Local laser superheating by quenching determined by DFWM and absorption thermometry (CROSBI ID 79993)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Motzkus, M. ; Pichler, Goran ; Kompa, K.L. ; Hering, P.
engleski
Local laser superheating by quenching determined by DFWM and absorption thermometry
We used degenerate four-wave-mixing (DFWM) spectroscopy to measure the rotational distribution of transient formed NaH molecules in the Na(3p)-H2 collision system applying a recently developed new method for the correct consideration of the transition dipole moment. Considering the NaH molecule as a thermometric species, we found high rotational temperatures differing significantly from the oven temperature by up to 80%. For comparison the revealed temperatures were also determined with linear absorption measurements giving excellent agreement between the two methods. The increased temperatures are explained by a spatially localized heating mechanism which is caused by kinetic energy transfer between Na(3p) and H2. A rate equation model, which includes quenching and reaction processes, agrees satisfactorily with all types of chosen parameters, including different sodium excitations as well as different cell temperatures.
laser superheating ; quenching ; DFWM ; absorption thermometry
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
nije evidentirano
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Podaci o izdanju
257 (1-2)
1996.
181-189
objavljeno
0009-2614
1873-4448
10.1016/0009-2614(96)00517-9