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

Abstract

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.

Authors:
 [1]; ;  [2]; ; ; ; ; ; ; ; ; ;  [3]; ; ; ; ;  [4];  [5];  [3]
  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)
Publication Date:
OSTI Identifier:
21293947
Resource Type:
Journal Article
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 80; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevC.80.044334; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2813
Country of Publication:
United States
Language:
English
Subject:
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

Citation Formats

Andreyev, A N, Instituut voor Kern-en Stralingsfysica, K. U. Leuven, University of Leuven, B-3001 Leuven, Antalic, S, Saro, S, Ackermann, D, Comas, V F, Heinz, S, Heredia, J A, Hessberger, F P, Khuyagbaatar, J, Kojouharov, I, Kindler, B, Lommel, B, Mann, R, Cocolios, T E, Elseviers, J, Huyse, M, Duppen, P Van, Venhart, M, Franchoo, S, Hofmann, S, and Physikalisches Institut, J. W. Goethe-Universitaet, D-60054 Frankfurt am Main. Identification and decay of the 0.48 ms 13/2{sup +} isomer in {sup 181}Hg. United States: N. p., 2009. Web. doi:10.1103/PHYSREVC.80.044334.
Andreyev, A N, Instituut voor Kern-en Stralingsfysica, K. U. Leuven, University of Leuven, B-3001 Leuven, Antalic, S, Saro, S, Ackermann, D, Comas, V F, Heinz, S, Heredia, J A, Hessberger, F P, Khuyagbaatar, J, Kojouharov, I, Kindler, B, Lommel, B, Mann, R, Cocolios, T E, Elseviers, J, Huyse, M, Duppen, P Van, Venhart, M, Franchoo, S, Hofmann, S, & Physikalisches Institut, J. W. Goethe-Universitaet, D-60054 Frankfurt am Main. Identification and decay of the 0.48 ms 13/2{sup +} isomer in {sup 181}Hg. United States. https://doi.org/10.1103/PHYSREVC.80.044334
Andreyev, A N, Instituut voor Kern-en Stralingsfysica, K. U. Leuven, University of Leuven, B-3001 Leuven, Antalic, S, Saro, S, Ackermann, D, Comas, V F, Heinz, S, Heredia, J A, Hessberger, F P, Khuyagbaatar, J, Kojouharov, I, Kindler, B, Lommel, B, Mann, R, Cocolios, T E, Elseviers, J, Huyse, M, Duppen, P Van, Venhart, M, Franchoo, S, Hofmann, S, and Physikalisches Institut, J. W. Goethe-Universitaet, D-60054 Frankfurt am Main. 2009. "Identification and decay of the 0.48 ms 13/2{sup +} isomer in {sup 181}Hg". United States. https://doi.org/10.1103/PHYSREVC.80.044334.
@article{osti_21293947,
title = {Identification and decay of the 0.48 ms 13/2{sup +} isomer in {sup 181}Hg},
author = {Andreyev, A N and Instituut voor Kern-en Stralingsfysica, K. U. Leuven, University of Leuven, B-3001 Leuven and Antalic, S and Saro, S and Ackermann, D and Comas, V F and Heinz, S and Heredia, J A and Hessberger, F P and Khuyagbaatar, J and Kojouharov, I and Kindler, B and Lommel, B and Mann, R and Cocolios, T E and Elseviers, J and Huyse, M and Duppen, P Van and Venhart, M and Franchoo, S and Hofmann, S and Physikalisches Institut, J. W. Goethe-Universitaet, D-60054 Frankfurt am Main},
abstractNote = {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.},
doi = {10.1103/PHYSREVC.80.044334},
url = {https://www.osti.gov/biblio/21293947}, journal = {Physical Review. C, Nuclear Physics},
issn = {0556-2813},
number = 4,
volume = 80,
place = {United States},
year = {Thu Oct 15 00:00:00 EDT 2009},
month = {Thu Oct 15 00:00:00 EDT 2009}
}