Gamma-Ray Multiplicity Moments from Deeply Inelastic Collisions ofKr86andSm144

Abstract

First, second, and third moments of gamma-ray multiplicity distributions from deeply inelastic collisions have been measured for the system ${}_{}{}^{86}{}_{}{}^{}\mathrm{Kr}$ on ${}_{}{}^{144}{}_{}{}^{}\mathrm{Sm}$ at 490-MeV Kr energy. The average gamma-ray multiplicities are ≈ 21, independent of reaction angle and fragment charge. The multiplicity distributions are broad, with standard deviations of $v\approx 10$, and they have a negative skewness.