MISSING MOMENTUM VECTOR IN THE AU-197(NE-20F-1,F-2,PLF) REACTION AT 15 MEV/U

摘要

Projectile-like fragments (PLF's) emitted in damped collisions of 15 MeV/u Ne-20 ions with Au-197 were observed in coincidence with two fission fragments. For given detection angles of the PLF's differential and energy-integrated fission probabilities were obtained and the average missing momentum vectors were deduced by using improved analysis methods of the fission fragment angular correlation. The average missing momentum vectors were found to point in the direction of the observed PLF, with a systematic deviation towards beam direction for larger mass transfers. The missing momentum thus appears to mainly originate from the sequential decay of the PLF's. [References: 26]