Energy and angular momentum transfers in equilibrium and pre-equilibrium 158Gd(α, xn) reactions

M. J.A. De Voigt, K. Maeda, H. Ejiri, T. Shibata, K. Okada, T. Motobayashi, M. Sasao, T. Kishimoto, H. Suzuki, H. Sakai, A. Shimizu

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10 Citations (Scopus)


Neutron time-of-flight spectra and γ-ray multiplicities were measured in coincidence with discrete γ-rays for specific exit channels in the 158Gd(α, xn) reactions at Eα = 70 MeV. The neutron energy spectra and angular distributions were analysed in terms of equilibrium and non-equilibrium decay processes. Significant emission of non-equilibrated neutrons was found, amounting to about 40 %, 25 % and 15 % of the total neutron emission in the 4n, 5n and 6n exit channels, respectively. The corresponding average kinetic energies in this precompound phase were around 12, 8 and 4.5 MeV. The angular momentum carried away by the neutrons was found to be rather constant for all exit channels and on the average about 3h{stroke} units. It is found that the total energy and angular momentum removed by the neutrons and γ-rays agrees within the experimental errors with the calculated values for the compound nucleus.

Original languageEnglish
Pages (from-to)160-172
Number of pages13
JournalNuclear Physics, Section A
Issue number1
Publication statusPublished - 1982 Apr 26


  • Nuclear reactions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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