论文标题
$^{239} \ mathrm {pu}（n，\ mathrm {f}）$之间的能量与$γ$ -Ray排放之间的相关性
Correlations between energy and $γ$-ray emission in $^{239}\mathrm{Pu}(n,\mathrm{f})$
论文作者
论文摘要
我们在$^{239} \ mathrm {pu}（n，\ mathrm {f}）$上进行$^{239} \ Mathrm {pu}）$研究$γ$ - ray排放，这是$ 2 <e_i <40 $ meV的事件中子能量范围。我们提供了第一个实验证据，证明裂变中产生的总角动量与化合物核的激发能之间的正相关。 $γ$ -Ray多样性在2 \ textSuperscript {nd} -Chance裂变阈值下方的入射能量呈线性增加，斜率为$ 0.085 \ pm 0.010 $ MEV $^{ - 1} $。对于$ 9 <\ langle e_x \ rangle <19 $ meV，这种线性趋势似乎可以保持化合物核的平均激发能。大部分多样性增加来自$γ$ ray的能量为0.7 meV的增强，我们将其解释为拉伸四极杆$γ$射线，这表明具有激发能量的总裂变 - 裂变角度动量的增加。
We study $γ$-ray emission following $^{239}\mathrm{Pu}(n,\mathrm{f})$ over an incident neutron energy range of $2 < E_i < 40$ MeV. We present the first experimental evidence for positive correlations between the total angular momentum generated in fission and the excitation energy of the compound nucleus prior to fission. The $γ$-ray multiplicity increases linearly with incident energy below the 2\textsuperscript{nd}-chance fission threshold with a slope of $0.085 \pm 0.010$ MeV$^{-1}$. This linear trend appears to hold for the average excitation energy of the compound nucleus between $9 < \langle E_x \rangle < 19$ MeV. Most of the multiplicity increase comes from an enhancement around a $γ$-ray energy of 0.7 MeV, which we interpret as stretched quadrupole $γ$ rays that indicate an increase in total fission-fragment angular momentum with excitation energy.
