TY - JOUR

T1 - Integrated Intensities of the Main Absorption Band of С2HD in the 6530–6627 cm–1 Region

AU - Plastinina, D. M.

AU - Lipskaya, A. S.

AU - Chesnokov, E. N.

N1 - This work was funded by the Russian Science Foundation, grant no. 19-73-20060.

PY - 2024/6

Y1 - 2024/6

N2 - We measured the integral intensities of the rotational lines of the C2HD molecule in the band of the first overtone (2, 0, 0, 0, 0) and the combination tone (1, 0, 1, 0, 1) in the range of P(3)–P(17) and R(0)‒R(33). For the (2, 0, 0, 0, 0) overtone, the usual distribution of intensities along the lines of the P- and R-branches is observed. For the combination tone (1, 0, 1, 0, 1), a non-standard intensity distribution is observed, which has a sharp dip at J < 6 for both the P- and R-branches. This phenomenon is explained by the drawing of intensity from the overtone (2, 0, 0, 0, 0) by the combination tone due to intramolecular Coriolis interaction. At small J, the Coriolis interaction becomes insufficient for effective mixing of states and the effect of intensity drawing disappears.

AB - We measured the integral intensities of the rotational lines of the C2HD molecule in the band of the first overtone (2, 0, 0, 0, 0) and the combination tone (1, 0, 1, 0, 1) in the range of P(3)–P(17) and R(0)‒R(33). For the (2, 0, 0, 0, 0) overtone, the usual distribution of intensities along the lines of the P- and R-branches is observed. For the combination tone (1, 0, 1, 0, 1), a non-standard intensity distribution is observed, which has a sharp dip at J < 6 for both the P- and R-branches. This phenomenon is explained by the drawing of intensity from the overtone (2, 0, 0, 0, 0) by the combination tone due to intramolecular Coriolis interaction. At small J, the Coriolis interaction becomes insufficient for effective mixing of states and the effect of intensity drawing disappears.

KW - DFB laser

KW - acetylene

KW - integrated intensities

KW - overtone spectroscopy

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85197423324&origin=inward&txGid=8bc903b08c07a97fbd2e73c8527b43d1

UR - https://www.mendeley.com/catalogue/1d15bc0c-6b98-3ea5-b68a-d5d2df0b7af8/

U2 - 10.1134/S003602442470002X

DO - 10.1134/S003602442470002X

M3 - Article

VL - 98

SP - 1102

EP - 1106

JO - Russian Journal of Physical Chemistry A

JF - Russian Journal of Physical Chemistry A

SN - 0036-0244

IS - 6

ER -