dorsal/arxiv
View SchemaNeutron Dripline in Odd and Even Mass Calcium and Nickel Nuclei
| Authors | Madhubrata Bhattacharya, G. Gangopadhyay |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0509050 |
| URL | https://arxiv.org/abs/nucl-th/0509050 |
| DOI | 10.1103/PhysRevC.72.044318 |
| Journal | Phys.Rev. C72 (2005) 044318 |
Abstract
Neutron rich Ca and Ni nuclei have been studied in spherical Relativistic Mean Field formalism in co-ordinate space. A delta interaction has been has been adopted to treat the pairing correlations for the neutrons. Odd nuclei have been treated in the blocking approximation. The effect of the positive energy continuum and the role of pairing in the stability of nuclei have been investigated using the resonant-BCS (rBCS) approach. In Ca isotopes, N=50 is no longer a magic number while in Ni nuclei, a new magic number emerges at N=70. There is a remarkable difference in the relative positions of the drip lines for odd and even isotopes. In Ca isotopes, the last bound even and odd nuclei are found to be $^{72}$Ca and $^{59}$Ca, respectively. In Ni isotopes, the corresponding nuclei are $^{98}$Ni and $^{97}$Ni, respectively. The origin of this difference in relative positions of the dripline in even and odd isotopes in the two chain is traced to the difference in the single particle level structures and consequent modification in the magic numbers in the two elements. Pairing interaction is seen to play a major role. The effect of the width of the resonance states on pairing has also been investigated.
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"abstract": "Neutron rich Ca and Ni nuclei have been studied in spherical Relativistic\nMean Field formalism in co-ordinate space. A delta interaction has been has\nbeen adopted to treat the pairing correlations for the neutrons. Odd nuclei\nhave been treated in the blocking approximation. The effect of the positive\nenergy continuum and the role of pairing in the stability of nuclei have been\ninvestigated using the resonant-BCS (rBCS) approach. In Ca isotopes, N=50 is no\nlonger a magic number while in Ni nuclei, a new magic number emerges at N=70.\nThere is a remarkable difference in the relative positions of the drip lines\nfor odd and even isotopes. In Ca isotopes, the last bound even and odd nuclei\nare found to be $^{72}$Ca and $^{59}$Ca, respectively. In Ni isotopes, the\ncorresponding nuclei are $^{98}$Ni and $^{97}$Ni, respectively. The origin of\nthis difference in relative positions of the dripline in even and odd isotopes\nin the two chain is traced to the difference in the single particle level\nstructures and consequent modification in the magic numbers in the two\nelements. Pairing interaction is seen to play a major role. The effect of the\nwidth of the resonance states on pairing has also been investigated.",
"arxiv_id": "nucl-th/0509050",
"authors": [
"Madhubrata Bhattacharya",
"G. Gangopadhyay"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.72.044318",
"journal_ref": "Phys.Rev. C72 (2005) 044318",
"title": "Neutron Dripline in Odd and Even Mass Calcium and Nickel Nuclei",
"url": "https://arxiv.org/abs/nucl-th/0509050"
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