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Phys. Rev. C 69, 051301 (2004) [5 pages]

Systematics of the bimodal isoscalar giant dipole resonance

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M. Uchida1 *, H. Sakaguchi1, M. Itoh1 †, M. Yosoi1, T. Kawabata1 ‡, Y. Yasuda1, H. Takeda1, T. Murakami1, S. Terashima1, S. Kishi1, U. Garg2, P. Boutachkov2, M. Hedden2, B. Kharraja2, M. Koss2, B. K. Nayak2, S. Zhu2, M. Fujiwara3,4, H. Fujimura3, H. P. Yoshida3, K. Hara3, H. Akimune5, and M. N. Harakeh6
1Department of Physics, Kyoto University, Kyoto 606-8502, Japan
2Physics Department, University of Notre Dame, Notre Dame, Indiana 46556, USA
3Research Center for Nuclear Physics, Osaka University, Osaka 567-0047, Japan
4Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai 319-1195, Japan
5Department of Physics, Konan University, Kobe 658-8501, Japan
6Kernfysisch Versneller Instituut, 9747 AA Groningen, The Netherlands

Rapid Communication Received 21 January 2004; published 17 May 2004

The systematic behavior of the isoscalar giant dipole resonance (ISGDR) in 90Zr , 116Sn , 144Sm , and 208Pb is studied with inelastic α scattering at Eα=386  MeV . Multipole-decomposition analysis is applied to extract the excitation strengths of giant resonances from the (α,α′) differential cross sections at θlab=0.64°–13.5° . The bimodal structure of the ISGDR is discussed and compared with recent theoretical results from Hartree‐Fock+random‐phase‐approximation calculations.


©2004 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevC.69.051301
DOI: 10.1103/PhysRevC.69.051301
PACS: 24.30.Cz, 21.65.+f, 24.50.+g

* Present address: Research Center for Nuclear Physics, Osaka University, Osaka 567-0047, Japan.
† Present address: Research Center for Nuclear Physics, Osaka University, Osaka 567-0047, Japan.
‡ Present address: Center for Nuclear Study (CNS), Graduate School of Science, University of Tokyo, Wako 351-0198, Japan.

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