Superdeformed and hyperdeformed states in Z=122 isotopes

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S. K. Patra,¹ M. Bhuyan,^1,2 M. S. Mehta,^3,4 and Raj K. Gupta³
¹Institute of Physics, Sachivalaya Marg, Bhubaneswar 751 005, India
²School of Physics, Sambalpur University, Jyotivihar, Burla 768 019, India
³Department of Physics, Panjab University, Chandigarh 160 014, India
⁴Department of Applied Sciences, RBCEBTW, Mohali 140 104, India

Received 29 April 2009; published 18 September 2009

Wecalculate the binding energy, root-mean-square radius, and quadrupole deformation parameterfor the recent, possibly discovered superheavy element Z=122, using theaxially deformed relativistic mean-field (RMF) and nonrelativistic Skyrme Hartree-Fock (SHF)formalisms. The calculation is extended to include various isotopes ofZ=122 element, starting from A=282 to A=320. We predict highlydeformed structures in the ground state for all the isotopes.A shape transition appears at about A=290 from a highlyoblate to a large prolate shape, which may be consideredas the superdeformed and hyperdeformed structures of the Z=122 nucleusin the mean-field approaches. The most stable isotope (largest bindingenergy per nucleon) is found to be ³⁰²122, instead ofthe experimentally observed ²⁹²122.

URL:	http://link.aps.org/doi/10.1103/PhysRevC.80.034312
DOI:	10.1103/PhysRevC.80.034312
PACS:	21.10.Dr; 21.60.Jz; 23.60.+e; 27.90.+b 21.10.Dr Nuclear binding energies and masses 21.60.Jz Nuclear density functional theory and extensions 23.60.+e α decay 27.90.+b Properties of nuclei with A ≥ 220 YEAR: 2009

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