Reed MW, Cullen IJ, Walker PM, Litvinov YA, Blaum K, Bosch F, Brandau C, Carroll JJ, Cullen DM, Deo AY, Detwiller B, Dimopoulou C, Dracoulis GD, Farinon F, Geissel H, Haettner E, Heil M, Kempley RS, Knöbel R, Kozhuharov C, Kurcewicz J, Kuzminchuk N, Litvinov S, Liu Z, Mao R, Nociforo C, Nolden F, Plass WR, Prochazka A, Scheidenberger C, Steck M, Stöhlker T, Sun B, Swan TPD, Trees G, Weick H, Winckler N, Winkler M, Woods PJ, Yamaguchi T. Discovery of highly excited long-lived isomers in neutron-rich hafnium and tantalum isotopes through direct mass measurements.
Phys Rev Lett 2010;
105:172501. [PMID:
21231037 DOI:
10.1103/physrevlett.105.172501]
[Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Indexed: 05/30/2023]
Abstract
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.
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