Mass-selected Ion-molecule Cluster Beam Apparatus for Ultrafast Photofragmentation Studies

POSTER

Abstract

We describe an apparatus to study the fragmentation of iodide-molecule clusters triggered by laser excitation and transfer of an electron from the iodide to the neutral molecule. The instrument captures both charged and neutral fragments. The apparatus comprises a source to generate the ion-molecule clusters, a time-of-flight (TOF) spectrometer and a mass filter to select the desired anions, and a detection chamber where the laser excites the clusters and the fragment anions and neutrals are captured. The apparatus performance is tested by measuring the photofragments: I-, CF3I- and neutrals from photoexcitation of ion-molecule cluster CF3I·I- using 266 nm UV laser.The experimental results are compared with recent experiments and calculations, with particular attention to the dynamics of the photoexcitation.

*This work is supported by a DOE-EPSCOR grant number DE-SC0019482.

Publication: A manuscript based on this work has been summited to the journal: Review of Scientific Instruments.

Presenters

  • Xiaojun Wang

    • University of Nebraska - Lincoln

Authors

  • Xiaojun Wang

    • University of Nebraska - Lincoln

  • Mahmudul Hasan

    • University of Nebraska - Lincoln

  • Yibo Wang

    • University of Nebraska - Lincoln

  • Lin Fan

    • University of Nebraska - Lincoln

  • Daniel S Slaughter

    • Lawrence Berkeley National Laboratory
    • Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA

  • Martin Centurion

    • University of Nebraska - Lincoln
    • Department of Physics and Astronomy, University of Nebraska–Lincoln, Lincoln, NE, USA