Saturation spectroscopy of R(0), R(2) and P(2) lines in the (2-0) band of HD
Lamb-dips of R(0), R(2) and P(2) rovibrational transitions in the (2-0) overtone band of the HD molecule are measured at cryogenic temperatures using the technique of NICE-OHMS spectroscopy. Resulting transition frequencies are 214 905 335 240 ( 100 ) kHz for R(0), 219 042 856 794 ( 150 ) kHz for R(...
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| Published in: | The European physical journal. D, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2022-11, Vol.76 (11), Article 220 |
|---|---|
| Main Authors: | , , |
| Format: | Article |
| Language: | eng |
| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Lamb-dips of R(0), R(2) and P(2) rovibrational transitions in the (2-0) overtone band of the HD molecule are measured at cryogenic temperatures using the technique of NICE-OHMS spectroscopy. Resulting transition frequencies are
214
905
335
240
(
100
)
kHz for R(0),
219
042
856
794
(
150
)
kHz for R(2) and
206
898
802
150
(
150
)
kHz for P(2). Small, but systematic deviations (at 1.7
σ
level) are found from advanced ab initio calculations, supporting results from previous studies probing other lines in the (2-0) band. From a combination difference between the R(0) and P(2) lines, an accurate value for rotational-level spacing in the
v
=
0
ground state is determined, of
Δ
(
J
=
2
)
-
(
J
=
0
)
=
8
006
533
168
(
26
)
kHz, well in agreement with theory (at 0.6
σ
). Based on the observation of the dispersive line shape of R(0), the status of proposed models for the elusive line shapes of saturated transitions in HD is discussed. |
|---|---|
| ISSN: | 1434-6060 1434-6079 |