, the massive, nearby cluster Abell 85 has been observed with the H.E.S.S. experiment in VHE gamma rays with a very deep exposure as part of an ongoing campaign. No significant gamma-ray signal has been found at the position of the cluste

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48

López, J. A., S. S. Romero González, O. Hernández Rodríguez, J. Holmes, and R. Alarcon. "GEANT4 Study of Proton–Body Interactions." Journal of Nuclear Physics, Material Sciences, Radiation and Applications 8, no. 2 (2021): 121–27. http://dx.doi.org/10.15415/jnp.2021.82015.

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Proton therapy uses a beam of protons to destroy cancer cells. A problem of the method is the determination of what part of the body the protons are hitting during the irradiation. In a previous study we determine that by capturing the gamma rays produced during the irradiation one can determine the location of the proton-body interaction, in this work we investigate if by examining the gamma rays produced it is possible to determine the body part that produced the gamma rays by the proton collision. This study uses GEANT4 computer simulations of interactions of proton-tissue, protonbrain, pro

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Pejovic, Svetlana, Momcilo Pejovic, and Dragan Stojanov. "Application of pMOS dosimeters in low-field mode for radiation dose measurements which could be used in radiotherapy." Nuclear Technology and Radiation Protection 31, no. 4 (2016): 349–55. http://dx.doi.org/10.2298/ntrp1604349p.

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Abstract:

The pMOS dosimeters sensitivity (Tyndall National Institute, Cork, Ireland) to gamma and X-ray irradiation and 2000 h fading at room temperature is presented. The radiation fields were created using a 60Co source for two dose ranges (1-5 Gy and 10-50 Gy) as well as for X-ray units of a 280 kV spectrum for a single dose range from 0.1 to 1 Gy. Irradiation was performed in low-field mode (no gate bias during irradiation, Virr = 0 V), sensitivity characterized by the threshold voltage shift as a function of the absorbed radiation dose and time after irradiation. Linear dependence between the thre

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Davids, Isak, Markus Böttcher, and Michael Backes. "Centaurus A: Hard X-ray and High-Energy Gamma-Ray Light Curve Correlation." Galaxies 7, no. 2 (2019): 44. http://dx.doi.org/10.3390/galaxies7020044.

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Abstract:

Centaurus A, powered by a 55 million solar mass supermassive black hole, has been intensively monitored in all accessible wavelength ranges of the electromagnetic spectrum. However, its very-high energy gamma ( γ ) ray flux (TeV photons), obtained from H.E.S.S. is relatively faint, hampering detailed light curve analyses in the most energetic energy band. Yet, the extensive long-term light curve data from Fermi-LAT and Swift-BAT (hard X-rays) allows for cross-correlation studies. We find a hint that X-ray emission from Centaurus A precedes the γ rays by 25 ± 125 days. If this lag is real and r

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