dorsal/arxiv
View SchemaAbsolute frequency measurements of the $D_2$ line and fine-structure interval in $^{39}$K
| Authors | Ayan Banerjee, Vasant Natarajan |
|---|---|
| Categories | |
| ArXiv ID | physics/0401165 |
| URL | https://arxiv.org/abs/physics/0401165 |
| DOI | 10.1103/PhysRevA.70.052505 |
| Journal | Physical Review A 70, 052505 (2004) |
Abstract
We report a value for the $D_2$-line frequency of $^{39}$K with 0.25 ppb uncertainty. The frequency is measured using an evacuated ring-cavity resonator whose length is calibrated against a reference laser. The $D_2$ line presents a problem in identifying the line center because the closely-spaced energy levels of the excited state are not resolved. We use computer modelling of the measured spectrum to extract the line center and obtain a value of 391 015 578.040(75) MHz. In conjunction with our previous measurement of the $D_1$ line, we determine the fine-structure interval in the $4P$ state to be 1 729 997.132(90) MHz. The results represent significant improvement over previous values.
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"abstract": "We report a value for the $D_2$-line frequency of $^{39}$K with 0.25 ppb\nuncertainty. The frequency is measured using an evacuated ring-cavity resonator\nwhose length is calibrated against a reference laser. The $D_2$ line presents a\nproblem in identifying the line center because the closely-spaced energy levels\nof the excited state are not resolved. We use computer modelling of the\nmeasured spectrum to extract the line center and obtain a value of 391 015\n578.040(75) MHz. In conjunction with our previous measurement of the $D_1$\nline, we determine the fine-structure interval in the $4P$ state to be 1 729\n997.132(90) MHz. The results represent significant improvement over previous\nvalues.",
"arxiv_id": "physics/0401165",
"authors": [
"Ayan Banerjee",
"Vasant Natarajan"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevA.70.052505",
"journal_ref": "Physical Review A 70, 052505 (2004)",
"title": "Absolute frequency measurements of the $D_2$ line and fine-structure interval in $^{39}$K",
"url": "https://arxiv.org/abs/physics/0401165"
},
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