Half lives and Q values of nuclei appearing in the α-decay chains of recently reported new isotopes

H. M. Devaraja, Y. K. Gambhir, A. Bhagwat, M. Gupta, S. Heinz, G. Münzenberg

Research output: Contribution to journalArticle

Abstract

Microscopic investigations for the observed properties of the recently reported five unstable new isotopes are carried out. The ground state properties are calculated in the relativistic mean field (RMF) framework and the results reproduce the experiment well as expected. The α-decay lifetimes are calculated in the double folding model using WKB approximation which requires the relevant Q values of α-decay and the α-daughter (V αD ) potential. The latter is obtained by folding the effective M3Y nucleon nucleon potential with the RMF nucleon density distributions for the daughter nucleus and that of the α particle which is assumed to be of Gaussian shape. The corresponding decay half-lives obtained by using available phenomenological expression are also presented, discussed and compared. It is observed that the use of accurate Q values (very close to the experimental values) is crucial for the reliable description of the experimental α-decay half-lives in the WKB framework.

Original languageEnglish
Article number304
JournalRomanian Journal of Physics
Volume63
Issue number9-10
Publication statusPublished - 01-01-2018

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half life
isotopes
nuclei
decay
folding
Wentzel-Kramer-Brillouin method
nucleon potential
density distribution
life (durability)
ground state

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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abstract = "Microscopic investigations for the observed properties of the recently reported five unstable new isotopes are carried out. The ground state properties are calculated in the relativistic mean field (RMF) framework and the results reproduce the experiment well as expected. The α-decay lifetimes are calculated in the double folding model using WKB approximation which requires the relevant Q values of α-decay and the α-daughter (V αD ) potential. The latter is obtained by folding the effective M3Y nucleon nucleon potential with the RMF nucleon density distributions for the daughter nucleus and that of the α particle which is assumed to be of Gaussian shape. The corresponding decay half-lives obtained by using available phenomenological expression are also presented, discussed and compared. It is observed that the use of accurate Q values (very close to the experimental values) is crucial for the reliable description of the experimental α-decay half-lives in the WKB framework.",
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Half lives and Q values of nuclei appearing in the α-decay chains of recently reported new isotopes. / Devaraja, H. M.; Gambhir, Y. K.; Bhagwat, A.; Gupta, M.; Heinz, S.; Münzenberg, G.

In: Romanian Journal of Physics, Vol. 63, No. 9-10, 304, 01.01.2018.

Research output: Contribution to journalArticle

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T1 - Half lives and Q values of nuclei appearing in the α-decay chains of recently reported new isotopes

AU - Devaraja, H. M.

AU - Gambhir, Y. K.

AU - Bhagwat, A.

AU - Gupta, M.

AU - Heinz, S.

AU - Münzenberg, G.

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AB - Microscopic investigations for the observed properties of the recently reported five unstable new isotopes are carried out. The ground state properties are calculated in the relativistic mean field (RMF) framework and the results reproduce the experiment well as expected. The α-decay lifetimes are calculated in the double folding model using WKB approximation which requires the relevant Q values of α-decay and the α-daughter (V αD ) potential. The latter is obtained by folding the effective M3Y nucleon nucleon potential with the RMF nucleon density distributions for the daughter nucleus and that of the α particle which is assumed to be of Gaussian shape. The corresponding decay half-lives obtained by using available phenomenological expression are also presented, discussed and compared. It is observed that the use of accurate Q values (very close to the experimental values) is crucial for the reliable description of the experimental α-decay half-lives in the WKB framework.

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