Predictions of alpha decay half lives of heavy and superheavy elements
Abstract
Theoretical estimates for the lifetimes of several isotopes of heavy elements with Z=102 120 are presented by calculating the quantum mechanical tunneling probability in a WKB framework and using microscopic nucleus nucleus potential obtained by folding the densities of interacting nuclei with the DDM3Y effective nuclear interaction. The αdecay half lives calculated in this formalism using the experimental Qvalues are in good agreement over a wide range of experimental data. Half lives are also calculated using Qvalues extracted from two mass formulae. The Viola Seaborg Sobiczewski (VSS) estimates of αdecay half lives with the same Qvalues are presented for comparison. The half life calculations are found to be quite sensitive to the choice of Qvalues. Comparison with the experimental data delineates the inadequacies of older mass predictions in the domain of heavy and superheavy elements as compared to the newer one by Muntian Hofmann Patyk Sobiczewski, and highlights necessity of a more accurate mass formula which can predict Qvalues with even higher precision.
 Publication:

Nuclear Physics A
 Pub Date:
 June 2007
 DOI:
 10.1016/j.nuclphysa.2007.04.001
 arXiv:
 arXiv:nuclth/0703086
 Bibcode:
 2007NuPhA.789..142S
 Keywords:

 27.90.+b;
 23.60.+e;
 21.10.Tg;
 21.30.Fe;
 220<
 =A;
 Alpha decay;
 Lifetimes;
 Forces in hadronic systems and effective interactions;
 Nuclear Theory;
 Astrophysics;
 Nuclear Experiment;
 Quantum Physics
 EPrint:
 18 pages including 5 figures and 1 table