Direct neutron decay of the isoscalar giant dipole resonance

M. Hunyadi, A. M. Van Den Berg, B. Davids, M. N. Harakeh, M. A. De Huu, H. J. Wörtche, M. Csatlós, J. Gulyás, A. Krasznahorkay, D. Sohler, U. Garg, M. Fujiwara, N. Blasi

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Abstract

The direct and statistical neutron decay of the isoscalar giant dipole resonance has been studied in 90Zr, 116Sn, and 208Pb using the (α, α' n) reaction at a bombarding energy of 200 MeV. The spectra of fast decay neutrons populating valence hole states of the Z, N - 1 nuclei were analyzed, and estimates for the branching ratios were determined. The observation of the nucleon-direct-decay channels helped to select giant-resonance strengths and suppress the underlying background and continuum, which led to an indication of the existence of a new mode with L = 2 character, presumably the overtone of the isoscalar giant quadrupole resonance.

Original languageEnglish
Pages (from-to)1407-1414
Number of pages8
JournalPhysics of Atomic Nuclei
Volume70
Issue number8
DOIs
Publication statusPublished - Aug 1 2007

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics

Cite this

Hunyadi, M., Van Den Berg, A. M., Davids, B., Harakeh, M. N., De Huu, M. A., Wörtche, H. J., Csatlós, M., Gulyás, J., Krasznahorkay, A., Sohler, D., Garg, U., Fujiwara, M., & Blasi, N. (2007). Direct neutron decay of the isoscalar giant dipole resonance. Physics of Atomic Nuclei, 70(8), 1407-1414. https://doi.org/10.1134/S1063778807080145