Discovery of highly excited long-lived isomers in neutron-rich hafnium and tantalum isotopes through direct mass measurements.
Discovery of highly excited long-lived isomers in neutron-rich hafnium and tantalum isotopes through direct mass measurements.
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DOI：
10.1103/physrevlett.105.172501
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发表时间：
2010-10
影响因子：
8.6
通讯作者：
M. Reed;I. Cullen;P. Walker;Y. Litvinov;K. Blaum;F. Bosch;C. Brandau;J. Carroll;D. Cullen-D.-Cull
中科院分区：
文献类型：
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作者：
M. Reed;I. Cullen;P. Walker;Y. Litvinov;K. Blaum;F. Bosch;C. Brandau;J. Carroll;D. Cullen-D.-Cull
在储存环上对冷却的Au弹丸碎裂产物进行了研究。这使得能量高达3 MeV的亚稳态核激发，半衰期延长到几分钟或更长时间，在富中子核素Hf和Ta中被识别。结果支持预测的强烈有利的异构体区域附近的中子数116。
A study of cooled ¹⁹⁷Au projectile-fragmentation products has been performed with a storage ring. This has enabled metastable nuclear excitations with energies up to 3 MeV, and half-lives extending to minutes or longer, to be identified in the neutron-rich nuclides ¹⁸³(,)¹⁸⁴(,)¹⁸⁶Hf and ¹⁸⁶(,)¹⁸⁷Ta. The results support the prediction of a strongly favored isomer region near neutron number 116.