dorsal/arxiv
View SchemaCollisional perturbation of radio-frequency E1 transitions in an atomic beam of dysprosium
| Authors | A. Cingoz, A. -T. Nguyen, D. Budker, S. K. Lamoreaux, J. R. Torgerson |
|---|---|
| Categories | |
| ArXiv ID | physics/0508148 |
| URL | https://arxiv.org/abs/physics/0508148 |
| DOI | 10.1103/PhysRevA.72.063409 |
| Journal | Phys. Rev. A 72, 063409 (2005) |
Abstract
We have studied collisional perturbations of radio-frequency (rf) electric-dipole (E1) transitions between the nearly degenerate opposite-parity levels in atomic dysprosium (Dy) in the presence of 10 to 80 $\mu$Torr of H$_\text{2}$, N$_\text{2}$, He, Ar, Ne, Kr, and Xe. Collisional broadening and shift of the resonance, as well as the attenuation of the signal amplitude are observed to be proportional to the foreign-gas density with the exception of H$_2$ and Ne, for which no shifts were observed. Corresponding rates and cross sections are presented. In addition, rates and cross sections for O$_2$ are extracted from measurements using air as foreign gas. The primary motivation for this study is the need for accurate determination of the shift rates, which are needed in a laboratory search for the temporal variation of the fine-structure constant [A. T. Nguyen, D. Budker, S. K. Lamoreaux, and J. R. Torgerson, Phys. Rev. A \textbf{69}, 22105 (2004)].
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"abstract": "We have studied collisional perturbations of radio-frequency (rf)\nelectric-dipole (E1) transitions between the nearly degenerate opposite-parity\nlevels in atomic dysprosium (Dy) in the presence of 10 to 80 $\\mu$Torr of\nH$_\\text{2}$, N$_\\text{2}$, He, Ar, Ne, Kr, and Xe. Collisional broadening and\nshift of the resonance, as well as the attenuation of the signal amplitude are\nobserved to be proportional to the foreign-gas density with the exception of\nH$_2$ and Ne, for which no shifts were observed. Corresponding rates and cross\nsections are presented. In addition, rates and cross sections for O$_2$ are\nextracted from measurements using air as foreign gas. The primary motivation\nfor this study is the need for accurate determination of the shift rates, which\nare needed in a laboratory search for the temporal variation of the\nfine-structure constant [A. T. Nguyen, D. Budker, S. K. Lamoreaux, and J. R.\nTorgerson, Phys. Rev. A \\textbf{69}, 22105 (2004)].",
"arxiv_id": "physics/0508148",
"authors": [
"A. Cingoz",
"A. -T. Nguyen",
"D. Budker",
"S. K. Lamoreaux",
"J. R. Torgerson"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevA.72.063409",
"journal_ref": "Phys. Rev. A 72, 063409 (2005)",
"title": "Collisional perturbation of radio-frequency E1 transitions in an atomic beam of dysprosium",
"url": "https://arxiv.org/abs/physics/0508148"
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