Stability against {alpha} decay of some recently observed superheavy elements

Journal Article · Tue Feb 15 00:00:00 EST 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.027601· OSTI ID:21499455

Roy Chowdhury, Partha; Gangopadhyay, G; Bhattacharyya, Abhijit ^[1]

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1. Department of Physics, University of Calcutta, 92 A.P.C. Road, Calcutta 700 009 (India)

The probability of {alpha}-particle emission for some recently observed superheavy nuclei (SHN) are investigated. The {alpha}-decay half-lives of SHN are calculated in a quantum tunneling model with density-dependent M3Y (DDM3Y) effective nuclear interaction using theoretical and measured Q{sub {alpha}} values. We determine the density distribution of {alpha} and daughter nuclei from the relativistic mean-field (RMF) theory using FSUGold force, NL3, and TM1 parameter sets. The double-folded nuclear potential is numerically calculated in a more microscopic manner using these density distributions. The estimated values of {alpha}-decay half-lives are in good agreement with the recent data. We compare our results with recently detected {alpha}-decay chains from a new element with atomic number Z=117 reported by the Joint Institute for Nuclear Research, Dubna. Finally, we determine the half-lives of superheavy elements with Z=108-120 and neutron number N=152-190 to explore the long-standing predictions of the existence of an 'island of stability' due to possible spherical proton (Z{approx}114) and neutron (N{approx}184) shell closures.

• OSTI ID: 21499455
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 2; Other Information: DOI: 10.1103/PhysRevC.83.027601; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
ATOMIC NUMBER
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
EMISSION
FORECASTING
HALF-LIFE
HEAVY NUCLEI
INTERACTIONS
JINR
MEAN-FIELD THEORY
NEUTRONS
NUCLEAR POTENTIAL
PROTONS
Q-VALUE
RELATIVISTIC RANGE
STABILITY
TRANSACTINIDE ELEMENTS
TUNNEL EFFECT
BARYONS
DECAY
ELEMENTARY PARTICLES
ELEMENTS
ENERGY
ENERGY RANGE
EVALUATION
FERMIONS
HADRONS
INTERNATIONAL ORGANIZATIONS
NUCLEAR DECAY
NUCLEI
NUCLEONS
POTENTIALS
SIMULATION
TRANSPLUTONIUM ELEMENTS
TRANSURANIUM ELEMENTS