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Lifetime of the recently identified 10+ isomeric state at 3279 keV in the Nd136 nucleus

Tucholski, A., Droste, Ch., Srebrny, J., Petrache, C. M., Skalski, J., Jachimowicz, P., Fila, M., Abraham, T., Kisieliński, M., Kordyasz, A. , Kowalczyk, M., Kownacki, J., Marchlewski, T., Napiorkowski, P. J., Próchniak, L., Samorajczyk-Pyśk, J., Stolarz, A., Astier, A., Lv, B. F., Dupont, E., Lalkovski, S., Walker, P., Grodner, E. and Patyk, Z. (2019) Lifetime of the recently identified 10+ isomeric state at 3279 keV in the Nd136 nucleus Physical Review C, 100 (1), 014330.

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Abstract

Background:

The γ softness of 136Nd makes it possible to study the shape changes induced by two-proton or two-neutron excitation.

Purpose:

We measure the lifetimes of two-quasiparticle states of the bands based on the 10+ states at 3296 and 3279 keV to investigate the shape change induced by the alignment of two protons or two neutrons in the h11/2 orbital.

Methods:

The recoil-distance Doppler shift method was used for the study of 136Nd studies, which was formed by the fusion reaction 120Sn(20Ne, 4n)136Nd, at Ebeam = 85 MeV. Calculations were performed within the microscopic-macroscopic approach, based on the deformed Woods-Saxon single-particle potential and the Yukawa-plus-exponential macroscopic energy.

Results:

The lifetime of the 10+ state at 3279 keV of 136Nd was measured to be T 10+1/2 = 1.63(9) ns. The lifetimes of the 2+ state at 374 keV and of the 12+ state at 3686 keV of the ground band were also measured to be T 2+1/2 = 26.5(14) ps and T 12+1/2 = 22.5(14) ps.

Conclusions:

The measured lifetime of 10+ the state at 3279 keV together with other observables confirm the structure change in 136Nd. A rather small reduced hindrance of the electromagnetic decay of the 10+ state at 3279 keV would be consistent with its K-mixed character.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
NameEmailORCID
Tucholski, A.
Droste, Ch.
Srebrny, J.
Petrache, C. M.
Skalski, J.
Jachimowicz, P.
Fila, M.
Abraham, T.
Kisieliński, M.
Kordyasz, A.
Kowalczyk, M.
Kownacki, J.
Marchlewski, T.
Napiorkowski, P. J.
Próchniak, L.
Samorajczyk-Pyśk, J.
Stolarz, A.
Astier, A.
Lv, B. F.
Dupont, E.
Lalkovski, S.
Walker, P.P.Walker@surrey.ac.uk
Grodner, E.
Patyk, Z.
Date : 31 July 2019
Funders : UK Science and Technology Facilities Council
DOI : 10.1103/PhysRevC.100.014330
Copyright Disclaimer : ©2019 American Physical Society
Depositing User : Diane Maxfield
Date Deposited : 12 Aug 2019 13:50
Last Modified : 13 Aug 2019 08:28
URI: http://epubs.surrey.ac.uk/id/eprint/852397

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