Study of alpha decay of super heavy elements using S-MATRIX and wkb methods
DSpace at IIT Bombay
View Archive InfoField | Value | |
Title |
Study of alpha decay of super heavy elements using S-MATRIX and wkb methods
|
|
Creator |
PREMA, P
MAHADEVAN, S SHASTRY, CS BHAGWAT, A GAMBHIR, YK |
|
Subject |
relativistic mean-field
microscopic description ground-state half-lives scattering nuclei model potentials resonances alpha decay superheavy elements wkb s-matrix |
|
Description |
A comparative study of the S-matrix and the WKB methods for the calculation of the half widths of alpha decay of super heavy elements is presented. The extent of the reliability of the WKB methods is demonstrated through simple illustrative examples. Detailed calculations have been carried out using the microscopic alpha-daughter potentials generated in the framework of the double-folding model using densities obtained in the relativistic mean field theories. We consider alpha-nucleus systems appearing in the decay chains of super heavy parent elements having A = 277, Z = 112 and A = 269, Z = 110. For negative and small positive log T-1/2 values the results from both methods are similar even though the S-matrix results should be considered to be more accurate. However, when log inverted perpendicular(1/2) values are large and positive, the width associated with such state is infinitesimally small and hence calculation of such width by the S-matrix pole search method becomes a numerically difficult problem. We find that overall, the WKB method is reliable for the calculation of half lives of alpha decay from heavy nuclei.
|
|
Publisher |
WORLD SCIENTIFIC PUBL CO PTE LTD
|
|
Date |
2011-09-02T02:29:16Z
2011-12-26T12:59:55Z 2011-12-27T05:53:05Z 2011-09-02T02:29:16Z 2011-12-26T12:59:55Z 2011-12-27T05:53:05Z 2008 |
|
Type |
Article
|
|
Identifier |
INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS, 17(4), 611-629
0218-3013 http://dx.doi.org/10.1142/S0218301308010039 http://dspace.library.iitb.ac.in/xmlui/handle/10054/12942 http://hdl.handle.net/10054/12942 |
|
Language |
en
|
|