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K-pi=0(+) 2.29 s isomer in neutron-rich Tm-174

Chakrawarthy, RS, Walker, PM, Ressler, JJ, Zganjar, EF, Ball, GC, Smith, MB, Andreyev, AN, Ashley, SF, Austin, RAE, Bandyopadhyay, D, Becker, JA, Carroll, JJ, Cross, DS, Gohlke, D, Daoud, JJ, Garrett, PE, Grinyer, GF, Hackman, G, Jones, GA, Kanungo, R, Kulp, WD, Litvinov, Y, Morton, AC, Mills, WJ, Pearson, CJ, Propri, R, Svensson, CE, Wheeler, R and Williams, SJ (2006) K-pi=0(+) 2.29 s isomer in neutron-rich Tm-174 PHYSICAL REVIEW C, 73 (2). ? - ?. ISSN 0556-2813

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Abstract

Gamma-ray and conversion-electron spectroscopy have established the existence of a 2.29(1) s, K-pi=0(+), isomeric state in neutron-rich Tm-174. The isomer deexcites via 100- and 152-keV electromagnetic transitions. First results from a newly commissioned Si(Li) detector array have established their M1 and E3 multipolarities, respectively. The single-particle configurations of the excited states suggest that the E3 transition originates from a pi h(11/2)(-1)->pi d(3/2) configuration change, whereas the M1 transition occurs between members of a Gallaghar-Moszkowski doublet. From the measured half-life, the deduced B(E3) value of 0.024(2) W.u. is highly hindered. The reported measurements resolve ambiguities in the previously proposed beta decay scheme of Er-174 to Tm-174.

Item Type: Article
Uncontrolled Keywords: Science & Technology, Physical Sciences, Physics, Nuclear, Physics, GAMMA-RAY TRANSITIONS, ODD-ODD NUCLEI, SHELL STRUCTURE, ATOMIC-NUCLEI, STATES, DECAY
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Divisions: Faculty of Engineering and Physical Sciences > Physics
Depositing User: Mr Adam Field
Date Deposited: 27 May 2010 14:08
Last Modified: 23 Sep 2013 18:27
URI: http://epubs.surrey.ac.uk/id/eprint/314

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