Semi-empirical formula for spontaneous fission half life time

Santhosh, K. P.; Biju, R.K.; Sahadevan, Sabina

doi:10.1016/j.nuclphysa.2009.10.160

Cited by 68 publications

(31 citation statements)

References 35 publications

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“…6. It is obvious from the plot that the 34 Si cluster has the maximum cluster formation probability in these parents and it has a ) 6 7 ( n   structure.…”

Section: Resultsmentioning

confidence: 99%

“…The competition between the alpha decay and spontaneous fission half-lives of even-even nuclei with Z = 100-122 is studied [33] using the present model and the phenomenological formula for spontaneous fission. Recently we have proposed a semi empirical formula [34] for determining the spontaneous fission half lives which is applied to the mass region from 232 Th to 286 114. A brief description of cluster formation probability is given in section 2, the details of the Coulomb and proximity potential model are given in section 3 and the results and discussions are given in section 4.…”

Section: Introductionmentioning

confidence: 99%

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Cluster formation probability in the trans-tin and trans-lead nuclei

2010

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Within our fission model, the Coulomb and proximity potential model (CPPM) cluster formation probabilities are calculated for different clusters ranging from carbon to silicon for the parents in the trans-tin and trans- lead regions. It is found that in trans-tin region the 12^C, 16^O, 20^Ne and 24^Mg clusters have maximum cluster formation probability and lowest half lives as compared to other clusters. In trans-lead region the 14^C, 18, 20^O, 23^F, 24,26^Ne, 28,30^Mg and 34^Si clusters have the maximum cluster formation probability and minimum half life, which show that alpha like clusters are most probable for emission from trans-tin region while non-alpha clusters are probable from trans-lead region. These results stress the role of neutron proton symmetry and asymmetry of daughter nuclei in these two cases.Comment: 20 pages, 6 figure

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“…6. It is obvious from the plot that the 34 Si cluster has the maximum cluster formation probability in these parents and it has a ) 6 7 ( n   structure.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cluster formation probability in the trans-tin and trans-lead nuclei

2010

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“…The formula obtained for logarithmic half-life time for spontaneous fission is given by are the fissionability parameter and the neutron excess of the decaying parent nuclei respectively. It is to be noted that the semi-empirical formula works well for the nuclei in the mass regions 232 Th to 286 114 [77].…”

Section: Semi-empirical Relation Of Santhosh Et Almentioning

confidence: 91%

“…The spontaneous fission half lives of the parent isotopes under study have been evaluated using the semi-empirical relation of Santhosh et al, [77] discussed below.…”

Section: Spontaneous Fission Half Livesmentioning

confidence: 99%

“…A new semi empirical formula for explaining spontaneous fission was developed by Santhosh et al, [77] by making least squares fit to the available experimental data. The formula obtained for logarithmic half-life time for spontaneous fission is given by are the fissionability parameter and the neutron excess of the decaying parent nuclei respectively.…”

Section: Semi-empirical Relation Of Santhosh Et Almentioning

confidence: 99%

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Heavy particle radioactivity from superheavy nuclei leading to 298114 daughter nuclei

Santhosh

Priyanka

2014

Nuclear Physics A

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Abstract.The feasibility for the alpha decay and the heavy particle decay from the even-even superheavy (SH) nuclei with Z = 116-124 have been studied within the Coulomb and proximity potential model (CPPM). The Universal formula for cluster decay (UNIV) of Poenaru et al., the Universal Decay Law (UDL) of Qi et al., and the Scaling Law of Horoi et al., has also been used for the evaluation of the decay half lives. A comparison of our predicted half lives with the values evaluated using these empirical formulas are in agreement with each other and hence CPPM could be considered as a unified model for alpha and cluster decay studies. The spontaneous fission half lives of the corresponding parents have also been evaluated using the semi-empirical formula of Santhosh et al. Within our fission model, we have studied cluster formation probability for various clusters and the maximum cluster formation probability for the decay accompanying 298 114 reveals its doubly magic behavior. In the plots for log 10 (T 1/2 ) against the neutron number of the daughter in the corresponding decay, the half life is found to be the minimum for the decay leading to 298 114(Z = 114, N = 184) and this also indicate its doubly magic behavior. Most of the predicted half lives are well within the present upper limit for measurements ) 10 ( 30 2 / 1 s T < and the computed alpha half lives for 290,292 116 agrees well with the experimental data. We have thus confidently indicate towards a new island for the cluster radioactivity around the superheavy isotope 298 114 and its neighbors and we hope to receive experimental information about the cluster decay half lives of these considered SHs', hoping to confirm the present calculations.

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