Threshold Laws for Four-Particle Fragmentation: Mass Effects

摘要

The threshold laws for break-up of an atomic particle into N charged fragments reflect dynamics of long-range Coulomb correlation. Progress in experimental technique makes accessible a broader variety of essential parameters: fragment charges and masses. Some sets of fragments for N = 4 case are discussed with particular emphasis on mass-dependence of the threshold behaviour. New sets are found with low values of threshold indices suitable for experimental observation.