K isomers in 254No: probing single-particle energies and pairing strengths in the heaviest nuclei.
K isomers in 254No: probing single-particle energies and pairing strengths in the heaviest nuclei.
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DOI：
10.1103/physrevlett.97.082502
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发表时间：
2006-08
影响因子：
8.6
通讯作者：
S. Tandel;T. Khoo;D. Seweryniak;G. Mukherjee;I. Ahmad;B. Back;R. Blinstrup;M. Carpenter;J. Chapman;P. Chowdhury;C. Davids;A. Hecht;A. Heinz;P. Ikin;R. Janssens;F. Kondev;T. Lauritsen;C. Lister;E. F. Moore;D. Peterson;P. Reiter;U. S. Tandel;X. Wang;S. Zhu
中科院分区：
文献类型：
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作者：
S. Tandel;T. Khoo;D. Seweryniak;G. Mukherjee;I. Ahmad;B. Back;R. Blinstrup;M. Carpenter;J. Chapman;P. Chowdhury;C. Davids;A. Hecht;A. Heinz;P. Ikin;R. Janssens;F. Kondev;T. Lauritsen;C. Lister;E. F. Moore;D. Peterson;P. Reiter;U. S. Tandel;X. Wang;S. Zhu
We have identified two isomers in 254No, built on two- and four-quasiparticle excitations, with quantum numbers K pi = 8- and (14+), as well as a low-energy 2-quasiparticle Kpi = 3+ state. The occurrence of isomers establishes that K is a good quantum number and therefore that the nucleus has an axial prolate shape. The 2-quasiparticle states probe the energies of the proton levels that govern the stability of superheavy nuclei, test 2-quasiparticle energies from theory, and thereby check their predictions of magic gaps.
