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We have systematically studied the level density parameter, nuclear level density and decay width of neutron and fission of superheavy nuclei. This paper is validated by comparing with available experiments for 2 3 6 U and 2 4 0 Pu. The angular dependence of level density parameter, level densities and ratio of Γ n and Γ f the thermal excitation energy (U) have been studied in the superheavy region 1 0 4 ≤ Z ≤ 1 1 8. The role of entrance channel parameter on decay width of neutron and fission has been studied both in cold and hot fusion reactions in the superheavy region 1 0 4 ≤ Z ≤ 1 1 8. Systematic variation of Γ n and Γ f is observed in both the cases. Finally, predicted Γ n / Γ tot for the synthesis of superheavy nuclei Z = 1 1 9 and 120. [ABSTRACT FROM AUTHOR]

We explored one and two proton radioactivity in 141–229Tm nucleus isotopes. An effective liquid drop model is used to calculate the proton decay half-lives. The WKB integral is used to calculate the penetration probability. The half-lives of one and two proton radioactivity are compared to those of β ± and α decay. Furthermore, proton-decay, beta-decay, and alpha-decay half-lives are compared to experimental results. The result derived from the current investigation is consistent with previous experimental data. Further, we have identified potential proton emitters and β - emitters in the unexplored regions of mass number range 141 ≤ Z ≤ 146 and 48 β - -emitters in the mass number range 182 ≤ Z ≤ 229 for Thulium nuclei. The existence of positive Q values for these isotopes was estimated through theoretical calculations, as experimental data on mass excesses in these regions are currently unavailable. These newly found isotopes have potential use in medical imaging, treatment of cancer, dosimetric studies, and radio-guided surgery. [ABSTRACT FROM AUTHOR]

In this paper, we systematically studied half-lives of the different decay modes using various theoretical models such as the unified fission model (UFM) and the effective liquid drop model. Beta-decay half-lives were evaluated using semi-empirical formulae available in the literature. We compared half-lives of all the studied decay modes and identified shorter half-lives among the same in 2 0 5 − 2 3 3 Ac nuclei. We investigated the actinium series which is similar to the thorium series. Among these decay series, alpha-emitting isotopes show great promise for cancer treatment because of their short path length and high-energy transfer of radiation. Furthermore, we predicted the decay chains of the actinium isotopes. All the decay series of actinium ends with the formation of stable nuclei or with longer half-lives. The predicted decay series and new isotopes during the decay process are helpful in the field of medicine and radiotherapy. [ABSTRACT FROM AUTHOR]

Quasifission barriers were studied in the superheavy region 1 0 4 ≤ Z ≤ 1 2 6 using different projectile-target combinations. The different entrance channels parameters on quasifission barriers give an insight into the formation of compound nuclei and quasifission process. The quasifission barriers are more systematic for χ m = 0. 2 5 χ CN + 0. 7 5 χ eff . The effect of compound nucleus fissility χ CN and effective entrance channel fissility χ eff on quasifission barriers were investigated. The quasifission barriers are strongly influenced by χ CN and χ eff entrance channel parameters. The detailed investigations of entrance channel parameters on quasifission barriers provide a thorough understanding of compound nuclei formation in the superheavy element in the region 1 0 4 ≤ Z ≤ 1 2 6. Eventually, this study helps in the selection of projectile-target combinations to synthesis of superheavy nuclei. [ABSTRACT FROM AUTHOR]

The existence of neutron magic number 184 is demonstrated through the cluster decay studies. The alpha and black cluster radioactivity have been studied in the superheavy region 1 0 4 ≤ Z ≤ 1 2 6 using modified generalized liquid drop model (MGLDM). The values obtained from this work were compared with that of experiments. During the study of black cluster radioactivity, surprisingly it is observed that the shortest half-lives of cluster decay in all superheavy elements are observed for daughter neutron number 184 and nearly equal to that. This is a clear evidence for the existence of the neutron magic number N = 1 8 4. This study is useful in the understanding of superheavy element nuclei structure. [ABSTRACT FROM AUTHOR]

In the present work, we have considered the total potential as the sum of the coulomb and proximity potential. We have used the recent proximity function to calculate the nuclear potential. The calculated logarithmic half-lives correspond to fission, cluster and alpha decay are compared with that of experiments. We also identified the most probable decay mode by studying branching ratios of these different decay modes. The competition between different decay modes such as fission, cluster radioactivity and alpha decay finds an important role in nuclear structure. [ABSTRACT FROM AUTHOR]