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

P. J R Mason; D. M. Cullen; C. Scholey; A. Dewald; O. Möller; H. Iwasaki; T. Pissulla; W. Rother; J. A. Dare; P. T. Greenlees; U. Jakobsson; P. M. Jones; R. Julin; S. Juutinen; S. Ketelhut; M. Leino; N. M. Lumley; B. Niclasen; M. Nyman; P. Peura; A. Puurunen; P. Rahkila; P. Ruotsalainen; J. Sorri; J. Sarén; J. Uusitalo; F. R. Xu

doi:10.1016/j.physletb.2009.11.042

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

P. J R Mason, D. M. Cullen, C. Scholey, A. Dewald, O. Möller, H. Iwasaki, T. Pissulla, W. Rother, J. A. Dare, P. T. Greenlees, U. Jakobsson, P. M. Jones, R. Julin, S. Juutinen, S. Ketelhut, M. Leino, N. M. Lumley, B. Niclasen, M. Nyman, P. PeuraA. Puurunen, P. Rahkila, P. Ruotsalainen, J. Sorri, J. Sarén, J. Uusitalo, F. R. Xu

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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 Iπ = (10+) state above the two-quasiparticle π h11 / 2 ⊗ ν h11 / 2 (8+) isomer was determined to have a lifetime of τ = 6 (1) ps. Potential energy surface calculations, based on the configuration-constrained blocking method, predict the isomeric state to have γ-soft triaxial-nuclear shape with | γ | ≈ 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. © 2009 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	17-20
Number of pages	3
Journal	Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	683
Issue number	1
DOIs	https://doi.org/10.1016/j.physletb.2009.11.042
Publication status	Published - 11 Jan 2010

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Mason, P. J. R., Cullen, D. M., Scholey, C., Dewald, A., Möller, O., Iwasaki, H., Pissulla, T., Rother, W., Dare, J. A., Greenlees, P. T., Jakobsson, U., Jones, P. M., Julin, R., Juutinen, S., Ketelhut, S., Leino, M., Lumley, N. M., Niclasen, B., Nyman, M., ... Xu, F. R. (2010). Isomer-tagged differential-plunger measurements in proton-unbound 144Ho. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 683(1), 17-20. https://doi.org/10.1016/j.physletb.2009.11.042

@article{fb24f4516fe34e42b26e788dc6b3eb01,

title = "Isomer-tagged differential-plunger measurements in proton-unbound 144Ho",

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 Iπ = (10+) state above the two-quasiparticle π h11 / 2 ⊗ ν h11 / 2 (8+) isomer was determined to have a lifetime of τ = 6 (1) ps. Potential energy surface calculations, based on the configuration-constrained blocking method, predict the isomeric state to have γ-soft triaxial-nuclear shape with | γ | ≈ 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. {\textcopyright} 2009 Elsevier B.V. All rights reserved.",

author = "Mason, {P. J R} and Cullen, {D. M.} and C. Scholey and A. Dewald and O. M{\"o}ller and H. Iwasaki and T. Pissulla and W. Rother and Dare, {J. A.} and Greenlees, {P. T.} and U. Jakobsson and Jones, {P. M.} and R. Julin and S. Juutinen and S. Ketelhut and M. Leino and Lumley, {N. M.} and B. Niclasen and M. Nyman and P. Peura and A. Puurunen and P. Rahkila and P. Ruotsalainen and J. Sorri and J. Sar{\'e}n and J. Uusitalo and Xu, {F. R.}",

year = "2010",

month = jan,

day = "11",

doi = "10.1016/j.physletb.2009.11.042",

language = "English",

volume = "683",

pages = "17--20",

journal = "Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier BV",

number = "1",

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Mason, PJR, Cullen, DM, Scholey, C, Dewald, A, Möller, 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, Sarén, J, Uusitalo, J & Xu, FR 2010, 'Isomer-tagged differential-plunger measurements in proton-unbound 144Ho', Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 683, no. 1, pp. 17-20. https://doi.org/10.1016/j.physletb.2009.11.042

TY - JOUR

T1 - Isomer-tagged differential-plunger measurements in proton-unbound 144Ho

AU - Mason, P. J R

AU - Cullen, D. M.

AU - Scholey, C.

AU - Dewald, A.

AU - Möller, O.

AU - Iwasaki, H.

AU - Pissulla, T.

AU - Rother, W.

AU - Dare, J. A.

AU - Greenlees, P. T.

AU - Jakobsson, U.

AU - Jones, P. M.

AU - Julin, R.

AU - Juutinen, S.

AU - Ketelhut, S.

AU - Leino, M.

AU - Lumley, N. M.

AU - Niclasen, B.

AU - Nyman, M.

AU - Peura, P.

AU - Puurunen, A.

AU - Rahkila, P.

AU - Ruotsalainen, P.

AU - Sorri, J.

AU - Sarén, J.

AU - Uusitalo, J.

AU - Xu, F. R.

PY - 2010/1/11

Y1 - 2010/1/11

N2 - 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 Iπ = (10+) state above the two-quasiparticle π h11 / 2 ⊗ ν h11 / 2 (8+) isomer was determined to have a lifetime of τ = 6 (1) ps. Potential energy surface calculations, based on the configuration-constrained blocking method, predict the isomeric state to have γ-soft triaxial-nuclear shape with | γ | ≈ 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. © 2009 Elsevier B.V. All rights reserved.

AB - 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 Iπ = (10+) state above the two-quasiparticle π h11 / 2 ⊗ ν h11 / 2 (8+) isomer was determined to have a lifetime of τ = 6 (1) ps. Potential energy surface calculations, based on the configuration-constrained blocking method, predict the isomeric state to have γ-soft triaxial-nuclear shape with | γ | ≈ 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. © 2009 Elsevier B.V. All rights reserved.

U2 - 10.1016/j.physletb.2009.11.042

DO - 10.1016/j.physletb.2009.11.042

M3 - Article

SN - 0370-2693

VL - 683

SP - 17

EP - 20

JO - Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1

ER -

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

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