Absolute frequency measurements of the $D_2$ line and fine-structure interval in $^{39}$K
| dc.creator | Banerjee, Ayan | |
| dc.creator | Natarajan, Vasant | |
| dc.date | 2004-01-30 | |
| dc.date.accessioned | 2026-07-07T06:21:32Z | |
| dc.date.available | 2026-07-07T06:21:32Z | |
| dc.description | 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. | |
| dc.description | 4 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/physics/0401165 | |
| dc.identifier | http://arxiv.org/abs/physics/0401165 | |
| dc.identifier | Physical Review A 70, 052505 (2004) | |
| dc.identifier | doi:10.1103/PhysRevA.70.052505 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/95630 | |
| dc.subject | Atomic Physics | |
| dc.title | Absolute frequency measurements of the $D_2$ line and fine-structure interval in $^{39}$K | |
| dc.type | text |