Sharan, M. K. ; Agarwal, Y. K. ; Baba, C. V. K. ; Chakrabarty, D. R. ; Datar, V. M. (1993) Ultradipole photon production in 40 and 50 MeV α-nucleus collisions Physical Review C, 48 (6). pp. 2845-2854. ISSN 0556-2813
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Official URL: http://prc.aps.org/abstract/PRC/v48/i6/p2845_1
Related URL: http://dx.doi.org/10.1103/PhysRevC.48.2845
Abstract
γ-ray yields in the energy range ~5-35 MeV have been measured in the reactions α+197Au and 159Tb at Eα=40 MeV and α+197Au, 116Sn, natAg, and 59Co at Eα=50 MeV at θγ=90°. Angular distribution measurements have been carried out for the heaviest and the lightest target at Eα=50 MeV. A reasonably good agreement with the statistical model calculations is obtained for photon energies up to the giant dipole resonance region. A nonstatistical component is observed at higher γ-ray energies for all the systems studied. An attempt to understand the production mechanism of the nonstatistical part is made in terms of the potential bremsstrahlung and the incoherent nucleon-nucleon bremsstrahlung processes. While the calculations give the right order of magnitude of the measured cross sections for the highest γ-ray energies, they fail to reproduce the measured angular distributions and the cross sections in the entire γ-ray energy range.
Item Type: | Article |
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Source: | Copyright of this article belongs to The American Physical Society. |
ID Code: | 37255 |
Deposited On: | 22 Apr 2011 10:34 |
Last Modified: | 22 Apr 2011 10:34 |
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