β-decay half-lives of very neutron-rich Kr to Tc isotopes on the boundary of the r-process path: an indication of fast r-matter flow.
β-decay half-lives of very neutron-rich Kr to Tc isotopes on the boundary of the r-process path: an indication of fast r-matter flow.
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DOI：
10.1103/physrevlett.106.052502
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发表时间：
2011-02
影响因子：
8.6
通讯作者：
S. Nishimura;Z. Li;H. Watanabe;K. Yoshinaga;T. Sumikama;T. Tachibana;K. Yamaguchi;M. Kurata-Nishimura-M.-Kurata
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文献类型：
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作者：
S. Nishimura;Z. Li;H. Watanabe;K. Yoshinaga;T. Sumikama;T. Tachibana;K. Yamaguchi;M. Kurata-Nishimura-M.-Kurata
测量了从（36）Kr到（43）Tc的38种丰中子同位素的β衰变半衰期，并报道了（100）Kr，（103-105）Sr，（106-108）Y，（108-110）Zr，（111，112）Nb，（112-115）Mo和（116，117）Tc的β衰变半衰期。与以前的标准模型相比，结果表明，在A-110区域，预测半衰期被高估了2倍或更多。基于第二代β衰变总理论的修正模型更好地预测了测得的半衰期，并表明快速中子捕获过程（r物质流）通过该区域的速度比以前预测的更快。
The β-decay half-lives of 38 neutron-rich isotopes from (36)Kr to (43)Tc have been measured; the half-lives of (100)Kr, (103-105)Sr, (106-108)Y, (108-110)Zr, (111,112)Nb, (112-115)Mo, and (116,117)Tc are reported here. The results when compared with previous standard models indicate an overestimation in the predicted half-lives by a factor of 2 or more in the A≈110 region. A revised model based on the second generation gross theory of β decay better predicts the measured half-lives and suggests a more rapid flow of the rapid neutron-capture process (r-matter flow) through this region than previously predicted.