Li/Li/sub 2/ supersonic nozzle beam

Journal Article · Wed Mar 01 04:00:00 EST 1978 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1135412· OSTI ID:5066631

Wu, C R; Crooks, J B; Yang, S; Way, K R; Stwalley, W C

The characterization of a lithium supersonic nozzle beam has been made using spectroscopic techniques. It is found that at a stagnation pressure of 5.3 kPa (40 Torr) and a nozzle throat diameter of 0.4 mm the ground state vibrational population of Li/sub 2/ can be described by a Boltzmann distribution with T/sub v/= (195 +- 30) K. The rotational temperature is found to be T/sub r/= (70 +- 20) K by band shape analysis. Measurements by quadrupole mass spectrometer indicate that approx.10-mol. % Li/sub 2/ dimers are present far downstream for an oven body temperature of 1370 K in the supersonic nozzle expansion. This measured mole fraction is in agreement with the existing dimerization theory.

• Research Organization: Department of Chemistry, University of Iowa, Iowa City, Iowa 52242
• OSTI ID: 5066631
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 49:3; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALI METALS
ATOMIC BEAMS
BEAMS
CHEMICAL REACTIONS
DIMERIZATION
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUID FLOW
LITHIUM
MASS SPECTROSCOPY
METALS
MOLECULAR BEAMS
NOZZLES
POLYMERIZATION
ROTATIONAL STATES
SPECTROSCOPY
SUPERSONIC FLOW
VIBRATIONAL STATES