Ionization in Rydberg-atom--SF/sub 6/ collisions at high n
Absolute rate constants for ionization of Rb(ns,nd) atoms in collisions with SF/sub 6/ have been measured for values of n in the range 38--106. In addition, the kinematics of such reactions have been investigated using Xe(nf) atoms. The data confirm that collisions of Rydberg atoms with targets that attach free low-energy electrons are well described by the ''essentially-free''-electron model. Analysis of the data shows that the cross section sigma(v) for electron attachment to SF/sub 6/ at very low electron energies (< or approx. =10 meV) is inversely proportional to the electron velocity v and, if v is expressed in cm sec/sup -1/, is given by sigma(v) = (4.2 +- 1.0) x 10/sup -7//v cm/sup 2/.
- Research Organization:
- Department of Space Physics and Astronomy and the Rice Quantum Institute, Rice University, Houston, Texas 77251
- OSTI ID:
- 5009087
- Journal Information:
- Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 32:6; ISSN PLRAA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ATOM COLLISIONS
ATOM-MOLECULE COLLISIONS
BOUND STATE
COLLISIONS
CROSS SECTIONS
ELECTRON ATTACHMENT
ELECTRON TRANSFER
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
IRRADIATION
KINETICS
METALS
MOLECULE COLLISIONS
PULSED IRRADIATION
RUBIDIUM
RYDBERG STATES
SULFUR COMPOUNDS
SULFUR FLUORIDES