Nuclear structure and decay properties of even–even nuclei in Z = 70−80 drip-line region

Abstract

We study nuclear structure properties for various isotopes of Ytterbium (Yb), Hafnium(Hf), Tungsten(W), Osmium(Os), Platinum(Pt) and Mercury(Hg) in Z = 70 − 80 drip-line region starting from N = 80 to N = 170 within the formalism of relativistic mean field (RMF) theory. The pairing correlation is taken care by using BCS approach. We compared our results with Finite Range Droplet Model(FRDM) and experimental data and found that the calculated results are in good agreement. Neutron shell closure are obtained at N = 82 and 126 in this region. We have also studied probable decay mechanisms of these elements.

Role of pairing on transitional nuclei of the astrophysical interest

“…We kept pairing strength constant for platinum isotopes. Pairing strength in our calculation for nuclei 160 Pt to 170 Pt do not reproduce the experimental values of binding energies but our results for these nuclei are very close to results of RMF [9]. Chosen pairing strength for these isotopes could be different.…”

“…Our results are satisfactory and in agreement with the results of Mahapatro et.al. [9]. Experimental values have been taken from the NNDC website [24].…”

“…al. [9] using RMF theory with pairing correlation from BCS approach (RMF-BCS) predicts the shape changes at 196 Pt. Different studies with different theoretical model and approaches show different results of shape transition.…”

“…al. [9] have used the relativistic mean field formalism to study even-even dripline nuclei with Z = 70 to 80. Sarriguren et.…”

A systematic study of the ground state properties of W, Os and Pt isotopes using HFB theory

“…Several authors have analysed the structural properties and shape evolution of transitional nuclei, Yb, Hf, W, Os, Pt etc using various experimental [14,15,16,17,18] as well as theoretical [19,20,21,22,23,24,25]models in recent decades. Nuclear size is one of the important characteristic properties of a nucleus.…”