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

Journal Article · Thu Dec 01 04:00:00 EST 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.38.5628· OSTI ID:6642664

Stewart, J E; Bryant, H C; Harris, P G; Mohagheghi, A H; Donahue, J B; Quick, C R; Reeder, R A; Yuan, V; Hummer, C R; Smith, W W; others, and

A study is presented of 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/ up to 2.4 x 10/sup -4/ a.u. The lowest-field data, nominally at zero field, are consistent with the Wigner threshold law for p-wave processes. At larger field values, photodetachment using sigmapolarized laser light displays the expected lowering of apparent threshold and evidence of tunneling. Using ..pi..-polarized light, the same features are seen with the additional feature of oscillations superimposed on the cross section. Three complementary explanations are presented for the oscillations.

• Research Organization: The University of New Mexico, Albuquerque, New Mexico 87131
• OSTI ID: 6642664
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 38:11; ISSN PLRAA
• 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
COLLISIONS
CROSS SECTIONS
ELECTRIC FIELDS
ELECTRON DETACHMENT
ENERGY
ENERGY DEPENDENCE
ENERGY RANGE
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
ION COLLISIONS
IONS
LASERS
NEODYMIUM LASERS
OSCILLATIONS
PHOTON COLLISIONS
PHOTON-ION COLLISIONS
POLARIZED BEAMS
RELATIVISTIC RANGE
SOLID STATE LASERS
THRESHOLD ENERGY