Electric-field effects on H[sup [minus]] photodetachment partial cross sections above 13. 4 eV

Journal Article · Thu Jul 01 04:00:00 EDT 1993 · Physical Review A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.48.419· OSTI ID:6380988

Halka, M; Harris, P G; Mohagheghi, A H; Reeder, R A; Tang, C Y; Bryant, H C ^[1]; Donahue, J B; Quick, C R ^[2]

---

1. Department of Physics and Astronomy, The University of New Mexico, Albuquerque, New Mexico 87131 (United States)
2. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

When static electric fields ([ital F][le]90 kV/cm) were applied to the H[sup [minus]] photodetachment interaction region, new structure and lowered thresholds for production of neutral hydrogen were observed. Relative partial cross sections were measured by detection of excited states of the fragment neutral hydrogen atom H([ital N]=4, 5, or 6) resulting from laser interaction with relativistic H[sup [minus]] ions. Downward shifts in the onset of excited hydrogen production are observed to increase with field strength, and agree with a recent hyperspherical coordinate interpretation of Zhou and Lin [Phys. Rev. Lett. 69, 3294 (1992)]. Field-induced window-type resonance structure is observed both below and above the zero-field threshold (ZFT) energy. Quenching of high-lying autoionizing states was also monitored, providing evidence of field-induced tunneling by resonances lying just below the associated ZFT.

• OSTI ID: 6380988
• Journal Information: Physical Review A; (United States), Journal Name: Physical Review A; (United States) Vol. 48:1; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

664400* -- Experimentally Derived Information on Atomic & Molecular Properties-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ANIONS
AUTOIONIZATION
CHARGED PARTICLES
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELECTRIC FIELDS
ENERGY
ENERGY LEVELS
ENERGY RANGE
EXCITED STATES
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
IONIZATION
IONS
PHOTOIONIZATION
RELATIVISTIC RANGE
THRESHOLD ENERGY