标题： 限制自旋范围在奥斯陆方法中的影响：(d,p)$^{240}\mathrm{Pu}$的例子 显示英文标题

标题： Impact of restricted spin-ranges in the Oslo Method: The example of (d,p)$^{240}\mathrm{Pu}$

摘要： 在本文中，我们首次系统分析了填充自旋分布与本征自旋分布对核能级密度和通过奥斯陆方法获得的$\gamma$-射线强度函数的影响。 我们通过使用在奥斯陆回旋加速器实验室进行的12 MeV氘核束，说明自旋分布对最近进行的$^{239}\mathrm{Pu}$(d,p$\gamma$)$^{240}\mathrm{Pu}$实验的影响。 在分析中，我们将最先进的填充自旋分布计算与蒙特卡罗核衰变代码 RAINIER 相结合，以将奥斯陆方法的结果与已知输入进行比较。 我们发现对填充自旋分布的良好了解是至关重要的，并且表明填充分布对提取核态密度和$\gamma$-ray 强度函数在$^{239}\mathrm{Pu}$(d,p$\gamma$)$^{240}\mathrm{Pu}$情况下的影响显著。 显示英文摘要

摘要： In this paper we present the first systematic analysis of the impact of the populated vs. intrinsic spin distribution on the nuclear level density and $\gamma$-ray strength function retrieved through the Oslo Method. We illustrate the effect of the spin distribution on the recently performed $^{239}\mathrm{Pu}$(d,p$\gamma$)$^{240}\mathrm{Pu}$ experiment using a 12 MeV deuteron beam performed at the Oslo Cyclotron Lab. In the analysis we couple state-of-the-art calculations for the populated spin-distributions with the Monte-Carlo nuclear decay code RAINIER to compare Oslo Method results to the known input. We find that good knowledge of the populated spin distribution is crucial and show that the populated distribution has a significant impact on the extracted nuclear level density and $\gamma$-ray strength function for the $^{239}\mathrm{Pu}$(d,p$\gamma$)$^{240}\mathrm{Pu}$ case.