Emission of High-Energy Alpha Particles in the Interaction of Ca-48 Nuclei with Tantalum, Gold, and Uranium Nuclei at 280 MeV

摘要

The energy spectra of alpha particles from reactions induced by 280-MeV Ca-48 beams incident to Ta-181, Au-197, and U-238 targets were measured at an angle of 0 degrees by means of a high-resolution magnetic analyzer (MAVR setup). The sensitivity of the procedure used made it possible to measure alpha-particle yields that are five to six orders of magnitude less than the maximum yield. The cross section for the formation of alpha particles is shown to be dependent on their binding energy in the target nucleus. The experimental data obtained from these measurements were analyzed on the basis of the model of two- and three-body reaction channels and the model of moving sources.