Total (p, n) reaction cross-section measurements on 50Ti, 54Cr, and 59Co

Kailas, S. ; Gupta, S. K. ; Mehta, M. K. ; Kerekatte, S. S. ; Namjoshi, L. V. ; Ganguly, N. K. ; Chintalapudi, S. (1975) Total (p, n) reaction cross-section measurements on 50Ti, 54Cr, and 59Co Physical Review C, 12 (6). pp. 1789-1796. ISSN 0556-2813

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The total (p, n) reaction cross sections, integrated over the 4Π solid angle and summed over all neutron groups, for 50Ti, 54Cr, and 59Co have been measured as a function of proton energy in the energy range 3.0-4.9, 2.2-5.2, and 2.0-5.1 MeV in 5 keV steps, respectively. No strong isobaric analog resonances were seen in the data. The fluctuations in the excitation functions were analyzed to extract <Γ>av values using the "counting of maxima" method. The excitation functions, averaged over 100 keV energy interval reveal prominent intermediate width structures in the case of 50Ti. All the three excitation functions were averaged over suitable energy intervals and compared with the total reaction cross sections calculated utilizing the optical model. The data on 59Co and 54Cr agreed, while the data on 50Ti indicated a marked discrepancy with these optical model calculations. In the latter case, detailed Hauser-Feshbach (HF) and Hauser-Feshbach-Moldauer (HFM) calculations were carried out. The HFM calculations fit the data quite well. The importance of σ(p, n) measurements in determining the imaginary potential of the optical model at sub-Coulomb energies has been indicated.

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Source:Copyright of this article belongs to American Physical Society.
ID Code:15707
Deposited On:13 Nov 2010 12:41
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