Effects of electric fields on the photodetachment cross section of the H/sup -/ ion near threshold

Technical Report · Tue Dec 01 04:00:00 EST 1987

OSTI ID:5714779

Stewart, J E

The photodetachment cross section of the H/sup -/ ion near the one electron threshold in electric fields ranging from approximately 5 x 10/sup -7/ atomic units up to 2.4 x 10/sup -4/ atomic units has been studied using an 800 MeV beam at the Los Alamos National Laboratory. The lowest field data, analyzed as though at zero field, are consistent with the Wigner prediction for p wave processes. At greater field values, photodetachment using sigma polarized laser light displays the expected lowering of apparent threshold and evidence of tunneling. Using ..pi.. polarized laser light the same features are seen with the addition of oscillations superimposed on the cross section. Three complementary explanations are presented for the oscillations. 42 refs., 35 figs., 8 tabs.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5714779
• Report Number(s): LA-11152-T; ON: DE88004073
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ANIONS
BEAMS
CHARGED PARTICLES
CORRELATIONS
CROSS SECTIONS
DATA
DATA ANALYSIS
ELECTRIC FIELDS
ELECTRON DETACHMENT
ELECTRON SPECTROMETERS
ELEMENTARY PARTICLES
ENERGY
EXPERIMENTAL DATA
HYDROGEN 1 MINUS BEAMS
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
INFORMATION
ION BEAMS
IONS
LASERS
MASSLESS PARTICLES
MEASURING INSTRUMENTS
NEODYMIUM LASERS
NUMERICAL DATA
ORIENTATION
P WAVES
PARTIAL WAVES
PHOTONS
SOLID STATE LASERS
SPECTROMETERS
SPIN ORIENTATION
THRESHOLD ENERGY
TIME DEPENDENCE
TRAJECTORIES
TUNNEL EFFECT