Alpha radioactivity in heavy and super heavy elements

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

doi:10.1016/j.nuclphysa.2009.04.012

Cited by 70 publications

(22 citation statements)

References 49 publications

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“…Since the interaction potential between the α particle and daughter nucleus plays an important role in the theoretical calculation of the penetration probability and half-life of α decay, the calculation of this potential becomes important in describing the decay process. In most cases, a one-dimensional potential is considered for the α decay process, and penetration probability is calculated using WKB approximation [1][2][3][4][5][6][7]. Among these, various models incorporating parent and daughter ground-state (GS) deformations are developed, such as the unified model for α decay and α capture [8], generalized density-dependent cluster model [9], and Coulomb and proximity potential model for deformed nuclei [10,11], which show the reduction of barrier height due to quadrupole deformation.…”

Section: Introductionmentioning

confidence: 99%

Half-life of sphericalαemitters and intrinsic properties of nuclei

2015

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The quantum mechanical effects are investigated on the half-life of α decay. To this aim the penetration probability in α decay of spherical isotopes of 146 Sm, 148 Sm, 148 Gd, and 224 Ra is calculated by employing coupled channel formalism by considering the effects of surface vibrations in the daughter nucleus; the obtained results are compared with those calculated by the semiclassical WKB approximation using two versions of the proximity potential. It is shown that by including low-lying excitation states the results are modified, in better agreement with experimental data.

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Section: Introductionmentioning

confidence: 99%

Half-life of sphericalαemitters and intrinsic properties of nuclei

2015

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“…The CPPM was used by K.P. Santhosh et al and is well established in predicting the barrier penetrability and half-life of decay of light and heavy clusters in heavy and super-heavy region [44][45][46][47][48]. Also, the CPPM is used for predicting the decay characteristics of proton halo nuclei [49] and neutron halo nuclei [50] in heavy and superheavy region.…”

Section: Resultsmentioning

confidence: 99%

Theoretical Study on the Formation of 1-neutron and 2-neutron Halo Nuclei via Decay of Elements in Super-Heavy Region

Biju¹,

Prathapan²,

Anjali³

2020

J. Nucl. Phy. Mat. Sci. Rad. A.

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The possibility for the existence of 1-neutron and 2-neutron halo nuclei through the decay of even-even nuclei 270-316116, 272-318118 and 278-320120 in the super-heavy region is studied within the frame work of the Coulomb and Proximity Potential Model (CPPM). Halo structure in neutron rich nuclei with Z<=20 is identified by calculating the neutron separation energies and on the basis of potential energy considerations. The 1n + core configuration of proposed 1-neutron halo nuclei between z=10 and Z=20 is found shifted to 2n + core configuration in higher angular momentum states. The calculation of half-life of decay is performed by considering the proposed halo nuclei as spherical cluster and as deformed nuclei with a rms radius. Except for 15C, the half-life of decay is found decreased when the rms radius is considered. Only the 1-neutron halo nuclei 26F and 55Ca showed half-lives of decay which are less than the experimental limit. None of the proposed 2-neutron halo nuclei have shown a half-life of decay lower than the experimental limit. Also, the probability for the emission of neutron halo nuclei is found to be less in super-heavy region when compared with the clusters of same isotope family. Further, neutron shell closure at neutron numbers 150, 164 and 184 is identified form the plot of log10 T1/2 verses the neutron number of parents. The plots of Q-1/2 verses log10 T1/2 and -ln P verses log10 T1/2 for various halo nuclei emitted from the super-heavy elements are found to be linear showing that Geiger-Nuttall law is applicable to the emission of neutron halo also.

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“…The decay width is expressed as a product of two model-dependent quantities: the frequency of oscillations in the fission mode ν f (or the zero point vibration energy E ν = hν f /2) and the penetration probability P. The super asymmetric fission model (SAFM) [68,69], effective liquid drop model (ELDM) [70][71][72], generalized liquid drop model (GLDM) [44], Coulomb and Proximity Potential Model for deformed nuclei (CPPMDN) [73] belong to this category. By interpreting the cluster preformation probability as the penetration probability through the prescission (inner) part of the barrier, the fission-like models turned out to be equivalent with the preformed-cluster models in describing α decay and cluster radioactivity [69].…”

Section: Semiclassical Formalisms For α Decaymentioning

confidence: 99%

Systematic research on α-decay rates of spherical and deformed nuclei

Ren

2015

Annals of Physics

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Alpha radioactivity in heavy and super heavy elements

Cited by 70 publications

References 49 publications

Half-life of sphericalαemitters and intrinsic properties of nuclei

Half-life of sphericalαemitters and intrinsic properties of nuclei

Theoretical Study on the Formation of 1-neutron and 2-neutron Halo Nuclei via Decay of Elements in Super-Heavy Region

Systematic research on α-decay rates of spherical and deformed nuclei

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