Pygmy dipole resonance and dipole polarizability in 90Zr

C. Iwamoto, A. Tamii, H. Utsunomiya, H. Akimune, H. Nakada, T. Shima, T. Hashimoto, T. Yamagata, T. Kawabata, Y. Fujita, H. Matsubara, T. Suzuki, H. Fujita, Y. Shimbara, M. Nagashima, M. Sakuda, T. Mori, T. Izumi, A. Okamoto, T. KondoT. W. Lui, B. Bilgier, H. C. Kozer, K. Hatanaka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Electric dipole (E1) reduced transition probability B(E1) of 90Zr was obtained by the inelastic proton scattering near 0 degrees using a 295 MeV proton beam and multipole decomposition analysis of the angular distribution by the distorted-wave Born approximation with the Hartree-Fock plus random-phase approximation model and inclusion of El Coulomb excitation, and the E1 strength of the pygmy dipole resonance was found in the vicinity of the neutron threshold in the low-energy tail of the giant dipole resonance. Using the data, we plan to determine the precise dipole polarizability αD which is defined as an inversely energy-weighted sum value of the elecrric dipole strength. The dipole polarizability is expected to constrain the symmetry energy term of the neutron matter equation of state. Thus systematical measurement of the dipole polarizability is important.

Original languageEnglish
Title of host publicationOrigin of Matter and Evolution of Galaxies 2013 - Proceedings of the 12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013
PublisherAmerican Institute of Physics Inc.
Pages426-431
Number of pages6
ISBN (Print)9780735412286
DOIs
Publication statusPublished - Jan 1 2014
Event12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013 - Tsukuba, Japan
Duration: Nov 18 2013Nov 21 2013

Publication series

NameAIP Conference Proceedings
Volume1594
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013
CountryJapan
CityTsukuba
Period11/18/1311/21/13

Keywords

  • Dipole polarizability
  • E1 transition probability
  • Multipole decomposition analysis
  • Neutron equation of state
  • Neutron star
  • Pygmy dipole resonance

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Iwamoto, C., Tamii, A., Utsunomiya, H., Akimune, H., Nakada, H., Shima, T., Hashimoto, T., Yamagata, T., Kawabata, T., Fujita, Y., Matsubara, H., Suzuki, T., Fujita, H., Shimbara, Y., Nagashima, M., Sakuda, M., Mori, T., Izumi, T., Okamoto, A., ... Hatanaka, K. (2014). Pygmy dipole resonance and dipole polarizability in 90Zr. In Origin of Matter and Evolution of Galaxies 2013 - Proceedings of the 12th International Symposium on Origin of Matter and Evolution of Galaxies, OMEG 2013 (pp. 426-431). (AIP Conference Proceedings; Vol. 1594). American Institute of Physics Inc.. https://doi.org/10.1063/1.4874105