The REMPI spectroscopy of Cl-2; A bound-free-bound route to the 1(g)(D-1(2)) ion-pair state

MN AlKahali, RJ Donovan, KP Lawley, Z Min, T Ridley

Research output: Contribution to journalArticlepeer-review

Abstract

The 1(g)(D-1(2)) ion-pair state of Cl-2 has been accessed via a two-photon, two-colour bound-free-bound route. An extensive vibrational progression is observed, overlapping high levels of the E0(g)(+) (P-3(2)) state. The absolute numbering is established from isotopic shifts and continuity with the known term values of v' = 0-6. The intermediate resonant state accessing the 1(g)(D-1(2)) state is the unbound C-1 Pi(1u). The final state classification as Ohm = 1 is confirmed by simulating the rotational band structure observed under perpendicular pump/probe polarization conditions using Honl-London factors from a coherent superposition of intermediate J(i)M(i) states, not those appropriate to well-defined J(i) and M(i) states. These Honl-London factors also reproduce the rotational linestrengths of the beta 1(g)(P-3(2)); v' = 65

Original languageEnglish
Pages (from-to)165-174
Number of pages10
JournalChemical physics
Volume208
Issue number1
Publication statusPublished - 15 Jul 1996

Keywords

  • OPTICAL DOUBLE-RESONANCE
  • ABSORPTION-SPECTRUM
  • VACUUM ULTRAVIOLET
  • CL2
  • EXCITATION
  • MOLECULES
  • CHLORINE
  • RYDBERG
  • SYSTEM

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