On the nature of "three-phonon" excitations in 112Cd

H. Lehmann; P. E. Garrett; J. Jolie; C. A. McGrath; Minfang Yeh; S. W. Yates

doi:10.1016/0370-2693(96)01038-6

On the nature of "three-phonon" excitations in ¹¹²Cd

H. Lehmann, P. E. Garrett, J. Jolie, C. A. McGrath, Minfang Yeh, S. W. Yates

Chemistry

Research output: Contribution to journal › Article › peer-review

52 Scopus citations

Abstract

The lifetimes of proposed 3-phonon states in ¹¹²Cd have been measured using the Doppler shift attenuation method (DSAM) following the (n,n′γ) reaction. The experimental results allow the determination of relevant B(E2) values which are compared to different theoretical descriptions. Collective enhancements favouring the interpretation of collectivity in the phonon model are observed for 3⁺ and 4⁺ members of the 3-phonon quintuplet. However, for the proposed 2⁺ member, this simple model fails most likely due to the subtle interplay between intruder, mixed-symmetry, and phonon states, and the decay pattern is strongly perturbed. The best overall agreement is obtained with IBM-2 calculations.

Original language	English
Pages (from-to)	259-265
Number of pages	7
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	387
Issue number	2
DOIs	https://doi.org/10.1016/0370-2693(96)01038-6
State	Published - Oct 17 1996

Keywords

3-phonon states
B(E2) values
DSAM
IBM
Lifetimes
Phonon model

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/0370-2693(96)01038-6

Cite this

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title = "On the nature of {"}three-phonon{"} excitations in 112Cd",

abstract = "The lifetimes of proposed 3-phonon states in 112Cd have been measured using the Doppler shift attenuation method (DSAM) following the (n,n′γ) reaction. The experimental results allow the determination of relevant B(E2) values which are compared to different theoretical descriptions. Collective enhancements favouring the interpretation of collectivity in the phonon model are observed for 3+ and 4+ members of the 3-phonon quintuplet. However, for the proposed 2+ member, this simple model fails most likely due to the subtle interplay between intruder, mixed-symmetry, and phonon states, and the decay pattern is strongly perturbed. The best overall agreement is obtained with IBM-2 calculations.",

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AU - Lehmann, H.

AU - Garrett, P. E.

AU - Jolie, J.

AU - McGrath, C. A.

AU - Yeh, Minfang

AU - Yates, S. W.

PY - 1996/10/17

Y1 - 1996/10/17

N2 - The lifetimes of proposed 3-phonon states in 112Cd have been measured using the Doppler shift attenuation method (DSAM) following the (n,n′γ) reaction. The experimental results allow the determination of relevant B(E2) values which are compared to different theoretical descriptions. Collective enhancements favouring the interpretation of collectivity in the phonon model are observed for 3+ and 4+ members of the 3-phonon quintuplet. However, for the proposed 2+ member, this simple model fails most likely due to the subtle interplay between intruder, mixed-symmetry, and phonon states, and the decay pattern is strongly perturbed. The best overall agreement is obtained with IBM-2 calculations.

AB - The lifetimes of proposed 3-phonon states in 112Cd have been measured using the Doppler shift attenuation method (DSAM) following the (n,n′γ) reaction. The experimental results allow the determination of relevant B(E2) values which are compared to different theoretical descriptions. Collective enhancements favouring the interpretation of collectivity in the phonon model are observed for 3+ and 4+ members of the 3-phonon quintuplet. However, for the proposed 2+ member, this simple model fails most likely due to the subtle interplay between intruder, mixed-symmetry, and phonon states, and the decay pattern is strongly perturbed. The best overall agreement is obtained with IBM-2 calculations.

KW - 3-phonon states

KW - B(E2) values

KW - DSAM

KW - IBM

KW - Lifetimes

KW - Phonon model

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