Identification and decay of the 0.48 ms 13/2{sup +} isomer in {sup 181}Hg

Journal Article · Thu Oct 15 00:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.044334· OSTI ID:21293947

Andreyev, A N ^[1]; Antalic, S; Saro, S ^[2]; Ackermann, D; Comas, V F; Heinz, S; Heredia, J A; Hessberger, F P; Khuyagbaatar, J; Kojouharov, I; Kindler, B; Lommel, B; Mann, R ^[3]; Cocolios, T E; Elseviers, J; Huyse, M; Duppen, P Van; Venhart, M ^[4]; Franchoo, S ^[5]; Hofmann, S ^[3]

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1. School of Engineering and Science, University of the West of Scotland, Paisley PA1 2BE (United Kingdom)
2. Department of Nuclear Physics and Biophysics, Comenius University, Bratislava 84248 (Slovakia)
3. GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, D-64291 Darmstadt (Germany)
4. Instituut voor Kern-en Stralingsfysica, K. U. Leuven, University of Leuven, B-3001 Leuven (Belgium)
5. IPN Orsay, F-91406 Orsay Cedex (France)

A new isomer with a half-life of 0.48(2) ms was identified in the nuclide {sup 181}Hg, which was produced in the complete fusion reaction {sup 40}Ca+{sup 144}Sm{yields}{sup 184}Pb* at the velocity filter SHIP (GSI, Darmstadt). The isomeric state was tentatively assigned a spin-parity of 13/2{sup +}. We propose that this isomer de-excites by a yet unobserved low-energy, strongly converted {gamma}-ray transition, followed by a newly identified cascade composed of a 90.3 keV M1 and a 71.4 keV E2 {gamma}-ray transition.

• OSTI ID: 21293947
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 80, Issue 4; Other Information: DOI: 10.1103/PhysRevC.80.044334; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALCIUM 40
DECAY
E2-TRANSITIONS
GAMMA RADIATION
HALF-LIFE
HEAVY ION FUSION REACTIONS
ISOMERS
KEV RANGE 10-100
LEAD 184
M1-TRANSITIONS
MERCURY 181
PARITY
SAMARIUM 144
SPIN