Velocity and angular distributions of evaporation residues from <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">induced</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>32</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span> reactions

J. D. Hinnefeld; J. J. Kolata; D. J. Henderson; R. V. F. Janssens; D. G. Kovar; K. T. Lesko; G. Rosner; G. S. F. Stephans; A. M. van den Berg; B. D. Wilkins; F. W. Prosser; S. V. Reinert; P. L. Gonthier

doi:10.1103/PhysRevC.36.989

Velocity and angular distributions of evaporation residues from ${}^{32}{induced}$ reactions

J. D. Hinnefeld, J. J. Kolata, D. J. Henderson, R. V. F. Janssens, D. G. Kovar, K. T. Lesko, G. Rosner, G. S. F. Stephans, A. M. van den Berg, B. D. Wilkins, F. W. Prosser, S. V. Reinert, and P. L. Gonthier

Phys. Rev. C 36, 989 – Published 1 September 1987

Abstract

Velocity distributions of mass-resolved evaporation residues from reactions of ${}^{32}S$ with ${}^{12}C$ , ${}^{24}{Mg}$ , ${}^{27}{Al}$ , ${}^{28}{Si}$ , and ${}^{40}{Ca}$ have been measured at bombarding energies of 194, 239, and 278 MeV using time-of-flight techniques. In all cases, the observed shifts in the velocity centroids relative to the values expected for complete fusion are consistent with a previously reported parametrization of a threshold for onset of incomplete fusion. Angular distributions were measured and total cross sections extracted for the ${}^{32}{Mg}$ system at all three energies. A comparison with existing results for ${}^{32}{Mg}$ at lower energies, and with other systems leading to the ${}^{56}{Ni}$ compound nucleus, suggests two different types of compound-nuclear limitations to complete fusion at higher energies.