A detailed study of the multiphoton absorption of ArF laser photons in C2N2 has been done. Evidence is presented which shows that sequential two photon absorption occurs at threshold levels as low as 1024 photons/cm2 sec. A kinetic mechanism is proposed that agrees with both the observed pressure and intensity dependence of the fluorescence induced as a result of this sequential two photon absorption.
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Jackson et al. (1979) studied this question.
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