Observation of the (2 p , nd ) sup 1 P o double-excitation Rydberg series of helium

Journal Article · Mon Aug 24 04:00:00 EDT 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.69.1171· OSTI ID:7274202

Domke, M; Remmers, G; Kaindl, G ^[1]

---

1. Institut fuer Experimentalphysik, Freie Universitaet Berlin, Arnimallee 14, W-1000 Berlin 33 (Germany)

Double-excitation Rydberg resonances of He below the {ital N}=2 threshold of He{sup +} were studied with an energy resolution of {congruent}4 meV by photoionization using synchrotron radiation. All three Rydberg series of {sup 1}{ital P{ital o}} resonances accessible by photoabsorption, including the hitherto missing'' (2{ital p},{ital nd}){sup 1}{ital P{ital o}} series, were resolved. This settles a long-standing discrepancy between experiment and theoretical predictions and establishes a firm basis for testing the accuracy of atomic multiconfiguration calculations.

• OSTI ID: 7274202
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 69:8; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

664200* -- Spectra of Atoms & Molecules & their Interactions with Photons-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
AUTOIONIZATION
BREMSSTRAHLUNG
CATIONS
CHARGED PARTICLES
DATA
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY
ENERGY LEVELS
ENERGY RESOLUTION
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
EXPERIMENTAL DATA
FLUIDS
GASES
HELIUM
HELIUM IONS
INFORMATION
IONIZATION
IONS
NONMETALS
NUMERICAL DATA
PHOTOIONIZATION
RADIATIONS
RARE GASES
RESOLUTION
RESONANCE ABSORPTION
SORPTION
SYNCHROTRON RADIATION
THRESHOLD ENERGY