Low temperature measurements of the rotational relaxation in D/sub 2/ free jets

Journal Article · Sat Jun 15 04:00:00 EDT 1985 · J. Chem. Phys.; (United States)

OSTI ID:5548544

Kern, K; David, R; Comsa, G

The rotational relaxation of molecular deuterium in a free jet expansion has been studied between 78 and 473 K by pseudorandom time-of-flight technique. In the temperature range 78--308 K a decrease of the rotational collision number Z/sub rot/ with increasing temperature is observed as predicted theoretically by Raff and by Rabitz and Lam. Also reported are room temperature data of Z/sub rot/ for H/sub 2/ and HD expansions. The number of collisions required to relax H/sub 2/, D/sub 2/, and HD at room temperature is in the ratio 10:5:1.

• Research Organization: Institut fuer Grenzflaechenforschung und Vakuumphysik, Kernforschungsanlage Juelich GmbH, Postfach 1913, D 5170 Juelich West Germany
• OSTI ID: 5548544
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 82:12; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAMS
DEUTERIUM
ENERGY LEVELS
EXCITED STATES
HIGH TEMPERATURE
HYDROGEN ISOTOPES
ISOTOPES
JETS
LIGHT NUCLEI
LOW TEMPERATURE
MEDIUM TEMPERATURE
MOLECULAR BEAMS
NUCLEI
ODD-ODD NUCLEI
RELAXATION
ROTATIONAL STATES
STABLE ISOTOPES