Resonance-enhanced multiphoton ionization spectroscopy of NO

摘要

The resonance-enhanced multiphoton ionization (REMPI) spectrum of NO has been obtained in the range of 420-480nm with a Nd.YAG pumped optical parametric generator and amplifier. The spectral lines can be attributed to NO X~2Π(v″= 0,1)→A~Σ(v′=0,1) and X~2Π(v″=0)→E~2Σ(v′= 0～4) transitions. In this wavelength range, NO molecules are ionized via the resonant intermediate states A~2Σ~+ or E~2Σ and by (2+2) or (3+1) REMPI process. The dependence of ion signals on laser intensity is in good agreement with these results.