Discovery of highly excited long-lived isomers in neutron-rich hafnium and tantalum isotopes through direct mass measurements

M. W. Reed, I. J. Cullen, P. M. Walker, Yu A. Litvinov, K. Blaum, F. Bosch, C. Brandau, J. J. Carroll, D. M. Cullen, A. Y. Deo, B. Detwiller, C. Dimopoulou, G. D. Dracoulis, F. Farinon, H. Geissel, E. Haettner, M. Heil, R. S. Kempley, R. Knöbel, C. KozhuharovJ. Kurcewicz, N. Kuzminchuk, S. Litvinov, Z. Liu, R. Mao, C. Nociforo, F. Nolden, W. R. Plass, A. Prochazka, C. Scheidenberger, M. Steck, Th Stöhlker, B. Sun, T. P D Swan, G. Trees, H. Weick, N. Winckler, M. Winkler, P. J. Woods, T. Yamaguchi

    Research output: Contribution to journalArticlepeer-review

    Abstract

    A study of cooled Au197 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 Hf183,184,186 and Ta186,187. The results support the prediction of a strongly favored isomer region near neutron number 116. © 2010 The American Physical Society.
    Original languageEnglish
    Article number172501
    JournalPhysical Review Letters
    Volume105
    Issue number17
    DOIs
    Publication statusPublished - 18 Oct 2010

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