dorsal/arxiv
View SchemaCalculations of parity nonconserving s-d transitions in Cs, Fr, Ba II, and Ra II
| Authors | V. A. Dzuba, V. V. Flambaum, J. S. M. Ginges |
|---|---|
| Categories | |
| ArXiv ID | physics/0101044 |
| URL | https://arxiv.org/abs/physics/0101044 |
| DOI | 10.1103/PhysRevA.63.062101 |
| Journal | Phys. Rev. A 63 (2001) 062101 |
Abstract
We have performed ab initio mixed-states and sum-over-states calculations of parity nonconserving (PNC) electric dipole (E1) transition amplitudes between s-d electron states of Cs, Fr, Ba II, and Ra II. For the lower states of these atoms we have also calculated energies, E1 transition amplitudes, and lifetimes. We have shown that PNC E1 transition amplitudes between s-d states can be calculated to high accuracy. Contrary to the Cs 6s-7s transition, in these transitions there are no strong cancelations between different terms in the sum-over-states approach. In fact, there is one dominating term which deviates from the sum by less than 20%. This term corresponds to an s-p_{1/2} weak matrix element, which can be calculated to better than 1%, and a p_{1/2}-d_{3/2} E1 transition amplitude, which can be measured. Also, the s-d amplitudes are about four times larger than the corresponding s-s transitions. We have shown that by using a hybrid mixed-states/sum-over-states approach the accuracy of the calculations of PNC s-d amplitudes could compete with that of Cs 6s-7s if p_{1/2}-d_{3/2} E1 amplitudes are measured to high accuracy.
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"abstract": "We have performed ab initio mixed-states and sum-over-states calculations of\nparity nonconserving (PNC) electric dipole (E1) transition amplitudes between\ns-d electron states of Cs, Fr, Ba II, and Ra II. For the lower states of these\natoms we have also calculated energies, E1 transition amplitudes, and\nlifetimes. We have shown that PNC E1 transition amplitudes between s-d states\ncan be calculated to high accuracy. Contrary to the Cs 6s-7s transition, in\nthese transitions there are no strong cancelations between different terms in\nthe sum-over-states approach. In fact, there is one dominating term which\ndeviates from the sum by less than 20%. This term corresponds to an s-p_{1/2}\nweak matrix element, which can be calculated to better than 1%, and a\np_{1/2}-d_{3/2} E1 transition amplitude, which can be measured. Also, the s-d\namplitudes are about four times larger than the corresponding s-s transitions.\nWe have shown that by using a hybrid mixed-states/sum-over-states approach the\naccuracy of the calculations of PNC s-d amplitudes could compete with that of\nCs 6s-7s if p_{1/2}-d_{3/2} E1 amplitudes are measured to high accuracy.",
"arxiv_id": "physics/0101044",
"authors": [
"V. A. Dzuba",
"V. V. Flambaum",
"J. S. M. Ginges"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevA.63.062101",
"journal_ref": "Phys. Rev. A 63 (2001) 062101",
"title": "Calculations of parity nonconserving s-d transitions in Cs, Fr, Ba II, and Ra II",
"url": "https://arxiv.org/abs/physics/0101044"
},
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