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Laser Optics & Photonics and Atomic & Plasma Science 2018
J u l y 1 6 - 1 7 , 2 0 1 8
P r a g u e , C z e c h R e p u b l i c
Page 103
American Journal of Computer Science and Information Technology
ISSN: 2349-3917
E u r o S c i C o n J o i n t E v e n t o n
Laser Optics & Photonics and
Atomic & Plasma Science
P
reformation for alpha-particle for favoured transitions is calculated using proximity potential. Calculations are done using
an indirect semi-empirical method in which experimental values of half-lives are taken into consideration. Values of assault
frequency are determined using a modified formula, and penetrability is calculated using proximity potential. Calculations are
carried out for favoured transitions of all alpha emitters, i. e., 179 e-e, 80 e-o, 98 o-e and 55 o-o alpha emitters. As expected from
the shell model, preformation values obtained are highest for e-e alpha emitters, followed by e-o and o-e alpha emitters. The
lowest values are obtained for o-o alpha emitters. It is also found that preformation values are highest for transitions originating
in the ground state than for transitions originating in the isomeric state. This suggests that there is greater preformation of
alpha-particle in the ground state than in the isomeric state. The preformation values also show a distinct minima at the neutron
magic number, N=126. Comparison of these semi-empirical values is also done with values obtained by microscopic methods.
Comparison indicates that the trend of values obtained by the two methods is quite similar. As there is no universal formula for
calculating the assault frequency, hence, the preformation values of the above semi-empirical method can be brought very close
to the microscopic values by adjusting the assault frequency.
chinmoy.phookan@gmail.comPreformation of alpha-particle for favoured
transitions using proximity potential
C K Phookan
Haflong Government College, India
Am J Compt Sci Inform Technol 2018, Volume 6
DOI: 10.21767/2349-3917-C1-003