Recent results from the decay studies of high-energy isoscalar giant resonances

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

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Abstract

The direct and statistical neutron decay of the isoscalar giant dipole resonance and a continuum region at higher excitation energy 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 neutron-hole states were analyzed, and estimates for the branching ratios were determined to compare to recent theoretical predictions. The observation of the direct nucleón decay channels helped to separate giant resonance strengths and suppress the underlying background and continuum, which lead to an indication for the existence of the first overtone mode of the isoscalar giant quadrupole resonance.

Original languageEnglish
Pages (from-to)1479-1488
Number of pages10
JournalActa Physica Polonica B
Volume38
Issue number4
Publication statusPublished - Apr 1 2007
Event41st Zakopane Conference on Nuclear Physics - Trends in Nuclear Physics - Zakopane, Poland
Duration: Sep 4 2006Sep 10 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Hunyadi, M., Van Den Berg, A. M., Blasig, N., Csatlós, M., Csige, L., Davids, B., Fujiwara, M., Garg, U., Gulyás, J., Harakeh, M. N., De Huu, M. A., Krasznahorkay, A., Sohler, D., & Wörtche, H. J. (2007). Recent results from the decay studies of high-energy isoscalar giant resonances. Acta Physica Polonica B, 38(4), 1479-1488.