Effects of large magnetic fields on radiationless transitions of gaseous excited molecules
نویسندگان
چکیده
Under external magnetic fields (B) from 0 to 10T, we have examined the magnetic quenching of the fluorescence from several electronic excited states of gas phase molecules: S10 0 0 and 6a 1 0 vibronic bands of pyrimidine, 6V and 10V band regions of CS2, and e C(132) and (150) vibronic bands of SO2. A major result of this work is the observed saturation of the magnetic quenching due to the “direct mechanism” under large magnetic fields. This is a new feature characteristic of the magnetic quenching under large magnetic fields and cannot be interpreted by the existing theory. In order to theoretically interpret this new feature, we have solved the equation of motion for the density matrix and formulated the fluorescence quenching ratio, Q(B).
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