Study of kinetic energy release in laser multiphoton ionization fragmentation by linear reflectron

Journal Article · Thu Sep 11 00:00:00 EDT 1986 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100410a003· OSTI ID:5278675

Tai, T L; El-Sayed, M A

The current signals of the parent and the different daughter ions formed by laser multiphoton ionization fragmentation techniques are studied as a function of the delay between the laser pulse and the pulsed accelerating voltage of a reflectron time-of-flight mass spectrometer. The decay of most of the current signals is found to be exponential and is described in terms of ion escape from the collection volume of the mass spectrometer. From the square of the observed decay constants, the relative kinetic energies of the ions can be determined. Since the parent ion is formed thermally, the kinetic energies of the daughter ions relative to that of the parent ion are converted into absolute kinetic energies of the daughter ions. Both the small values of the observed average kinetic energy release and the small spread observed in these values for most of the fragment ions formed from 1,4-dichlorobenzene are discussed in terms of the statistical theory of dissociation as well as the nature of the UV mulitphoton ionization dissociation process.

• Research Organization: Univ. of California, Los Angeles
• OSTI ID: 5278675
• Journal Information: J. Phys. Chem.; (United States), Vol. 90:19
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BENZENE
PHOTOIONIZATION
ORGANIC CHLORINE COMPOUNDS
KINETIC ENERGY
EXPERIMENTAL DATA
MASS SPECTROSCOPY
MULTI-PHOTON PROCESSES
NEODYMIUM LASERS
TIME-OF-FLIGHT SPECTROMETERS
AROMATICS
DATA
ENERGY
HYDROCARBONS
INFORMATION
IONIZATION
LASERS
MEASURING INSTRUMENTS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
SOLID STATE LASERS
SPECTROMETERS
SPECTROSCOPY
400500* - Photochemistry