Photon echoes in plasmas: collisional relaxation in helium on 2/sup 3/S/sub 1/-3/sup 3/P/sub 012/

Journal Article · Wed Nov 01 04:00:00 EST 1978 · Opt. Lett.; (United States)

DOI:https://doi.org/10.1364/OL.3.000170· OSTI ID:6537163

Baer, T; Abella, I D

Photon echoes are observed for the first time in plasmas on atomic metastable states populated by rf discharge in helium at pressures from 0.01 to 0.5 Torr. The echoes are generated by tunable dye-laser excitation. The collision cross section for echo dephasing on the He 2/sub 3/S-3/sup 3/P transition at 3888 A by collisions with ground-state atoms is 5 x 10 /sup -1/4 cm/sup 2/ +- 20%. Echoes are also observed on the 3P metastable manifold in neon.

• Research Organization: Ryerson Physical Laboratory, Department of Physics, The University of Chicago, Illinois 60637
• OSTI ID: 6537163
• Journal Information: Opt. Lett.; (United States), Journal Name: Opt. Lett.; (United States) Vol. 3:5; ISSN OPLED
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
CRYOGENIC FLUIDS
DYE LASERS
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUIDS
HELIUM
LASERS
MEDIUM VACUUM
METASTABLE STATES
NONMETALS
P STATES
PLASMA
PRESSURE DEPENDENCE
RARE GASES
RELAXATION
S STATES