ACCURATE MEASUREMENT OF RELAXATION-TIMES WITH AN ACOUSTICALLY RESONANT OPTOACOUSTIC CELL

被引：9

作者：

FRANK, K

HESS, P

机构：

[1] Institut für Physikalische Chemie, Universität Heidelberg

来源：

CHEMICAL PHYSICS LETTERS | 1979年 / 68卷 / 2-3期

关键词：

D O I：

10.1016/0009-2614(79)87256-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The degrading effect of molecular relaxation processes on the quality factor Q of acoustic resonances in an optoacoustic cell is studied for pure CH4, CH4-Xe and CH4-NH3 mixtures. It is shown that accurate measurements of relaxation times can be performed by determining the shift of the acoustic resonance frequency caused by relaxation processes. © 1979.

引用

页码：540 / 543

页数：4

共 9 条

[1] VIBRATIONAL-RELAXATION TIME MEASUREMENTS IN CH4 AND CH4-RARE GAS-MIXTURES
DEVASCONCELOS, MH
DEVRIES, AE
[J]. PHYSICA A, 1977, 86 (03): : 490 - 512
[2] ACOUSTIC AMPLIFIER FOR DETECTION OF ATMOSPHERIC POLLUTANTS
DEWEY, CF
KAMM, RD
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[3] OPTIC-ACOUSTIC STUDY OF VIBRATIONAL-RELAXATION OF CH4(V2-V4) IN CH4-CH4 AND CH4-MONOATOMIC COLLISIONS
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LEPOUTRE, F
LOUIS, G
[J]. JOURNAL DE PHYSIQUE, 1977, 38 (03): : 283 - 290
[4] KLEIN R, 1975, ACUSTICA, V33, P198
[5] OPTOACOUSTIC DETECTION OF SULFUR-DIOXIDE BELOW PARTS PER BILLION LEVEL
KOCH, KP
LAHMANN, W
[J]. APPLIED PHYSICS LETTERS, 1978, 32 (05) : 289 - 291
[6] ULTRALOW GAS CONCENTRATION INFRARED ABSORPTION SPECTROSCOPY
KREUZER, LB
[J]. JOURNAL OF APPLIED PHYSICS, 1971, 42 (07) : 2934 - &
[7] Morse P. M., 1948, VIBRATION SOUND
[8] ROLE OF BUFFER GASES IN OPTOACOUSTIC SPECTROSCOPY
THOMAS, LJ
KELLY, MJ
AMER, NM
[J]. APPLIED PHYSICS LETTERS, 1978, 32 (11) : 736 - 738
[9] VIBRATIONAL DEACTIVATION IN METHANE MIXTURES
YARDLEY, JT
FERTIG, MN
MOORE, CB
[J]. JOURNAL OF CHEMICAL PHYSICS, 1970, 52 (03) : 1450 - &

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