Properties of fluorine targets and their application on the astrophysically important F-19(p, alpha)O-16 reaction | |
Zhang, Liyong1; Xu, Shiwei2,3![]() ![]() ![]() ![]() ![]() ![]() | |
刊名 | NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
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2019-01 | |
卷号 | 438页码:48-53 |
关键词 | Evaporated targets Implanted targets Target deterioration Nuclear astrophysics |
ISSN号 | 0168-583X |
DOI | 10.1016/j.nimb.2018.10.024 |
英文摘要 | We report on the production and testing of both evaporated and implanted fluorine targets to investigate their stability to irradiation by protons. We produced four targets by evaporating CaF2 and LiF powder on Ta backings and three targets by implanting 30 keV F-19 ions into stainless steel backings; a 5 mu g/cm(2) Cr protective layer was also evaporated on one of these implanted targets. We assessed each target's stability by monitoring the gamma-ray yields of the F-19(p, alpha(gamma))O-16 reaction. Our results indicate that the evaporated and implanted targets without Cr layer exhibited 30%similar to 75% and 13% deterioration after similar to 2.5 Coulomb/cm(2), 220-270 keV proton bombardment, respectively. The implanted target with protecting layer exhibited only about 2.5% deterioration, which can be regarded as stable. As we observed stability in one of the CaF2 evaporated targets up to 0.25 Coulomb/cm(2) irradiation, this target was used to investigate the two resonances at E-p = 225 and 237 keV of the F-19(p, alpha(gamma))O-16 reaction; the resonance parameters we extracted are consistent with the values found in the literature, giving us confidence in our analysis methods and our understanding of the target fabrication procedures described herein. In conclusion, the implantation technique provides a unique means to produce fluorine targets capable of withstanding high beam intensities, which is one of the necessary technical developments for the JUNA (Jinping Underground Nuclear Astrophysics) project in China. |
资助项目 | National Key Research and Development Program of China[2016YFA0400503] |
WOS研究方向 | Instruments & Instrumentation ; Nuclear Science & Technology ; Physics |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000453491500010 |
内容类型 | 期刊论文 |
源URL | [http://119.78.100.186/handle/113462/64473] ![]() |
专题 | 中国科学院近代物理研究所 |
通讯作者 | Xu, Shiwei; He, Jianjun |
作者单位 | 1.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Shandong Univ Weihai, Sch Space Sci & Phys, Weihai 264209, Peoples R China 5.China Inst Atom Energy, Beijing 102413, Peoples R China |
推荐引用方式 GB/T 7714 | Zhang, Liyong,Xu, Shiwei,He, Jianjun,et al. Properties of fluorine targets and their application on the astrophysically important F-19(p, alpha)O-16 reaction[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,2019,438:48-53. |
APA | Zhang, Liyong.,Xu, Shiwei.,He, Jianjun.,Wang, Shuo.,Chen, Han.,...&Liu, Weiping.(2019).Properties of fluorine targets and their application on the astrophysically important F-19(p, alpha)O-16 reaction.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,438,48-53. |
MLA | Zhang, Liyong,et al."Properties of fluorine targets and their application on the astrophysically important F-19(p, alpha)O-16 reaction".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 438(2019):48-53. |
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