Cluster radioactivity of superheavy nuclei 290–310120 using different proximity functions

Nagaraja, A. M.; Manjunatha, H. C.; Sowmya, N.; Manjunath, N.; Raj, S. Alfred Cecil

doi:10.1140/epjp/s13360-020-00834-6

Cited by 20 publications

(3 citation statements)

References 42 publications

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“…The study of cluster radioactivity (CR) has received much attention in recent years [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. CR is the spontaneous emission of fragments heavier than the α particle and relatively lighter than the binary fission products.…”

Section: Introductionmentioning

confidence: 99%

Cluster radioactivity around shell closures: correlation of half-lives with the energy levels of daughter nuclei

Ismail¹,

Adel²

2022

J. Phys. G: Nucl. Part. Phys.

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The emission of Be, C, O, and Ne clusters from seven parent nuclei with neutron numbers around the neutron magicities N = 82, and 126 are considered. The universal decay law (UDL) formula, as well as the double-folding model derived from M3Y-Paris NN interaction with zero- and ﬁnite-range exchange components, are utilized to compute the half-life time for 23 cluster decay processes. The calculations utilizing the UDL formula show satisfactory agreement with the experimental data. The reliable UDL formula is used to calculate log Tcfor more than 1500 cluster emitters and its variation with the neutron number, Nd, of the daughter nuclei is presented. The behavior of log Tc with neutron number variation is studied and correlated to the energy levels of the daughter nuclei. For neutron number Nd larger than the neutron magic number, log Tc increases almost linearly with increasing Ndleaving the daughter nuclei in most cases with the same nuclear spin value. This linear behavior of log Tc results from equal nuclear spin values of the daughter nuclei. At the magic neutron number, the nuclear spin changes strongly and as a result the behavior of log Tc is reversed, increases as Nd decreases and reaches to a maximum value at Nd value corresponds to emitting all the neutrons in the cluster from levels below the neutron magic number gap. Leaving the daughter nuclei in the same spin produces almost linear variation of log Tc. For protons in various clusters emitted from the same level or the same group of levels, log Tc has almost the same value and the same behavior of variation with Nd. Also, the values of log Tc for speciﬁc type of cluster depend on the N to Z ratio for diﬀerent isotopes of this cluster. From the available nuclear spin values, the neutron energy levels around the magic numbers are presented.

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Section: Introductionmentioning

confidence: 99%

Cluster radioactivity around shell closures: correlation of half-lives with the energy levels of daughter nuclei

Ismail¹,

Adel²

2022

J. Phys. G: Nucl. Part. Phys.

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“…It is also evident from the literature that mass asymmetry in fission due to the fragmentation during the formation of superheavy nuclei [16]. The different decay modes such as /cluster-decay, heavy particle radioactivity and spontaneous fission half-lives are dominant in the heavy and superheavy region [17][18][19][20][21][22][23][24][25][26][27][28][29][30]. The main decay mode depends on the binding energy and type of fragmentation structure connected with them.…”

Section: Introductionmentioning

confidence: 99%

Investigations on Fission of Compound Nuclei with Z=120

Manjunatha

Sowmya

et al. 2021

Braz J Phys

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“…The cluster decay half-lives are also evaluated using semi-microscopic methods [41][42][43]. Earlier researchers studied different decay modes using different models and semi-empirical relations to evaluate the half-lives [44][45][46][47][48][49][50][51][52][53][54][55][56][57].…”

Section: Introductionmentioning

confidence: 99%

Decay of dinuclear systems formed from dubnium

et al. 2021

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The radioactivity of the superheavy nuclei 250−275 Db is studied and presented using the Coulomb and proximity potentials. The half-lives corresponding to different decay modes such as α, cluster decay ( 12 C, 14 N, 18,20 O, 23 F, 20 Ne, 34 S, 28 Mg and 40 Ca) and spontaneous fission in the superheavy nuclei 250−275 Db are studied. The studied half-lives are compared with the available experiments. The decay modes and the branching ratios of isotopes of dubnium are presented. The isotopes of dubnium, 254−263 Db, are identified as α emitters, whereas isotopes such as 250−253 Db and 264−275 Db are identified as having spontaneous fission. The identified alpha emitting isotopes of dubnium have decay energies from 6 MeV to 10 MeV and half-lives 1 ms to 100 s. The possible projectile-target combinations to synthesise the superheavy nuclei 253−263 Db were predicted. The fusion of spherical projectile and target yields larger evaporation residue cross-sections.

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Cluster radioactivity of superheavy nuclei 290–310120 using different proximity functions

Cited by 20 publications

References 42 publications

Cluster radioactivity around shell closures: correlation of half-lives with the energy levels of daughter nuclei

Cluster radioactivity around shell closures: correlation of half-lives with the energy levels of daughter nuclei

Investigations on Fission of Compound Nuclei with Z=120

Decay of dinuclear systems formed from dubnium

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