dorsal/arxiv
View SchemaExpressions for the number of J=0 pairs in even-even Ti isotopes
| Authors | L. Zamick, A. Escuderos, S. J. Lee, A. Z. Mekjian, E. Moya de Guerra, A. A. Raduta, P. Sarriguren |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0501069 |
| URL | https://arxiv.org/abs/nucl-th/0501069 |
| DOI | 10.1103/PhysRevC.71.034317 |
| Journal | Phys.Rev. C71 (2005) 034317 |
Abstract
We count the number of pairs in the single j-shell model of {44}Ti for various interactions. For a state of total angular momentum I, the wave function can be written in terms of the probability amplitude D(Jp Jn) that the protons couple to Jp and the neutrons to Jn. For I=0 there are three states with (I=0,T=0) and one with (I=0,T=2). The latter is the double analog of {44}Ca. In that case (T=2), the magnitude of D(JJ) is the same as that of a corresponding two-particle fractional parentage coefficient. In counting the number of pairs with an even angular momentum J, we find a new relationship obtained by diagonalizing a unitary nine-j symbol. We are also able to get results for the `no-interaction' case for T=0 states, for which it is found, e.g., that there are less (J=1,T=0) pairs than on the average. Relative to this `no-interaction case', we find for the most realistic interaction used that there is an enhancement of pairs with angular momentum J=0,2,1 and 7, and a depletion for the others. Also considered are interactions in which only the (J=0,T=1) pair state is at lower energy, only the (J=1,T=0) pair state is lowered and where both are equally lowered, as well as the QQ interaction. We are also able to obtain simplified formulae for the number of J=0 pairs for the I=0 states in {46}Ti and {48}Ti by noting that the unique state with isospin |Tz|+2 is orthogonal to all the states with isospin |Tz|.
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"abstract": "We count the number of pairs in the single j-shell model of {44}Ti for\nvarious interactions. For a state of total angular momentum I, the wave\nfunction can be written in terms of the probability amplitude D(Jp Jn) that the\nprotons couple to Jp and the neutrons to Jn. For I=0 there are three states\nwith (I=0,T=0) and one with (I=0,T=2). The latter is the double analog of\n{44}Ca. In that case (T=2), the magnitude of D(JJ) is the same as that of a\ncorresponding two-particle fractional parentage coefficient. In counting the\nnumber of pairs with an even angular momentum J, we find a new relationship\nobtained by diagonalizing a unitary nine-j symbol. We are also able to get\nresults for the `no-interaction\u0027 case for T=0 states, for which it is found,\ne.g., that there are less (J=1,T=0) pairs than on the average. Relative to this\n`no-interaction case\u0027, we find for the most realistic interaction used that\nthere is an enhancement of pairs with angular momentum J=0,2,1 and 7, and a\ndepletion for the others. Also considered are interactions in which only the\n(J=0,T=1) pair state is at lower energy, only the (J=1,T=0) pair state is\nlowered and where both are equally lowered, as well as the QQ interaction. We\nare also able to obtain simplified formulae for the number of J=0 pairs for the\nI=0 states in {46}Ti and {48}Ti by noting that the unique state with isospin\n|Tz|+2 is orthogonal to all the states with isospin |Tz|.",
"arxiv_id": "nucl-th/0501069",
"authors": [
"L. Zamick",
"A. Escuderos",
"S. J. Lee",
"A. Z. Mekjian",
"E. Moya de Guerra",
"A. A. Raduta",
"P. Sarriguren"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.71.034317",
"journal_ref": "Phys.Rev. C71 (2005) 034317",
"title": "Expressions for the number of J=0 pairs in even-even Ti isotopes",
"url": "https://arxiv.org/abs/nucl-th/0501069"
},
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