R matrix microscopic calculation for emission of 12C, 14C and 16O in the single particle model

Numerical calculations are made for the overlap integrals, penetrability factors and decay constants of α, 12C, 14C and 16O emission from some even Ra and Th isotopes, in the single particle model with harmonic oscillator wave functions. Comparisons are made with the experimental decay constants known for some heavier cluster emissions.(authors)