Shell effects in damped collisions of Sr-88 with Yb-176 at the Coulomb barrier energy
Kozulin, E. M., Knyazheva, G. N., Dmitriev, S. N., Itkis, I. M., Itkis, M. G., Loktev, T. A., Novikov, K. V., Baranov, A. N., Trzaska, W., Vardaci, E., Heinz, S., Beliuskina, O., & Khlebnikov, A. S. V. (2014). Shell effects in damped collisions of Sr-88 with Yb-176 at the Coulomb barrier energy. Physical Review C, 89(1), Article 014614. https://doi.org/10.1103/PhysRevC.89.014614
Published inPhysical Review C
© 2014 American Physical Society. Published in this repository with the kind permission of the publisher.
[Introduction] This work is a study of the influence of shell effects on the formation of binary fragments in damped collision. We have investigated binary reaction channels of the composite system with Z = 108 produced in the reaction 88 Sr + 176 Yb at an energy slightly above the Bass barrier ( E c.m. /E Bass = 1 . 03). Reaction products were detected by using the two-arm time-of-flight spectrometer CORSET at the K130 cyclotron of the Department of Physics, University of Jyv ̈ askyl ̈ a. The mass-energy distribution of primary binary fragments has been measured. For targetlike fragments heavier than 190 u, which correspond to a mass transfer as large as twenty nucleons or more, an enhancement of the yields is observed. This striking result can be ascribed to the proton shells at Z = 28 and 82 and implies the persistence of the shell effects in the formation of reaction fragments even for large mass transfers.
PublisherAmerican Physical Society
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