Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8144883 | Chinese Journal of Physics | 2018 | 28 Pages |
Abstract
α-particle preformation probability (P0) is calculated for favoured transitions of all α-emitters. An indirect approach is employed in which P0 is given by the ratio of the experimental values of α-decay constant and theoretically determined values of assault frequency and the penetrability. The proximity potential is used for determination of the penetrability, and the assault frequency is calculated through a modified formula. Analysis of the results show that P0 is highest for the even-even type, and lowest for the odd-odd type α-emitter. Also, it is noted that P0 is higher for transitions originating in the ground state, and lower for transitions originating in the isomeric state. This suggests that there is greater preformation of α-particle in the ground state than in the isomeric state. P0 values show a distinct minima at the neutron magic number, N = 126. Also, it is noted that values of α-decay fraction (fα) reported in the literature for a few α-emitters are, either, not consistent, or only limiting values are available. This raises the possibility of determining improved values of P0 if accurate values of fα are known in future.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Atomic and Molecular Physics, and Optics
Authors
C.K. Phookan,