Journal
APPLIED PHYSICS B-LASERS AND OPTICS
Volume 97, Issue 2, Pages 523-528Publisher
SPRINGER
DOI: 10.1007/s00340-009-3720-8
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Funding
- JSPS [20245005]
- Grants-in-Aid for Scientific Research [20245005] Funding Source: KAKEN
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Buffer-gas pressure broadening for the P(1), Q(1), R(0) and R(1) transitions in the 2 nu (3) band of CH4 was investigated in the 1660 nm region. The pressure broadening coefficients, gamma(gas), were determined for a variety of buffer gases: N-2, O-2, He, Ne, Ar, Kr and Xe. The gamma values generally increased with increasing polarizability of the buffer gases. gamma(air) are 0.056(2) for P(1), 0.056(1) for R(0), 0.061(1) for R(1) and 0.059(1) for Q(1) in units of cm(-1) atm(-1) where numbers in parentheses are one standard deviation in units of the last digits quoted. The temperature dependent parameter (broadening exponent) for air is 0.84(7) for P(1) within the temperature range 233-298 K.
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