Observation of narrow resonances in the H/sup -/ photodetachment cross section near the n=3 threshold. [12. 650 and 12. 837 eV]

Journal Article · Mon Dec 03 04:00:00 EST 1979 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.43.1715· OSTI ID:5729490

Hamm, M E; Hamm, R W; Donahue, J; Gram, P A.M.; Pratt, J C; Yates, M A; Bolton, R D; Clark, D A; Bryant, H C; Frost, C A; Smith, W W

Two pronounced dips in the H/sup -/ photodetachment cross section have been observed at photon energies of 12.650 +- 0.004 and 12.837 +- 0.004 eV, just below the hydrogenic n=3 threshold. These energies were reached by crossing a UV laser beam with a relativistic H/sup -/ beam. The dips are interpreted as the first two members of a /sup 1/p Feshbach resonance series, of the ''+'' type, converging on n=3. Fano line shapes have been fitted to these structures to extract their intrinsic widths and line profile indices.

• Research Organization: Los Alamos Scientific Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 5729490
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 43:23; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ANIONS
BEAMS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELECTROMAGNETIC RADIATION
ELECTRON DETACHMENT
ENERGY RANGE
EV RANGE
EV RANGE 10-100
HIGH VACUUM
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
ION BEAMS
ION COLLISIONS
IONS
LASER RADIATION
LINE WIDTHS
PHOTON BEAMS
PHOTON COLLISIONS
PHOTON-ION COLLISIONS
RADIATIONS
RELATIVISTIC RANGE
RESONANCE
ULTRAVIOLET RADIATION