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Three-quasiparticle isomer in 173Ta and the excitation energy dependence of K-forbidden transition rates

Wood, Rachael, Walker, Philip, Lane, GJ, Carroll, RJ, Cullen, DM, Dracoulis, GD, Hota, SS, Kibédi, T, Palalani, N, Podolyak, Zsolt , Reed, MW, Schiffl, K and Wright, AM (2017) Three-quasiparticle isomer in 173Ta and the excitation energy dependence of K-forbidden transition rates Physical Review C, 95, 054308.

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Abstract

Using the 168Er(10B,5n) reaction at a beam energy of 68 MeV, new data have been obtained for the population and decay of a T1/2 = 148 ns, Kπ = 21/2− three-quasiparticle isomer at 1717 keV in 173Ta. Revised decay energies and intensities have been determined, together with newly observed members of a rotational band associated with the isomer. By comparison with other isomers in the A ≈ 180 deformed region, the 173Ta isomer properties help to specify the key degrees of freedom that determine K-forbidden transition rates. In particular, when all three quasiparticles are of the same nucleon type, there is a strong dependence of the E2 reduced hindrance factor on the isomer excitation energy.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
Wood, Rachaelr.t.wood@surrey.ac.ukUNSPECIFIED
Walker, PhilipP.Walker@surrey.ac.ukUNSPECIFIED
Lane, GJUNSPECIFIEDUNSPECIFIED
Carroll, RJUNSPECIFIEDUNSPECIFIED
Cullen, DMUNSPECIFIEDUNSPECIFIED
Dracoulis, GDUNSPECIFIEDUNSPECIFIED
Hota, SSUNSPECIFIEDUNSPECIFIED
Kibédi, TUNSPECIFIEDUNSPECIFIED
Palalani, NUNSPECIFIEDUNSPECIFIED
Podolyak, ZsoltZ.Podolyak@surrey.ac.ukUNSPECIFIED
Reed, MWUNSPECIFIEDUNSPECIFIED
Schiffl, KUNSPECIFIEDUNSPECIFIED
Wright, AMUNSPECIFIEDUNSPECIFIED
Date : 11 May 2017
Identification Number : 10.1103/PhysRevC.95.054308
Copyright Disclaimer : ©2017 American Physical Society
Depositing User : Melanie Hughes
Date Deposited : 15 Sep 2017 07:57
Last Modified : 15 Sep 2017 07:57
URI: http://epubs.surrey.ac.uk/id/eprint/842276

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