Observation of low- and high-energy gamow-teller phonon excitations in nuclei

  • Y. Fujita
  • , H. Fujita
  • , T. Adachi
  • , C. L. Bai
  • , A. Algora
  • , G. P.A. Berg
  • , P. Von Brentano
  • , G. Colò
  • , M. Csatlós
  • , J. M. Deaven
  • , E. Estevez-Aguado
  • , C. Fransen
  • , D. De Frenne
  • , K. Fujita
  • , E. Ganioǧlu
  • , C. J. Guess
  • , J. Gulyás
  • , K. Hatanaka
  • , K. Hirota
  • , M. Honma
  • D. Ishikawa, E. Jacobs, A. Krasznahorkay, H. Matsubara, K. Matsuyanagi, R. Meharchand, F. Molina, K. Muto, K. Nakanishi, A. Negret, H. Okamura, H. J. Ong, T. Otsuka, N. Pietralla, G. Perdikakis, L. Popescu, B. Rubio, H. Sagawa, P. Sarriguren, C. Scholl, Y. Shimbara, Y. Shimizu, G. Susoy, T. Suzuki, Y. Tameshige, A. Tamii, J. H. Thies, M. Uchida, T. Wakasa, M. Yosoi, R. G.T. Zegers, K. O. Zell, J. Zenihiro

Research output: Contribution to journalArticlepeer-review

Abstract

Gamow-Teller (GT) transitions in atomic nuclei are sensitive to both nuclear shell structure and effective residual interactions. The nuclear GT excitations were studied for the mass number A=42, 46, 50, and 54 "f-shell" nuclei in (He3, t) charge-exchange reactions. In the Ca42→Sc42 reaction, most of the GT strength is concentrated in the lowest excited state at 0.6 MeV, suggesting the existence of a low-energy GT phonon excitation. As A increases, a high-energy GT phonon excitation develops in the 6-11 MeV region. In the Fe54→Co54 reaction, the high-energy GT phonon excitation mainly carries the GT strength. The existence of these two GT phonon excitations are attributed to the 2 fermionic degrees of freedom in nuclei.

Original languageEnglish
Article number112502
JournalPhysical Review Letters
Volume112
Issue number11
DOIs
Publication statusPublished - 18-03-2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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