Investigation of the 7Li(p,n) neutron fields at high energies

Investigation of the 7Li(p,n) neutron fields at high energies
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高能 7Li(p,n) 中子场的研究

DOI:
10.1088/1742-6596/1668/1/012003
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发表时间:
2020
期刊:
Journal of Physics: Conference Series
影响因子:
--
通讯作者:
M. Volknandt
M. Volknandt
中科院分区:
--
文献类型:
--
作者:
B. Brückner;P. Erbacher;K. Göbel;T. Heftrich;K. Khasawneh;D. Kurtulgil;C. Langer;R. Nolte;M. Reich;R. Reifarth;M. Weigand;M. Wiescher;M. Volknandt

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中子活化法已被证明是一个非常合适的工具,用于调查的中子俘获截面相关的主要组成部分的s-过程。通过7 Li(p,n)7 Be反应产生的质子能量为Ep = 1912 keV的中子可以用来重建准恒星中子能量分布,模拟k B T= 25 keV的天体物理s过程。对于弱s过程,这发生在大质量恒星的温度之间的k B T= 25 keV和k B T= 90 keV,激活方法尚未成功地重建准恒星中子谱。然而,模拟表明,活化方法可以改进,以重建不同能量的不同中子谱的线性组合的准恒星中子谱。为了验证这些模拟的反应的中子场必须在不同的质子能量测量。
The neutron activation method has been proven to be a well-suited tool for the investigation of neutron capture cross sections relevant for the main component of the s-process. Neutrons produced via the 7 Li (p, n) 7 Be reaction at a proton energy of E p= 1912 keV can be used to recreate a quasi-stellar neutron energy distribution mimicking the astrophysical s-process scenario at k B T= 25keV. For the weak s-process, which takes place in massive stars at temperatures between k B T= 25 keV and k B T= 90 keV, the activation method has not yet been successful in recreating quasi-stellar neutron spectra. However, simulations show that the activation method can be improved in order to recreate a quasi-stellar neutron spectrum at different energies by linear combination of different neutron spectra. In order to verify these simulations the neutron fields of the reaction have to be measured at different proton energies.
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发表时间: 2018-10
期刊: The European Physical Journal Plus
影响因子: --
作者:
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