Resonant photoacoustic cell for low temp
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M.P.P.M Jorge; J Mendes Filho; A.C Oliveira; A.J.P Braga; C.L Cesar; S.P Morato;
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Article
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1999
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Elsevier Science
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English
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This paper describes a resonant photoacoustic cell for low temperature measurements. It has the shape of the Helmholtz resonator, with the microphone separated from the sample by a resonant tube. In this way the microphone is kept at room temperature while the sample temperature is lowered. When the