Study of zero-photon dissociation of H$_{2}^{+}$ and its isotopes in ultrashort transform limited and chirped laser pulses
POSTER
Abstract
We have measured very low kinetic energy release (KER) in the dissociation of H$_{2}^{+}$ and its isotopes in intense ultrashort 800 nm laser pulses. Zero-photon dissociation is the mechanism responsible for this low-KER peak. Our results, obtained by using coincidence three dimensional momentum imaging, suggest some differences in the low kinetic energy release part of the dissociation spectra of HD$^{+}$, namely a difference between the two channels H$^{+}$+D and H+D$^{+}$. We also investigate the effect of the positive/negative chirped pulses on the zero-photon dissociation yields. The solutions of the time-dependent Schr\"{o}dinger equation, which are in good agreement with the experiment for transform limited pulses, show qualitative differences between positively and negatively chirped pulses.
*Supported by the Chemical Sciences, Geosciences and Biosciences Division, Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy.