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Phys. Rev. C 67, 064310 (2003) [6 pages]

Projectile Coulomb excitation of 78Se

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T. Hayakawa*, Y. Toh, M. Oshima, A. Osa, M. Koizumi, Y. Hatsukawa, Y. Utsuno, J. Katakura, and M. Matsuda
Japan Atomic Energy Research Institute, Tokai, Ibaraki 319-1195, Japan

T. Morikawa
Kyushu University, Hakozaki, Fukuoka 812-8581, Japan

M. Sugawara
Chiba Institute of Technology, Narashino, Chiba 275-0023, Japan

H. Kusakari
Chiba University, Inage-ku, Chiba 263-8522, Japan

T. Czosnyka
Heavy Ion Laboratory, Warsaw University, Pasteura 5a, 02-093 Warszawa, Poland

Received 27 December 2002; published 23 June 2003

The excited states of a 78Se nucleus were studied via a multiple Coulomb excitation experiment. A natural lead target was irradiated by the 78Se beam and γ rays in coincidence with the scattered projectiles were collected. Resulting yields were used as an input for the least squares analysis code GOSIA. Four known excited states were observed and nine matrix elements including three diagonal ones were derived from this analysis. The deformation parameter 〈Q2〉 was deduced by a sum rule. The results showed good agreement with the calculation by the asymmetric rotor model with triaxial deformation parameter γ≃23°–28°. The quadrupole moments of the 21+ and 22+ states analyzed by this model suggested that both levels had the same intrinsic state.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.67.064310
DOI:
10.1103/PhysRevC.67.064310
PACS:
25.70.De, 21.10.Ky, 23.20.-g, 27.50.+e

*Electronic address: hayakawa@jball4.tokai.jaeri.go.jp

 
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