Phys. Rev. C 70, 064321 (2004) [4 pages]

E2 excitation strength in ⁵⁵Ni: Coupling of the ⁵⁶Ni 2₁⁺ collective core vibration to the f_7∕2 odd neutron hole

Abstract

References

Citing Articles (2)

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K. L. Yurkewicz^1,2, D. Bazin¹, B. A. Brown^1,2, C. M. Campbell^1,2, J. A. Church^1,2,*, D.-C. Dinca^1,2, A. Gade¹, T. Glasmacher^1,2, M. Honma³, T. Mizusaki⁴, W. F. Mueller¹, H. Olliver^1,2, T. Otsuka^5,6, L. A. Riley⁷, and J. R. Terry^1,2
¹National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
²Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
³Center for Mathematical Sciences, University of Aizu, Tsuruga, Ikki-machi, Aizu-Wakamatsu, Fukushima 965-8580, Japan
⁴Institute of Natural Sciences, Senshu University, Higashimita, Tama, Kawasaki, Kanagawa 214-8580, Japan
⁵Department of Physics and Center for Nuclear Study, University of Tokyo, Hongo, Tokyo 113-0033, Japan
⁶RIKEN, Hirosawa, Wako-shi, Saitama 351-0198, Japan
⁷Department of Physics and Astronomy, Ursinus College, Collegeville, Pennsylvania 19426, USA

Received 6 August 2004; published 27 December 2004

The collectivity of the odd-mass nucleus ⁵⁵Ni was explored via intermediate-energy Coulomb excitation using a powerful combination of particle and γ-ray spectroscopy. A γ-ray at 2879(18) keV was observed and is interpreted to deexcite a member of the core-coupled quintuplet 2₁⁺(⁵⁶Ni)⊗νf_7∕2⁻¹ at the same energy. By similarity with the mirror nucleus ⁵⁵Co, transition probabilities were calculated assuming J^π=9∕2⁻ and J^π=11∕2⁻ for this state. Both assumptions lead to a transition strength higher than predicted by a large-scale shell-model calculation using the GXPF1 effective interaction and exceed the value predicted within a simple weak-coupling approach.

URL:

http://link.aps.org/doi/10.1103/PhysRevC.70.064321

DOI:

10.1103/PhysRevC.70.064321

PACS:

27.40.+z, 25.70.De, 23.20.Lv, 23.20.Js

^*Present address: Lawrence Livermore National Laboratory, Livermore, CA 94550.

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Phys. Rev. C 70, 064321 (2004) [4 pages]

E2 excitation strength in 55Ni: Coupling of the 56Ni 21+ collective core vibration to the f7∕2 odd neutron hole

E2 excitation strength in ⁵⁵Ni: Coupling of the ⁵⁶Ni 2₁⁺ collective core vibration to the f_7∕2 odd neutron hole