Dynamics of cluster dissociation following multiphoton ionization

Technical Report · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6710236

Castleman, A W

A major advance in the study of unimolecular dissociation and the spectroscopy of clusters has become available through the use of multiphoton ionization coupled with a reflectron introduced into the drift region of a time-of-flight mass spectrometer. Using single and two-color tunable pulsed lasers, the excess energy introduced into a cluster can be well controlled. The power of this method is demonstrated by the results of recent investigations of hydrogen-bonded clusters which, following ionization, lead to an internal ion-molecule reaction, and cluster fragmentation. The role of dissociation and the influence of the thermochemical stability of cluster ions in effecting the appearance of magic numbers in certain cluster distributions is discussed. The application of this method in determining ionization potentials of probe molecules following successive clustering with a solvent species is also presented.

• Research Organization: Pennsylvania State Univ., University Park (USA). Davey Lab.
• OSTI ID: 6710236
• Report Number(s): AD-A-175692/3/XAB
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
CHARGED PARTICLES
DISSOCIATION
DISTRIBUTION
DYNAMICS
ELEMENTARY PARTICLES
ELEMENTS
FRAGMENTATION
HYDROGEN
IONIZATION
IONS
MASS SPECTROMETERS
MASSLESS PARTICLES
MEASURING INSTRUMENTS
MECHANICS
MOLECULES
MULTI-PHOTON PROCESSES
NONMETALS
PHOTOIONIZATION
PHOTONS
SOLVENTS
SPECTROMETERS
SPECTROSCOPY
STABILITY