Isovector quadrupole resonance in 13C(γ, n) reaction

Kazushige Maeda, Ito Sachiko, Hideaki Itoh, Osamu Konno, Hideto Matsuyama, Tetsuya Murakami, Takaoki Sasaki, Toshimi Suda, Motonobu Takeya, Tatuo Terasawa

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


The photoneutron cross section for 13C was measured in the tagged photon energy range Eγ = 17-70 MeV. Substantial forward to backward asymmetry was observed above the giant dipole resonance region. The observed asymmetries were analyzed by the direct and semi-direct model, assuming two isovector E2 resonances, which locate at Ex = 30:9 ± 1:5 MeV with Γ = 8 ± 6 MeV and Ex = 43:2 ± 1:8 MeV with Γ = 13 ± 6 MeV. They are identified as the T< and T> isospin components of the isovector quadrupole strengths, which exhaust most of the sum rule.

Original languageEnglish
Article number034201
JournalJournal of the Physical Society of Japan
Issue number3
Publication statusPublished - 2006 Mar


  • Giant resonance
  • Isovector
  • Photonuclear reaction
  • Tagged photon


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