Neutron capture cross section of /sup 159/Tb from 2. 6 to 700 keV
Neutron capture cross section of /sup 159/Tb from 2. 6 to 700 keV
复制标题
/sup 159/Tb 的中子俘获截面从 2. 6 到 700 keV
DOI：
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发表时间：
1978
期刊：
影响因子：
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通讯作者：
J. Halperin
中科院分区：
文献类型：
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作者：
M. Mizumoto;R. Macklin;J. Halperin
$^{159}mathrm{Tb}(n,ensuremath{gamma})$ 横截面是使用中子飞行时间设备测量的。平均捕获截面从 2.6 到 700 keV 推算出来，并与最近报告的传输结果相结合，与能量无关的强度函数很好地拟合。许多观察到的 2.6 至 3.4 keV 峰的共振参数是通过非线性最小二乘拟合程序确定的。测量了平均捕获的 $ensuremath{gamma}$ 射线多重性，给出了相对较低的值，在 4 keV 处为 2.45 ifmmodepmelse extpmfi{} 0.01，这意味着两步级联的比例很高。分析了由强度函数计算得到的截面的波动情况。横截面中没有显示出明显的非随机结构。
The $^{159}mathrm{Tb}(n,ensuremath{gamma})$ cross section was measured using a neutron time of flight facility. The average capture cross section was deduced from 2.6 to 700 keV and in combination with recently reported transmission results, was well fitted with energy independent strength functions. Resonance parameters for many of the observed peaks from 2.6 to 3.4 keV were determined by a nonlinear least squares fitting program. The $ensuremath{gamma}$-ray multiplicity for average capture was measured, giving the relatively low value, 2.45 ifmmodepmelse extpmfi{} 0.01 at 4 keV, implying a high proportion of two-step cascades. The fluctuations in the cross section about that computed from strength functions were analyzed. No significant nonrandom structure in the cross section was indicated.