Formation of protonated ammonia clusters probed by a femtosecond laser

Journal Article · Thu Dec 02 04:00:00 EST 1993 · Journal of Physical Chemistry; (United States)

DOI:https://doi.org/10.1021/j100150a014· OSTI ID:7235473

Purnell, J; Wei, S; Buzza, S A; Castleman, Jr, A W ^[1]

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1. Pennsylvania State Univ., University Park, PA (United States)

Femtosecond pump-probe techniques combined with a reflection time-of-flight mass spectrometer are employed to investigate the formation mechanisms of protonated ammonia clusters. Pump pulses are employed to excite the ammonia clusters to electronically excited states corresponding to selected A or C' states, while probe pulses with variable delay times are used to ionize the clusters. The results reveal that both the absorption-ionization-dissociation and absorption-dissociation-ionization mechanisms occur in the A state, while the absorption-ionization-dissociation mechanism is the sole one operative in the C' state. 23 refs., 7 figs.

• DOE Contract Number: FG02-88ER60648
• OSTI ID: 7235473
• Journal Information: Journal of Physical Chemistry; (United States), Journal Name: Journal of Physical Chemistry; (United States) Vol. 97:48; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400201* -- Chemical & Physicochemical Properties
400500 -- Photochemistry
AMMONIA
CHARGED PARTICLES
DISSOCIATION
ENERGY LEVELS
EXCITED STATES
HYDRIDES
HYDROGEN COMPOUNDS
IONIZATION
IONS
LASERS
MASS SPECTROSCOPY
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
SPECTROSCOPY