Experimental differential cross sections, level densities, and spin cutoffs as a testing ground for nuclear reaction codes

Journal Article · 08 November 2013 · Physical Review. C, Nuclear Physics

DOI: https://doi.org/10.1103/PhysRevC.88.054607 · OSTI ID:1254902

Voinov, Alexander V. ^[1]; Grimes, Steven M. ^[1]; Brune, Carl R. ^[1]; Burger, Alexander ^[2]; Gorgen, Andreas ^[2]; Guttormsen, Magne ^[2]; Larsen, Ann -Cecilie ^[2]; Massey, Thomas N. ^[1]; Siem, Sunniva ^[2]

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1. Ohio Univ., Athens, OH (United States)
2. Univ. of Oslo, Oslo (Norway)

Proton double-differential cross sections from ⁵⁹Co(α,p)⁶²Ni, ⁵⁷Fe(α,p)⁶⁰Co, ⁵⁶Fe(⁷Li,p)⁶²Ni, and ⁵⁵Mn(⁶Li,p)⁶⁰Co reactions have been measured with 21-MeV α and 15-MeV lithium beams. Cross sections have been compared against calculations with the empire reaction code. Different input level density models have been tested. It was found that the Gilbert and Cameron [A. Gilbert and A. G. W. Cameron, Can. J. Phys. 43, 1446 (1965)] level density model is best to reproduce experimental data. Level densities and spin cutoff parameters for ⁶²Ni and ⁶⁰Co above the excitation energy range of discrete levels (in continuum) have been obtained with a Monte Carlo technique. Furthermore, excitation energy dependencies were found to be inconsistent with the Fermi-gas model.

• Research Organization: Ohio Univ., Athens, OH (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: FG02-88ER40387
• OSTI ID: 1254902
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 88, Issue 5; ISSN 0556-2813
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English