Sub-Doppler polarization spectra of He, N2 and Ar+ recorded in discharges

Hertzler, Ch.; Foth, Hans‐Jochen

doi:10.1016/0009-2614(90)87150-p

Cited by 14 publications

(8 citation statements)

References 10 publications

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“…Between the 5 ground state levels and the 6 excited state levels there exist 32 resonances where two ground state levels are connected to a common upper state (Λ-type cross overs), and 36 resonances that couple two excited levels to a common ground state (V-type cross overs). The occurrence of cross-over resonances is well documented in saturation spectroscopy [19][20][21][22]. They give rise to sign reversals, hence Lamb peaks, depending on the V-type or Λ-type connection of hyperfine levels [23,24].…”

Section: Fig 1 Schematic Layout Of the Experimental Setup Usedmentioning

confidence: 92%

“…This rate should be much larger than the radiative lifetime of the upper HD level, being on the order of Γ ∼ 1 Hz. Hence, in this specific case of a saturated transition with a long upper state lifetime in a molecule, similar to the case of NH 3 [29], the population decay (γ pop ) cannot be induced by spontaneous radiative decay, as in the case of atoms [20,21,24].…”

Section: Fig 1 Schematic Layout Of the Experimental Setup Usedmentioning

confidence: 94%

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Lamb-dips and Lamb-peaks in the saturation spectrum of HD

et al. 2019

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The saturation spectrum of the R(1) transition in the (2-0) band in HD is found to exhibit a composite line shape, involving a Lamb-dip and a Lamb-peak. We propose an explanation for such behavior based on the effects of cross-over resonances in the hyperfine substructure, which is made quantitative in a density-matrix calculation. This resolves an outstanding discrepancy on the rovibrational R(1) transition frequency, which is now determined at 217 105 181 901 (50) kHz and in agreement with current theoretical calculations. * w.m.g.ubachs@vu.nl

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Section: Fig 1 Schematic Layout Of the Experimental Setup Usedmentioning

confidence: 92%

Section: Fig 1 Schematic Layout Of the Experimental Setup Usedmentioning

confidence: 94%

Lamb-dips and Lamb-peaks in the saturation spectrum of HD

et al. 2019

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“…Our analysis is similar to that reported in ref. [20] and will be described with the help of fig. 6.…”

Section: -Ha = --(~ § --~-)mentioning

confidence: 99%

“…787 (20) 735 (20) A (l_2) 1422 (14) 1360 (20) A(~. 3) 1627 (20) 1594 (20) A (34) 1347 (20) 1382 (20) Accurate measurements of fine structure in atomic oxygen are of interest because oxygen is relatively light and, hence, theoretically still tractable. The theory of finestructure in oxygen has been given in ref.…”

Section: -Ha = --(~ § --~-)mentioning

confidence: 99%

Polarization spectroscopy of atomic oxygen by dye and semiconductor diode lasers

Gianfrani¹,

Sasso²,

Tino³

et al. 1991

Nouv Cim D

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Summary. --We used polarization spectroscopy to perform a high-resolution investigation of atomic oxygen in the visible and near-infrared spectral region by means of dye and semiconductor diode lasers. We measured the fine structure of the highly excited 4d5D level and resolved the hyperfine structure of the metastable 3s 5S 2 level of 170. Isotope shift values are also reported for several transitions of the three stable oxygen isotopes (160, 170, 180). Polarization lineshapes are discussed and compared with those obtained in saturation techniques. PACS 35.10.Fk -Fine-and hyperfine-structure constants. PACS 32.30.Jc -Visible and ultraviolet spectra.

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“…These intensities can be obtained from the numerical solution of the optical Bloch equations by integrating signals over the entire velocity distribution within the Doppler profile, as was shown in a recent study on HD [233]. As a result, the extra lines may acquire positive or negative excess intensity and thus generate Lamb dips or Lamb peaks, respectively [251,233]. In some cases, the c-type lines may be more intense than the a-type transitions.…”

Section: 7(c)mentioning

confidence: 99%

Saturated Ultra-Precision Spectroscopy of Water and HD with NICE-OHMS

Diouf

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This research focused on conducting high-resolution spectroscopy on water and deuteride hydrogen molecules, with a particular emphasis on measuring various isotopologues. The investigation showcased the ability to achieve a significant number of measurements with exceptional precision in a short timeframe. For water isotopologues, over 500 transitions were measured with unprecedented uncertainty, highlighting the efficiency of the research approach. The use of the NICE-OHMS apparatus proved instrumental in demonstrating its sensitivity for trace gas detection. The study successfully saturated many weak lines for the first time, including the dipole allowed rovibrational lines in HD, establishing the apparatus as one of the most sensitive setups available. In the case of water, the research bridged the gap between ortho and para universes through intricate network schemes, significantly improving the accuracy of over 100 ortho levels by more than two orders of magnitude. This breakthrough offers a potential enhancement in the understanding of water molecules. In the case of deuteride hydrogen, the research achieved high detection sensitivity, enabling the measurement of rovibrational lines for the first time. Discrepancies with existing calculations were identified, indicating the need for further refinement. Moreover, the study unveiled new effects resulting from strong standing waves, adding novel insights to the understanding of molecular behavior.

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Sub-Doppler polarization spectra of He, N2 and Ar+ recorded in discharges

Cited by 14 publications

References 10 publications

Lamb-dips and Lamb-peaks in the saturation spectrum of HD

Lamb-dips and Lamb-peaks in the saturation spectrum of HD

Polarization spectroscopy of atomic oxygen by dye and semiconductor diode lasers

Saturated Ultra-Precision Spectroscopy of Water and HD with NICE-OHMS

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