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Research PapersNo Access

PROPERTIES OF Z = 120 NUCLEI AND THE α-DECAY CHAINS OF THE ^{292, 304}120 ISOTOPES USING RELATIVISTIC AND NONRELATIVISTIC FORMALISMS

Department of Physics, Aligarh Muslim University, Aligarh-202002, India

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School of Physics, Sambalpur University, Jyotivihar, Burla-768019, India

Corresponding author.

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Institute of Physics, Sachivalaya Marg, Bhubaneswar-751005, India

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https://doi.org/10.1142/S0218301312500929Cited by:14 (Source: Crossref)

Abstract

The ground state and first intrinsic excited state of superheavy nuclei with Z = 120 and N = 160–204 are investigated using both nonrelativistic Skyrme–Hartree–Fock (SHF) and the axially deformed relativistic mean field (RMF) formalisms. We employ a simple BCS pairing approach for calculating the energy contribution from pairing interaction. The results for isotopic chain of binding energy (BE), quadrupole deformation parameter, two neutron separation energies and some other observables are compared with the finite range droplet model (FRDM) and some recent macroscopic–microscopic calculations. We predict superdeformed ground state solutions for almost all the isotopes. Considering the possibility of magic neutron number, two different modes of α-decay chains ²⁹²120 and ³⁰⁴120 are also studied within these frameworks. The Q_α-values and the half-life for these two different modes of decay chains are compared with FRDM and recent macroscopic–microscopic calculations. The calculation is extended for the α-decay chains of ²⁹²120 and ³⁰⁴120 from their excited state configuration to respective configuration, which predicts long half-life (in seconds).

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PACS: 21.10.Dr, 21.10.Ft, 21.10.Gv, 21.10.Tg

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Vol. 21, No. 11

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Received 8 August 2012

Revised 11 September 2012

Accepted 1 October 2012

Published: 25 October 2012

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