Acta Phys. -Chim. Sin. ›› 1985, Vol. 1 ›› Issue (01): 66-75.doi: 10.3866/PKU.WHXB19850109

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Sha Guohe; Zhong Xian; Zhao Shen; Zhang Cunhao   

  1. Dalian Institute of Chemical Physics; Academia Sinica
  • Received:1984-06-17 Revised:1984-10-12 Published:1985-02-15

Abstract: Optical-optical double resonance multiphoton ionization(OODR-MPI)spectroscopy is a rapidly developing, versatile technique which should find wide applications in both molecular spectroscopy and molecular dynamics.
In an OODR-MPI study of CO, we irradiate the static sample cell by 2 pulsed dye laser beams. The first UV laser light (“pump beam”) resonantly pumps ground state CO to A~1∏ state via a 2-photon process. Then a second visible laser light (“probe beam”) excites CO A~1∏ to B~1∑~+. The excited B~1∑~. The excited B~1∑~+ molecule further undergoes ionization by absorbing one more UV photon, so the whole process follows a 2+1+1 photon scheme.