Shell effects in damped collisions of Sr-88 with Yb-176 at the Coulomb barrier energy
Kozulin, E., Knyazheva, G., Dmitriev, S., Itkis, I., Itkis, M., Loktev, T., . . . Khlebnikov, a. (2014). Shell effects in damped collisions of Sr-88 with Yb-176 at the Coulomb barrier energy. Physical Review C, 89 (1), 014614. doi: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