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arXiv 1508.06207nucl-ex
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58;60;62; 64 Mn基态和同分异构体的自旋和磁矩

Spins and magnetic moments of 58;60;62;64Mn ground states and isomers

H. Heylen, C. Babcock, J. Billowes, M. L. Bissell, K. Blaum, P. Campbell, B. Cheal, R. F. Garcia Ruiz, Ch. Geppert, W. Gins, M. Kowalska, K. Kreim, S. M. Lenzi,… 展开作者

H. Heylen, C. Babcock, J. Billowes, M. L. Bissell, K. Blaum, P. Campbell, B. Cheal, R. F. Garcia Ruiz, Ch. Geppert, W. Gins, M. Kowalska, K. Kreim, S. M. Lenzi, I. D. Moore, R. Neugart, G. Neyens, W. Nörtershäuser, J. Papuga, D. T. Yordanov

摘要:

在欧洲核子研究中心的ISOLDE上,用聚束共线激光光谱法研究了54;56;58;60;62; 64 Mn(Z = 25)的奇-奇同位素。从测得的超精细谱中提取了N = 39以下Mn同位素的自旋和磁矩。先前对58;60;62; 64 Mn的初步基态自旋分配现在被确定为I = 1,同时对58;60; 62 Mn的同分异构态分配为I = 4。I = 1的磁矩随中子数的增加而减小,而I = 4的磁矩在N = 33 ~ 37之间基本不变。将结果与使用GXPF 1A和Lebron有效相互作用的大规模壳模型计算进行比较。基态矩与Lebron计算预测的良好一致性说明,从N = 37开始,在基态波函数中,需要增加Z = 28的质子激发和N = 40的中子激发。

英文摘要:

The odd-odd 54;56;58;60;62;64Mn isotopes (Z = 25) were studied using bunched-beam collinear laser spectroscopy at ISOLDE, CERN. From the measured hyperfine spectra the spins and magnetic moments of Mn isotopes up to N = 39 were extracted. The previous tentative ground state spin assignments of 58;60;62;64Mn are now firmly determined to be I = 1 along with an I = 4 assignment for the isomeric states in 58;60;62Mn. The I = 1 magnetic moments show a decreasing trend with increasing neutron number while the I = 4 moments remain quite constant between N = 33 and N = 37. The results are compared to large-scale shell-model calculations using the GXPF1A and LNPS effective interactions. The excellent agreement of the ground state moments with the predictions from the LNPS calculations illustrates the need for an increasing amount of proton excitations across Z = 28 and neutron excitations across N = 40 in the ground state wave functions from N = 37 onwards.

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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