Time-dependent study of radiation trapping by time-delayed two-photon absorption

Technical Report · Sat Oct 01 00:00:00 EDT 1983

DOI:https://doi.org/10.2172/5667547· OSTI ID:5667547

Molander, W; Belsley, M; Streater, A; Burnett, K

The transport of resonance radiation through an optically thick vapor of Sr atoms is studied. A pulsed dye laser tuned to the 461 nm resonance line excites a narrow (approx. 60 ..mu..m diam) column of Sr atoms along the axis of a cylindrical oven containing Sr vapor and Ar buffer gas. After a delay of less than or equal to 80 ns, a second dye laser excites the atom from the first excited state (5s5p) to a higher excited state (5s7s). The fluorescence from this latter transition is monitored as the second laser is translated parallel to the first. Since the excited state-excited state fluorescence is not trapped the result is a plot of density of atoms in the 5s5p state as a function of position from the originally excited volume. The results are discussed qualitatively.

• Research Organization: Univ. of Colorado, Boulder, CO (United States); National Bureau of Standards, Boulder, CO (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5667547
• Report Number(s): UCRL-15564; ON: DE84002786; TRN: 83-028490
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
LASER RADIATION
ABSORPTION
STRONTIUM
RADIATION TRANSPORT
ARGON
EXCITATION
FLUORESCENCE
ALKALINE EARTH METALS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY-LEVEL TRANSITIONS
FLUIDS
GASES
LUMINESCENCE
METALS
NONMETALS
RADIATIONS
RARE GASES
640301* - Atomic
Molecular & Chemical Physics- Beams & their Reactions