B. Nizamov et Pj. Dagdigian, Collisional quenching and energy transfer of the z(5)D(J)(o) states of theFe atom, J PHYS CH A, 104(27), 2000, pp. 6345-6350
Room-temperature thermal rate constants for quenching and energy transfer h
ave been determined for the individual fine-structure levels of the z(5)D(J
)(o) term of the Fe atom in collisions with lie, Ar, and several molecular
gases (N-2, O-2, H-2, and CH4). The z(5)D(J)(o) term is the upper level of
a transition at 372 nm which is convenient for laser fluorescence detection
of the Fe atom. Emission profiles from all excited levels were observed to
be exponential, and total removal rate constants were derived. The rate co
nstants for the molecular gases were significantly larger [in the range of
(3-8) x 10(-10) molecule(-1) cm(3) s(-1)] than for the inert gases [(0.3-1.
3) x 10(-10) molecule(-1) cm(3) s(-1)]. No evidence for collisional transfe
r to the neighboring b(3)H and a(3)D states was found, and upper limits for
the collisional transfer rate constants are reported. Rate constants for i
ntramultiplet transfer within the z(5)D(J)(o) state were determined for He
and O-2. The intramultiplet rate constants for He summed over all final fin
e-structure levels roughly equaled the total removal rate constants, while
they were similar to 10% of the total removal constants for O-2.