Lowest excitations in 56Ti and the predicted N=34 shell closure.
Lowest excitations in 56Ti and the predicted N=34 shell closure.
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DOI：
10.1103/physrevlett.92.072502
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发表时间：
2004-02
影响因子：
8.6
通讯作者：
S. Liddick;P. Mantica;R. Janssens;R. Broda;B. A. Brown;M. Carpenter;B. Fornal;M. Honma;T. Mizusaki;A. C. Morton;W. Mueller;T. Otsuka;J. Pavan;A. Stolz;S. Tabor;B. Tomlin;M. Wiedeking
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文献类型：
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作者：
S. Liddick;P. Mantica;R. Janssens;R. Broda;B. A. Brown;M. Carpenter;B. Fornal;M. Honma;T. Mizusaki;A. C. Morton;W. Mueller;T. Otsuka;J. Pavan;A. Stolz;S. Tabor;B. Tomlin;M. Wiedeking
最近对Ca、Ti和Cr等同音在N=32处的亚壳层闭合的实验表征刺激了壳层模型计算，表明这些相同元素的N=34等同音可能表现出壳层闭合的特征，即第一激发2（+）能级具有高能量。为此，我们研究了破碎反应中产生的56Sc的衰变，并在子N=34同位素56Ti中发现了新的伽马射线。第一个2（+）能级的能量为1127 keV，远低于56Ti中存在N=34壳层闭合的预期位置。
Recent experimental characterization of the subshell closure at N=32 in the Ca, Ti, and Cr isotones has stimulated shell-model calculations that indicated the possibility that the N=34 isotones of these same elements could exhibit characteristics of a shell closure, namely, a high energy for the first excited 2(+) level. To that end, we have studied the decay of 56Sc produced in fragmentation reactions and identified new gamma rays in the daughter N=34 isotone 56Ti. The first 2(+) level is found at an energy of 1127 keV, well below the expected position that would indicate the presence of an N=34 shell closure in 56Ti.