Journal ArticleDOI
Fragmentation cross-section of 600 A MeV Si14+ ions in thick polyethylene target
Renu Gupta,Ashavani Kumar +1 more
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In this paper, the total and partial charge-changing crosssections of 600 A MeV Si14+ ions in a thick polyethylene target were measured by CR39 track etch detectors using an optical microscope DM 6000 M system installed with Leica QWin Plus software.Abstract:
Total and partial charge-changing cross-sections of 600 A MeV Si14+ ions in a thick polyethylene target were measured by CR39 track etch detectors using an optical microscope DM 6000 M system installed with Leica QWin Plus software. The CR39 nuclear track detectors were used to identify the incident charged particles and their fragments using the cone-height distribution method. The charge resolution of CR39 detectors was achieved to be 0.17e in the present condition. The value of the total charge-changing cross-section was calculated to be σ
tot
= (766±17) mb. To calculate the partial charge-changing cross-sections for ΔZ = −11, −10, ..., −1, , number of events corresponding to each fragment were determined from multiple Gaussian fitting of cone-height distributions within 95.5% confidence level and the number of incident and survived beam ions were counted within 99.7% confidence level. Possible odd-even pattern in the values of the partial charge-changing cross-section is also presented. The measured charge pick-up cross-section for ΔZ = +1 is (7.2 ±1.7) mb.read more
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Dissertation
Various Aspects of Astroparticle Physics and the Implications for Dark Matter Searches
TL;DR: In the absence of an anomaly, the authors in this paper derived limits on the dark matter annihilation cross section that disfavor thermal WIMPs below roughly 500 GeV, which is consistent with the astrophysical background prediction, if energy losses are not relevant.
Journal ArticleDOI
Total nuclear reaction cross-section database for radiation protection in space and heavy-ion therapy applications
Francesca Luoni,Felix Horst,C.-A. Reidel,A. Quarz,L. Bagnale,Lembit Sihver,Lembit Sihver,Uli Weber,Ryan B. Norman,W. C. de Wet,Martina Giraudo,Giovanni Santin,John W. Norbury,Marco Durante +13 more
TL;DR: In this article, a collection of total nuclear reaction cross-section data has been generated within a GSI-ESA-NASA collaboration, which includes the experimentally measured total nucleus-nucleus reaction crosssections.
Journal ArticleDOI
Fragmentation cross sections of 788A MeV 28Si on carbon and polyethylene targets
TL;DR: In this paper, the total charge-changing cross sections and the partial cross sections of silicon ions on carbon and polyethylene targets are studied at 788-A MeV by using CR-39 plastic nuclear track detectors.
Journal ArticleDOI
Projectile Fragment Emission in the Fragmentation of Silicon on Carbon and Polyethylene Targets at 800 A MeV
Zhen Feng,Hui-Hui Ao,Ya-Qin Sun,Man-Man Tian,Dong-Hai Zhang,Jun-Sheng Li,Satoshi Kodaira,N. Yasuda +7 more
TL;DR: In this article, the angular and transverse momentum distributions of PFs produced in fragmentation of silicon on carbon and polyethylene targets at 800 A MeV were measured, and it was found that the angular distribution of PF does not depend on the mass of the target nucleus, and the averaged emission angle and transversal momentum decrease with increase of the charge of PF for the same target.
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TL;DR: In this article, the authors present the final results obtained by the MACRO experiment in the search for GUT magnetic monopoles in the penetrating cosmic radiation, for the range 4×10 −5 <β < 1.
Journal ArticleDOI
Badhwar–O'Neill 2010 Galactic Cosmic Ray Flux Model—Revised
TL;DR: The Badhwar-O'Neill galactic cosmic ray (GCR) model has been revised to model all balloon and satellite GCR measurements since 1955 as discussed by the authors, including the newer 1997-2010 Advanced Composition Explorer (ACE) measurements and spans six solar cycles.
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