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首页> 外文期刊>Physical review, C >Investigation of Re-186 via radiative thermal-neutron capture on Re-185
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Investigation of Re-186 via radiative thermal-neutron capture on Re-185

机译：RE-185上通过辐射热 - 中子捕获对RE-186的研究

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Partial gamma-ray production cross sections and the total radiative thermal-neutron capture cross section for the Re-185(n,gamma) Re-186 reaction were measured using the Prompt Gamma Activation Analysis facility at the Budapest Research Reactor with an enriched Re-185 target. The Re-186 cross sections were standardized using well-known Cl-35(n,gamma) Cl-36 cross sections from irradiation of a stoichiometric (ReCl3)-Re-nat target. The resulting cross sections for transitions feeding the Re-186 ground state from low-lying levels below a cutoff energy of E-c = 746 keV were combined with a modeled probability of ground-state feeding from levels above E-c to arrive at a total cross section of sigma(0) = 111(6) b for radiative thermal-neutron capture on Re-185. A comparison of modeled discrete-level populations with measured transition intensities led to proposed revisions for seven tentative spin-parity assignments in the adopted level scheme for Re-186. Additionally, 102 primary gamma rays were measured, including 50 previously unknown. A neutron-separation energy of S-n = 6179.59(5) keV was determined from a global least-squares fit of the measured gamma-ray energies to the known Re-186 decay scheme. The total capture cross section and separation energy results are comparable to earlier measurements of these values.
机译：使用Judapest研究反应堆的促进伽马激活分析设施测量部分伽马射线产生横截面和用于RE-185（N，GAMMA）RE-186反应的总辐射热 - 中子捕获横截面。 185个目标。使用来自化学计量（RECL3）-RE-NAT靶的辐射的众所周知的Cl-35（N，γ）Cl-36横截面，标准化RE-186横截面。从EC = 746keV的截止能量低于低于EC = 746keV的低位水平馈送RE-186接地状态的转变的横截面与EC高于EC的水平的地面馈送的建模概率结合到达Sigma（0）= 111（6）B用于RE-185上的辐射热中子捕获。测量过渡强度的模型离散级别群体的比较导致了在RE-186采用的级别方案中的七个初步自旋奇偶诊断分配的提出修订。另外，测量了102个主要伽马射线，包括50前面未知。根据已知的RE-186腐烂方案，从全球最小二乘拟合测定S-N = 6179.59（5）keV的中子分离能量。总捕获横截面和分离能量结果与这些值的早期测量相当。

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