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arXiv 1203.0958nucl-ex
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超过$^{132}$ Sn的精密质量测量:binding energies奇偶交错的异常行为

Precision Mass Measurements beyond $^{132}$Sn: Anomalous behaviour of odd-even staggering of binding energies

J. Hakala, J. Dobaczewski, D. Gorelov, T. Eronen, A. Jokinen, A. Kankainen, V. S. Kolhinen, M. Kortelainen, I. D. Moore, H. Penttilä, S. Rinta-Antila, J. Rissan… 展开作者

J. Hakala, J. Dobaczewski, D. Gorelov, T. Eronen, A. Jokinen, A. Kankainen, V. S. Kolhinen, M. Kortelainen, I. D. Moore, H. Penttilä, S. Rinta-Antila, J. Rissanen, A. Saastamoinen, V. Sonnenschein, J. Äystö

摘要:

使用潘宁阱质谱仪JYFLTRAP以高精度(10 ppb)测量了丰中子同位素$^{121-128}$ Cd、$^{129,131}$ In、$^{130-135}$ Sn、$^{131-136}$ Sb和$^{132-140}$ Te的原子质量。其中,首次测量了四个r过程核$^{135}$ Sn、$^{136}$ Sb和$^{139,140}$ Te的质量。数据揭示了在$Z$ =50处的强$N$ =82壳间隙,但表明了$Z>50$的相关性的重要性。经验中子配对间隙表示为同位素质量的奇偶交错,显示出Sn在$N$ =82处的强烈猝灭,$Z$依赖性是当前理论模型无法解释的。

英文摘要:

Atomic masses of the neutron-rich isotopes $^{121-128}$Cd, $^{129,131}$In, $^{130-135}$Sn, $^{131-136}$Sb, and $^{132-140}$Te have been measured with high precision (10 ppb) using the Penning trap mass spectrometer JYFLTRAP. Among these, the masses of four r-process nuclei $^{135}$Sn, $^{136}$Sb, and $^{139,140}$Te were measured for the first time. The data reveals a strong $N$=82 shell gap at $Z$=50 but indicates the importance of correlations for $Z>50$. An empirical neutron pairing gap expressed as the odd-even staggering of isotopic masses shows a strong quenching across $N$=82 for Sn, with the $Z$-dependence that is unexplainable by the current theoretical models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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