The 20Ne+ 159Tb reaction studied with the KX-ray method at 15 [formula omitted

Abstract

Employing the KX-ray method, in which coincidences are measured between projectile-like fragments (PLF) and the characteristic KX rays from the target-like fragments (TLF), partial cross sections dσ-(Z PLF , Z TLF )/ dΩ PLF were obtained for the 20Ne+ 159Tb reaction at E lab = 294 MeV for both the quasi-elastic (QE) and the deep-inelastic (DI) components. By in addition measuring triple coincidences with charged particles at back angles the results could be corrected for charged particle evaporation from the TLF. Primary PLF cross sections were reconstructed for both components and the corresponding probabilities for sequential charged particle decay of the fragments were deduced. The very different behaviour of the QE and DI components will be discussed. As in a previous study of the 14N+ 159Tb reaction large cross sections are observed for channels in which only nucleons and α-particles are emitted. Statistical model calculations were performed to deduce the excitation energy distribution of the primary PLF's. Comparison with other methods to reconstruct primary cross sections are made. The predictions of several models are evaluated.