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Isomer-tagged differential-plunger measurements in proton-unbound 144Ho

Mason, PJR, Cullen, DM, Scholey, C, Dewald, A, M�ller, O, Iwasaki, H, Pissulla, T, Rother, W, Dare, JA, Greenlees, PT , Jakobsson, U, Jones, PM, Julin, R, Juutinen, S, Ketelhut, S, Leino, M, Lumley, NM, Niclasen, B, Nyman, M, Peura, P, Puurunen, A, Rahkila, P, Ruotsalainen, P, Sorri, J, Sar�n, J, Uusitalo, J and Xu, FR (2010) Isomer-tagged differential-plunger measurements in proton-unbound 144Ho Physics Letters B, 683 (1). pp. 17-20.

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Abstract

The lifetime of an excited state above a weakly populated isomer in the proton-unbound odd-odd nucleus 144Ho has been measured using the recoil distance Doppler shift method. This measurement represents the first differential-plunger lifetime measurement to utilize recoil-isomer tagging. The first excited I[pi]=(10+) state above the two-quasiparticle [pi]h11/2[circle times operator][nu]h11/2(8+) isomer was determined to have a lifetime of [tau]=6(1)�ps. Potential energy surface calculations, based on the configuration-constrained blocking method, predict the isomeric state to have [gamma]-soft triaxial-nuclear shape with [gamma][approximate]24�. The lifetime of the (10+) state can be understood from these calculations if there is a degree of rotational alignment in this band, with the K value being lower than the bandhead spin. However, the validity of the K quantum number with large predicted triaxiality and gamma softness requires further theoretical study.

Item Type: Article
Divisions : Faculty of Arts and Social Sciences > School of Arts > Sound Recording
Authors :
NameEmailORCID
Mason, PJRUNSPECIFIEDUNSPECIFIED
Cullen, DMUNSPECIFIEDUNSPECIFIED
Scholey, CUNSPECIFIEDUNSPECIFIED
Dewald, AUNSPECIFIEDUNSPECIFIED
M�ller, OUNSPECIFIEDUNSPECIFIED
Iwasaki, HUNSPECIFIEDUNSPECIFIED
Pissulla, TUNSPECIFIEDUNSPECIFIED
Rother, WUNSPECIFIEDUNSPECIFIED
Dare, JAUNSPECIFIEDUNSPECIFIED
Greenlees, PTUNSPECIFIEDUNSPECIFIED
Jakobsson, UUNSPECIFIEDUNSPECIFIED
Jones, PMUNSPECIFIEDUNSPECIFIED
Julin, RUNSPECIFIEDUNSPECIFIED
Juutinen, SUNSPECIFIEDUNSPECIFIED
Ketelhut, SUNSPECIFIEDUNSPECIFIED
Leino, MUNSPECIFIEDUNSPECIFIED
Lumley, NMUNSPECIFIEDUNSPECIFIED
Niclasen, BUNSPECIFIEDUNSPECIFIED
Nyman, MUNSPECIFIEDUNSPECIFIED
Peura, PUNSPECIFIEDUNSPECIFIED
Puurunen, AUNSPECIFIEDUNSPECIFIED
Rahkila, PUNSPECIFIEDUNSPECIFIED
Ruotsalainen, PUNSPECIFIEDUNSPECIFIED
Sorri, JUNSPECIFIEDUNSPECIFIED
Sar�n, JUNSPECIFIEDUNSPECIFIED
Uusitalo, JUNSPECIFIEDUNSPECIFIED
Xu, FRUNSPECIFIEDUNSPECIFIED
Date : 11 January 2010
Identification Number : 10.1016/j.physletb.2009.11.042
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 14:58
Last Modified : 31 Oct 2017 14:10
URI: http://epubs.surrey.ac.uk/id/eprint/7400

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