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A new study for O-16(gamma,alpha)C-12 at the energies of nuclear astrophysics interest: The inverse of key nucleosynthesis reaction C-12(alpha,gamma)O-16
Xu, Y(徐毅); Xu, W(徐望); Ma, YG(马余刚); Guo, W(郭威); Chen, JG; Cai, XZ(蔡翔舟); Wang, HW; Wang, CB; Lu, GC; Shen, WQ(沈文庆); Xu, W (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
2007
Source PublicationNUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN0168-9002
Volume581Issue:3Pages:866
AbstractThe key reaction C-12(alpha, gamma)O-16 in nuclear astrophysics is difficult to be performed experimentally at low energy because of the Coulomb barrier. But it is different if we use its inverse reaction O-16(gamma, alpha)C-12 because the cross-section of O-16(gamma, alpha)C-12 is almost 100 times larger than the cross-section of C-12(alpha, gamma)O-16 at the same center of mass energy (E-c.m.) based on our study. In the present work, we study the angular distributions and total cross-sections of O-16(gamma, alpha)C-12 which are induced by polarized photon using the resonance theory of low energy reaction. The differential cross-sections as well as E1 and E2 transition cross-sections at low nuclear astrophysics energies are also calculated. The feature of the future Shanghai Laser Electron Gamma Source (SLEGS) facility, a low energy gamma-ray beam line with a high photon flux, is presented. The experiments of O-16(gamma, alpha)C-12 are simulated with a time projection chamber (TPC) and a realistic SLEGS layout. The lowest (E-c.m.), which can be obtained from the simulation, is 0.8 MeV with the 20-30% uncertainty for the one-month beam time of SLEGS. The extracted S factors of C-12(alpha, gamma)O-16 and their statistical uncertainties from the simulation are compared with the existing data and some theoretical calculations. It is shown that the promising O-16(gamma, alpha)C-12 experiment at SLEGS can largely reduce the statistical uncertainties of the C-12(alpha, gamma)O-16 experiment at low energies. (c) 2007 Elsevier B.V. All rights reserved.
Subject AreaPhysics
Indexed BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000251148000033
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/7636
Collection中科院上海应用物理研究所2004-2010年
Corresponding AuthorXu, W (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
Recommended Citation
GB/T 7714
Xu, Y,Xu, W,Ma, YG,et al. A new study for O-16(gamma,alpha)C-12 at the energies of nuclear astrophysics interest: The inverse of key nucleosynthesis reaction C-12(alpha,gamma)O-16[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,2007,581(3):866.
APA Xu, Y.,Xu, W.,Ma, YG.,Guo, W.,Chen, JG.,...&Xu, W .(2007).A new study for O-16(gamma,alpha)C-12 at the energies of nuclear astrophysics interest: The inverse of key nucleosynthesis reaction C-12(alpha,gamma)O-16.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT,581(3),866.
MLA Xu, Y,et al."A new study for O-16(gamma,alpha)C-12 at the energies of nuclear astrophysics interest: The inverse of key nucleosynthesis reaction C-12(alpha,gamma)O-16".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 581.3(2007):866.
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