Applied Physics B

, Volume 78, Issue 6, pp 737–743

Frequency-mixing scheme for the production of tunable narrowband XUV radiation (91–95 nm): application to precision spectroscopy and predissociation in diatomic molecules

Authors

  • J. Philip
    • Laser Centre, Department of Physics and AstronomyVrije Universiteit
  • J.P. Sprengers
    • Laser Centre, Department of Physics and AstronomyVrije Universiteit
  • P. Cacciani
    • Laboratoire PhLAM, Université des Sciences et Technologies de Lille
  • C.A. de Lange
    • Laser Centre, Department of Physics and AstronomyVrije Universiteit
    • Laser Centre, Department of Physics and AstronomyVrije Universiteit
Article

DOI: 10.1007/s00340-004-1470-1

Cite this article as:
Philip, J., Sprengers, J., Cacciani, P. et al. Appl. Phys. B (2004) 78: 737. doi:10.1007/s00340-004-1470-1

Abstract

Tunable narrowband extreme ultraviolet radiation in the range 91–95 nm is produced by sum-frequency mixing of the outputs of a visible pulsed dye amplifier (seeded by a ring dye laser) and of a seeded second-harmonic Nd:YAG laser and subsequent frequency tripling in a gas jet of xenon. The capability of this scheme to provide tunable narrowband extreme ultraviolet radiation is demonstrated in several spectroscopic studies. The bandwidth of this system (0.01 cm-1) is deduced from a recording of absorption spectra of the 4p5(2P1/2) 6d, J=1 line in krypton. The applicability of the system for gas-phase molecular spectroscopic studies is demonstrated in recordings of the Werner bands (4,0) in H2 and (5,0) in D2 at unprecedented absolute accuracy. Line-broadening studies are performed on the b′1Σu+,v=5 valence state in N2, yielding a lifetime of 210±25 ps. A singlet–triplet perturbation, giving rise to an accidental predissociation in an excited 1Π Rydberg state in carbon monoxide at an excitation energy of 107680 cm-1, is analyzed in high resolution.

Copyright information

© Springer-Verlag 2004