Investigation of 54Fe(n,γ)55Fe and 35Cl(n, γ)36Cl reaction cross sections at keV energies by Accelerator Mass Spectrometry
Investigation of 54Fe(n,γ)55Fe and 35Cl(n, γ)36Cl reaction cross sections at keV energies by Accelerator Mass Spectrometry
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通过加速器质谱法研究 keV 能量下的 54Fe(n,γ)55Fe 和 35Cl(n,γ)36Cl 反应截面
DOI:
10.1051/epjconf/202023202005
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Weigand
中科院分区:
文献类型:
--
作者:
Zuzana Slavkovská;Anton Wallner;René Reifarth;Stefan Pavetich;Lukas Bott;Benjamin Brückner;Kathrin Göbel;Kafa Al-Khasawneh;Dominik Koll;Silke Merchel;Markus Reich;Meiko Volknandt;Weigand
Activations with neutrons in the keV energy range were routinely performed at the Karlsruhe Institute of Technology (KIT) in Germany in order to simulate stellar conditions for neutron-capture cross sections. A quasi-Maxwell-Boltzmann neutron spectrum ofkT= 25 keV, being of interest for the astrophysical s-process, was produced by the7Li(p,n) reaction utilizing a 1912 keV proton beam at the Karlsruhe Van de Graaff accelerator. Activated samples resulting in long-lived nuclear reaction products with half-lives in the order of yr 100 Myr were analyzed by Accelerator Mass Spectrometry (AMS). Comparison of the obtained reaction cross sections to literature data from previous Time-of-Flight (ToF) measurements showed that the selected AMS data are systematically lower than the ToF data. To investigate this discrepancy,54Fe(n,γ)55Fe and35Cl(n,γ)36Cl reaction cross sections were newly measured at the Frankfurt Neutron Source (FRANZ) in Germany. To complement the existing data, an additional neutron activation of54Fe and35Cl at a proton energy of 2 MeV was performed. The results will give implications for the stellar environment atkT= 90 keV, reaching the not yet experimentally explored high-energy s-process range. AMS measurements of the activated samples are scheduled.
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DOI:
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发表时间:
1976
期刊:
影响因子:
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作者:
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DOI:
10.1140/epjp/i2018-12295-3
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2018-10
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The European Physical Journal Plus
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3.1
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