MEASUREMENT OF THE ~(16)O(n, γ)~(17)O REACTION CROSS SECTION AT STELLAR ENERGY AND THE CRITICAL ROLE OF NONRESONANT p-WAVE NEUTRON CAPTURE

M. IGASHIRA; Y. NAGAI; K. MASUDA; T. OHSAKI; H. KITAZAWA

首页> 外文期刊>The Astrophysical journal >MEASUREMENT OF THE ~(16)O(n, γ)~(17)O REACTION CROSS SECTION AT STELLAR ENERGY AND THE CRITICAL ROLE OF NONRESONANT p-WAVE NEUTRON CAPTURE

【24h】

MEASUREMENT OF THE ~(16)O(n, γ)~(17)O REACTION CROSS SECTION AT STELLAR ENERGY AND THE CRITICAL ROLE OF NONRESONANT p-WAVE NEUTRON CAPTURE

机译：星能下〜（16）O（n，γ）〜（17）O反应截面的测量及非共振p波中子俘获的临界作用

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相似文献
相关主题

摘要

The cross section of the ~(16)O(n, γ)~(17)O reaction, important for nucleosynthesis theories of s and p processes and of inhomogeneous big bang models, has been measured at stellar neutron energy. The Maxwellian-averaged cross section at kT = 30 keV was derived as 34 ± 4 μbarn; 170 times larger than the value reported previously. The results could significantly alter the s and p process efficiencies in metal-deficient stars due to a strong neutron poison of ~(16)O and increase the primordial nucleosynthesis yield in inhomogeneous models. The large cross section is attributed to a nonresonant p-wave neutron-capture process. It is pointed out that this process plays an important role in the neutron-capture reaction of light nuclei at stellar energy; the cross section deviates considerably from the extrapolated value of the measured thermal-capture cross section by assuming a 1/v law and therefore the process significantly influences both the stellar and above-mentioned primordial nucleosynthesis theories.

机译：在恒星中子能量下测量了〜（16）O（n，γ）〜（17）O反应的横截面，这对于s和p过程的核合成理论以及非均质的大爆炸模型都很重要。在kT = 30 keV时的麦克斯韦平均截面为34±4μbarn。比以前报告的值大170倍。结果可能会由于〜（16）O的强中子毒害而显着改变缺金属恒星的s和p过程效率，并增加非均质模型中原始核合成的产率。大横截面归因于非共振p波中子捕获过程。指出这一过程在恒星能量下光核的中子捕获反应中起着重要作用。通过假设1 / v定律，横截面与测得的热捕获横截面的外推值有很大的出入，因此该过程显着影响了恒星和上述原始核合成理论。

著录项

来源
《The Astrophysical journal》 |1995年第2pt2期|p. L89-L92|共4页
作者
M. IGASHIRA; Y. NAGAI; K. MASUDA; T. OHSAKI; H. KITAZAWA;
展开▼
作者单位

展开▼
收录信息
原文格式 PDF
正文语种 eng
中图分类天文学;
关键词

相似文献

外文文献
中文文献
专利

1. MEASUREMENT OF THE ~(16)O(n, γ)~(17)O REACTION CROSS SECTION AT STELLAR ENERGY AND THE CRITICAL ROLE OF NONRESONANT p-WAVE NEUTRON CAPTURE [J] . M. IGASHIRA, Y. NAGAI, K. MASUDA, The Astrophysical journal . 1995,第2Pt2期

机译：星能下〜（16）O（n，γ）〜（17）O反应截面的测量及非共振p波中子俘获的临界作用
2. Measurements of activation cross-sections for the ~(19)F(n, α)~(16)N reaction for neutrons with energies between 13 and 15 MeV [J] . Ayse Durusoy, Iskender Atilla Reyhancan Annals of nuclear energy . 2006,第2期

机译：能量在13到15 MeV之间的中子〜（19）F（n，α）〜（16）N反应的活化截面的测量
3. Measurements of the cross sections of the ~(186)W(n,γ )~(187)W, ~(182)W(n, p)~(182)Ta, ~(154)Gd(n,2n)~(153)Gd, and ~ (160)Gd(n,2n)~(159)Gd reactions at neutron energies of 5 to 17 MeV [J] . Rajnikant Makwana, S. Mukherjee, P. Mishra, Physical Review C . 2017,第期

机译：测量〜（186）W（n，γ）〜（187）W，〜（182）W（n，p）〜（182）ta，〜（154）gd（n，2n）〜的横截面测量（153）GD，〜（160）GD（N，2N）〜（159）中子能量的GD反应为5至17 meV
4. High-Resolution Neutron Capture and Total Cross Section Measurements for ~(192,194,195,196)Pt and the Astrophysical Rates for the ~(192,194,195,196)Pt(n,γ) Reactions [C] . P. E. Koehler, J. A. Harvey, K. H. Guber, International Conference on Nuclear Data for Science and Technology . 2002

机译：高分高中中子捕获和总横截面测量〜（192,194,195,196）Pt和天体物理率为〜（192,194,195,196）Pt（n，γ）反应
5. Radiation dose measurements and Monte Carlo calculations for neutron and photon reactions in a human head phantom for accelerator-based boron neutron capture therapy. [D] . Kim, Don-Soo. 2004

机译：用于基于加速器的硼中子捕获疗法的人头幻像中的中子和光子反应的辐射剂量测量和蒙特卡洛计算。
6. Responses of Total and Quiescent Cell Populations in Solid Tumors to Boron and Gadolinium Neutron Capture Reaction Using Neutrons with Two Different Energy Spectra [O] . Shin‐ichiro Masunaga, Koji Ono, Yoshinori Sakurai, 1998

机译：使用两种不同能谱的中子对固体肿瘤中总细胞和静止细胞群体对硼和d中子俘获反应的响应
7. RE-EVALUATION OF THE16O(N,γ)17O CROSS SECTION AT ASTROPHYSICAL ENERGIES AND ITS ROLE AS A NEUTRON POISON IN THEs-PROCESS [O] . Peter Mohr, Christian Heinz, Marco Pignatari, 2016

机译：在Astrophysical Inergies中的160（n，γ）17o横截面的重新评估及其作为中子毒物的作用

MEASUREMENT OF THE ~(16)O(n, γ)~(17)O REACTION CROSS SECTION AT STELLAR ENERGY AND THE CRITICAL ROLE OF NONRESONANT p-WAVE NEUTRON CAPTURE

摘要

著录项

相似文献

相关主题

期刊订阅