Fragmentation of CD<sub>4</sub><sup>+</sup> induced by intense ultrashort laser pulses*

POSTER

Abstract

The fragmentation of CD4+ molecular ions is investigated by focusing intense ultrashort laser pulses‡ onto fast (keV) CD4+ ion beam targets. A coincidence three-dimensional momentum imaging technique allows us to measure the laser induced charged and neutral fragments. One of our goals is to study the competition between different CD4+ dissociation processes, specifically hydrogen elimination (CD3+ + D), deprotonation (CD3 + D+), and the hydrogen-molecule elimination (CD2+ + D2). In addition, we observe a very weak molecular hydrogen ion elimination (CD4+ → CD2 + D2+). Curiously, some branching ratios show strong wavelength dependences. We will also discuss the kinetic energy release (KER) and angular distributions of these breakup processes, as well as other two- and three-body breakup channels following the ionization of CD4+.



‡780-nm, 25-fs, about 1015-W/cm2 laser pulses at 10 kHz.

**Supported by the Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy under award number DE-FG02-86ER13491.

Presenters

  • Chandan Bagdia

    • Kansas State University

Authors

  • Chandan Bagdia

    • Kansas State University

  • Naoki Iwamoto

    • Kansas State University

  • Travis Severt

    • Kansas State University
    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS 66506 USA

  • Kevin D Carnes

    • Kansas State University

  • Itzik Ben-Itzhak

    • Kansas State University
    • J.R. Macdonald Laboratory, Physics, Kansas State University
    • J.R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS 66506 USA