Collisional energy transfer between excited-state strontium and noble-gas atoms

Journal Article · Sat Aug 01 00:00:00 EDT 1992 · Physical Review A. General Physics; (United States)

DOI:https://doi.org/10.1103/PhysRevA.46.1303· OSTI ID:7034852

Miller, D A; You, L; Cooper, J; Gallagher, A ^[1]

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1. Joint Institute for Laboratory Astrophysics, University of Colorado, Boulder, Colorado 80309-0440 (United States) National Institute of Standards Technology, Boulder, Colorado 80309-0440 (United States)

Inert-gas-induced collisional transfer between the first four excited states of Sr has been measured by determining excited-state densities following pulsed laser excitation of the 5 {sup 1}{ital P} state. We observe 5 {sup 1}{ital P} collisional transfer exclusively to the 4 {sup 3}{ital D} state, with ({similar to}800 K) rate coefficients ranging from 0.24 to 2.0{times}10{sup {minus}11} cm{sup 3} s{sup {minus}1} for the various gases. We also measure 4 {sup 1}{ital D}{sub 2} transfer primarily to the 4 {sup 3}{ital D} state, with rate coefficients of 0.65 to 6.8{times}10{sup {minus}11} cm{sup 3} s{sup {minus}1}. The 4 {sup 3}{ital D} state radiative lifetime is observed to be 2.9{plus minus}0.2 {mu}s, collisional mixing between the 4 {sup 3}{ital D}{sub {ital j}} fine-structure levels is essentially gas kinetic ({ital k}{similar to}5{times}10{sup {minus}10} cm{sup 3} s{sup {minus}1}), and {ital k}{lt}10{sup {minus}13} cm{sup 3} s{sup {minus}1} for 4 {sup 3}{ital D}{r arrow}5 {sup 3}{ital P} collisional transfer.

• OSTI ID: 7034852
• Journal Information: Physical Review A. General Physics; (United States), Journal Name: Physical Review A. General Physics; (United States) Vol. 46:3; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ALKALINE EARTH METALS
ATOM COLLISIONS
ATOM-ATOM COLLISIONS
COLLISIONS
ELEMENTS
ENERGY TRANSFER
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUIDS
GASES
KINETICS
LASERS
LIFETIME
METALS
NONMETALS
RARE GASES
STRONTIUM