title: Action spectroscopy of SrCl⁺ using an integrated ion trap time-of-flight mass spectrometer.
abstract: The photodissociation cross-section of SrCl(+) is measured in the spectral range of 36,000-46,000 cm(-1) using a modular time-of-flight mass spectrometer (TOF-MS). By irradiating a sample of trapped SrCl(+) molecular ions with a pulsed dye laser, X(1)Σ(+) state molecular ions are electronically excited to the repulsive wall of the A(1)Π state, resulting in dissociation. Using the TOF-MS, the product fragments are detected and the photodissociation cross-section is determined for a broad range of photon energies. Detailed ab initio calculations of the SrCl(+) molecular potentials and spectroscopic constants are also performed and are found to be in good agreement with experiment. The spectroscopic constants for SrCl(+) are also compared to those of another alkaline earth halogen, BaCl(+), in order to highlight structural differences between the two molecular ions. This work represents the first spectroscopy and ab initio calculations of SrCl(+).
authors.affiliation: Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
authors.forename: Prateek
authors.initials: P
authors.lastname: Puri
authors.affiliation: Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
authors.forename: Steven J
authors.initials: SJ
authors.lastname: Schowalter
authors.affiliation: Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA.
authors.forename: Svetlana
authors.initials: S
authors.lastname: Kotochigova
authors.affiliation: Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA.
authors.forename: Alexander
authors.initials: A
authors.lastname: Petrov
authors.affiliation: Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA.
authors.forename: Eric R
authors.initials: ER
authors.lastname: Hudson