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On the importance o...
On the importance of np-pairs in the isovector pairing model
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- Pan, Feng (author)
- Liaoning Normal Univ, Dept Phys, Dalian 116029, Peoples R China.;Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
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- Qi, Chong, 1983- (author)
- KTH,Kärnfysik
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- Dai, Lianrong (author)
- Liaoning Normal Univ, Dept Phys, Dalian 116029, Peoples R China.;Huzhou Univ, Sch Sci, Dept Phys, Huzhou 313000, Zhejiang, Peoples R China.
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- Sargsyan, Grigor (author)
- Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
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- Launey, Kristina D. (author)
- Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
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- Draayer, Jerry P. (author)
- Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA.
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Liaoning Normal Univ, Dept Phys, Dalian 116029, Peoples R China;Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA. Kärnfysik (creator_code:org_t)
- 2020-12-29
- 2020
- English.
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In: Europhysics letters. - : IOP Publishing. - 0295-5075 .- 1286-4854. ; 132:3
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- It is shown that the isovector np-pair number operator can be realized in the O(5) quasi-spin basis. The computation of the isovector np-pair number is demonstrated for even-even and odd-odd ds-shell nuclei described by the charge-independent mean field plus isovector pairing model restricted within the O(5) seniority-zero subspace, thereby binding energies and low-lying excited states of these ds-shell nuclei are fit, along with estimates for the isovector neutron-proton pairing contributions. For reasonable neutron-proton pairing strengths the isovector np-pairing energy contribution to the total binding energy in odd-odd N = Z nuclei is systematically larger than that in the even-even nuclei. In sum, the results suggest that the isovector np-pairing mode is favored in odd-odd N = Z nuclei; and additionally, a decrease in the double binding-energy difference for odd-odd nuclei is primarily due to the symmetry and Wigner energy contributions to the binding energy.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Keyword
- 21
- 60
- Fw
- Cs
Publication and Content Type
- ref (subject category)
- art (subject category)
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