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Title: Mass predictions of atomic nuclei in the infinite nuclear matter model

Abstract

We present here the mass excesses, binding energies, one- and two-neutron, one- and two-proton and {alpha}-particle separation energies of 6727 nuclei in the ranges 4{<=}Z{<=}120 and 8{<=}A{<=}303 calculated in the infinite nuclear matter model. Compared to our predictions of 1999 mass table, the present ones are obtained using larger data base of 2003 mass table of Wapstra and Audi and resorting to higher accuracy in the solutions of the {eta}-differential equations of the INM model. The local energy {eta}'s supposed to carry signature of the characteristic properties of nuclei are found to possess the predictive capability. In fact {eta}-systematics reveal new magic numbers in the drip-line regions giving rise to new islands of stability supported by relativistic mean field theoretic calculations. This is a manifestation of a new phenomenon where shell-effect overcomes the instability due to repulsive components of the nucleon-nucleon force broadening the stability peninsula. The two-neutron separation energy-systematics derived from the present mass predictions reveal a general new feature for the existence of islands of inversion in the exotic neutron-rich regions of nuclear landscape, apart from supporting the presently known islands around {sup 31}Na and {sup 62}Ti. The five global parameters representing the properties of infinite nuclear matter,more » the surface, the Coulomb and the pairing terms are retained as per our 1999 mass table. The root-mean-square deviation of the present mass-fit to 2198 known masses is 342 keV, while the mean deviation is 1.3 keV, reminiscent of no left-over systematic effects. This is a substantive improvement over our 1999 mass table having rms deviation of 401 keV and mean deviation of 9 keV for 1884 data nuclei.« less

Authors:
 [1];  [2]
  1. Department of Physics, Berhampur University, Berhampur-760 007 (India)
  2. Institute of Physics, Bhubaneswar-751 005 (India)
Publication Date:
OSTI Identifier:
22192315
Resource Type:
Journal Article
Journal Name:
Atomic Data and Nuclear Data Tables
Additional Journal Information:
Journal Volume: 98; Journal Issue: 4; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0092-640X
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; COMPARATIVE EVALUATIONS; DIFFERENTIAL EQUATIONS; KEV RANGE; MAGIC NUCLEI; MATHEMATICAL SOLUTIONS; MEAN-FIELD THEORY; NEUTRON SEPARATION ENERGY; NEUTRONS; NUCLEAR MATTER; NUCLEAR STRUCTURE; NUCLEON-NUCLEON INTERACTIONS; PROTONS; RELATIVISTIC RANGE; SHELL MODELS; SODIUM 31; TITANIUM 62

Citation Formats

Nayak, R.C., E-mail: rcnayak00@yahoo.com, and Satpathy, L., E-mail: satpathy@iopb.res.in. Mass predictions of atomic nuclei in the infinite nuclear matter model. United States: N. p., 2012. Web. doi:10.1016/J.ADT.2011.12.003.
Nayak, R.C., E-mail: rcnayak00@yahoo.com, & Satpathy, L., E-mail: satpathy@iopb.res.in. Mass predictions of atomic nuclei in the infinite nuclear matter model. United States. https://doi.org/10.1016/J.ADT.2011.12.003
Nayak, R.C., E-mail: rcnayak00@yahoo.com, and Satpathy, L., E-mail: satpathy@iopb.res.in. 2012. "Mass predictions of atomic nuclei in the infinite nuclear matter model". United States. https://doi.org/10.1016/J.ADT.2011.12.003.
@article{osti_22192315,
title = {Mass predictions of atomic nuclei in the infinite nuclear matter model},
author = {Nayak, R.C., E-mail: rcnayak00@yahoo.com and Satpathy, L., E-mail: satpathy@iopb.res.in},
abstractNote = {We present here the mass excesses, binding energies, one- and two-neutron, one- and two-proton and {alpha}-particle separation energies of 6727 nuclei in the ranges 4{<=}Z{<=}120 and 8{<=}A{<=}303 calculated in the infinite nuclear matter model. Compared to our predictions of 1999 mass table, the present ones are obtained using larger data base of 2003 mass table of Wapstra and Audi and resorting to higher accuracy in the solutions of the {eta}-differential equations of the INM model. The local energy {eta}'s supposed to carry signature of the characteristic properties of nuclei are found to possess the predictive capability. In fact {eta}-systematics reveal new magic numbers in the drip-line regions giving rise to new islands of stability supported by relativistic mean field theoretic calculations. This is a manifestation of a new phenomenon where shell-effect overcomes the instability due to repulsive components of the nucleon-nucleon force broadening the stability peninsula. The two-neutron separation energy-systematics derived from the present mass predictions reveal a general new feature for the existence of islands of inversion in the exotic neutron-rich regions of nuclear landscape, apart from supporting the presently known islands around {sup 31}Na and {sup 62}Ti. The five global parameters representing the properties of infinite nuclear matter, the surface, the Coulomb and the pairing terms are retained as per our 1999 mass table. The root-mean-square deviation of the present mass-fit to 2198 known masses is 342 keV, while the mean deviation is 1.3 keV, reminiscent of no left-over systematic effects. This is a substantive improvement over our 1999 mass table having rms deviation of 401 keV and mean deviation of 9 keV for 1884 data nuclei.},
doi = {10.1016/J.ADT.2011.12.003},
url = {https://www.osti.gov/biblio/22192315}, journal = {Atomic Data and Nuclear Data Tables},
issn = {0092-640X},
number = 4,
volume = 98,
place = {United States},
year = {2012},
month = {7}
}