Neutron charge radius determined from the energy dependence of the neutron transmission of liquid 208 Pb and 209 Bi
Neutron charge radius determined from the energy dependence of the neutron transmission of liquid 208 Pb and 209 Bi
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根据液体 208 Pb 和 209 Bi 中子传输的能量依赖性确定的中子电荷半径
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
S. Steiner
中科院分区：
文献类型：
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作者：
S. Kopecky;J. Harvey;N. W. Hill;M. Krenn;M. Pernicka;P. Riehs;S. Steiner
对中子电荷半径的ORELA实验进行了重新评价。用中子飞行时间法测定了液体致胸Pb在0.08 ~ 800ev中子能量范围内的中子透射率。对液态Bi和液态Pb的凝聚态效应的进一步研究提供了更精确的修正，使得中子-电子散射长度b{sub ne}的系统不确定度更小。我们还重新评估了Melkonian及其同事的液体Bi的传播数据。我们得到了b{sub ne}=({minus}1.33{plus_minus}0.027{plus_minus}0.03){times}10{sup {minus}3}fm对于{sup 208} Pb和b{sub ne}=({minus}1.44{plus_minus}0.033{plus_minus}0.06){times}10{sup {minus}3}fm对于{sup 209} Bi，这两个结果的两个不确定性分别表示统计不确定性和系统不确定性。对{sup 208}Pb和{sup 209}Bi的测定结果一致。{版权所有}{ital 1997} {ital美国物理学会}
The ORELA experiment on the neutron charge radius has been reevaluated. The neutron transmission of liquid thorogenic {sup 208} Pb with the neutron time-of-flight method in the neutron energy range from 0.08 to 800 eV was measured. Additional studies on condensed matter effects for liquid Bi and liquid Pb have provided more accurate corrections resulting in smaller systematic uncertainties for the neutron-electron scattering length b{sub ne}. We have also reevaluated the transmission data on liquid Bi of Melkonian and co-workers. We have obtained values of b{sub ne}=({minus}1.33{plus_minus}0.027{plus_minus}0.03){times}10{sup {minus}3 }fm for {sup 208} Pb and b{sub ne}=({minus}1.44{plus_minus}0.033{plus_minus}0.06){times}10{sup {minus}3}fm for {sup 209} Bi where for both results the two uncertainties denote the statistical and the systematic uncertainty, respectively. The results for {sup 208}Pb and {sup 209}Bi were found to be in good agreement. {copyright} {ital 1997} {ital The American Physical Society}