Electric quadrupole moment of 17B and anomalous E2 effective charges for neutron-rich nuclei

H. Ogawa, K. Asahi, K. Sakai, T. Suzuki, H. Izumi, H. Miyoshi, M. Nagakura, K. Yogo, A. Goto, T. Suga, T. Honda, H. Ueno, Y. X. Watanabe, K. Yoneda, A. Yoshimi, N. Fukuda, Y. Kobayashi, A. Yoshida, T. Kubo, M. Ishihara, N. Imai, N. Aoi, W.-D. Schmidt-Ott, G. Neyens, and S. Teughels
Phys. Rev. C 67, 064308 – Published 20 June 2003
PDFExport Citation

Abstract

The electric quadrupole moment Q for the ground state of 17B was determined by the β-NMR method applied to spin-polarized projectile fragments. From the measured quadrupole coupling constant, |eqQ/h(17BinMg)|=137.4±4.5kHz, for 17B in a Mg single crystal stopper the Q moment was deduced as |Q(17B)|=38.6±1.5mb. As was the case in the previous 15B result, the obtained Q moment is very close to that for the N=8 isotope 13B, in sharp contrast to the results of conventional shell-model calculations using constant effective charges. Comparison of the shell-model calculations indicates substantial reduction of the E2 effective charges for isotopes with large (NZ)/A ratios. The results were well accounted for in terms of (NZ)/A dependent E2 polarization charges as predicted by Bohr and Mottelson and by incorporating the decoupling feature of loosely bound particles.

  • Received 30 December 2002

DOI:https://doi.org/10.1103/PhysRevC.67.064308

©2003 American Physical Society

Authors & Affiliations

H. Ogawa*, K. Asahi, K. Sakai, T. Suzuki, H. Izumi§, H. Miyoshi, M. Nagakura, K. Yogo, A. Goto, T. Suga, and T. Honda

  • Department of Physics, Tokyo Institute of Technology, Oh-okayama 2-12-1, Meguro-ku, Tokyo 152-8551, Japan

H. Ueno, Y. X. Watanabe, K. Yoneda, A. Yoshimi, N. Fukuda, Y. Kobayashi, A. Yoshida, T. Kubo, and M. Ishihara

  • RIKEN, Hirosawa 2-1, Wako-shi, Saitama 351-0198, Japan

N. Imai and N. Aoi

  • Department of Physics, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan

W.-D. Schmidt-Ott

  • Zweites Physikalisches Institut, Der Universität Göttingen, Bunsenstrasse 7-9, D-37073 Göttingen, Germany

G. Neyens and S. Teughels

  • Instituut voor Kern- en Stralingsfysica, University of Leuven, Celestijnenlaan 200 D, B-3001 Leuven, Belgium

  • *Present address: Photonics Research Institute, AIST, Umezono 1-1-1, Tsukuba, Ibaraki 305-8568, Japan. Electronic address: ogawa.h@aist.go.jp
  • Also at RIKEN, Hirosawa 2-1, Wako-shi, Saitama 351-0198, Japan.
  • Present address: Sony LSI Design Inc., Goudo-cho 134, Hodogaya-ku, Yokohama-shi, Kanagawa 240-0005, Japan.
  • §Present address: Department of Physics, Osaka University, Machikaneyama 1-16, Toyonaka, Osaka 560-0043, Japan.
  • Present address: Sanwa Newtec Co., Ltd., Shode 1-11, Kiyotake-Cho, Miyazaki-Gun, Miyazaki 889-1603, Japan.

References (Subscription Required)

Click to Expand
Issue

Vol. 67, Iss. 6 — June 2003

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×