Photoabsorption and photoionization of HeH{sup +}

Journal Article · Sat Mar 01 04:00:00 EST 2003 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.67.033409· OSTI ID:20633865

Saenz, Alejandro ^[1]

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1. Fachbereich Chemie, Universitaet Konstanz, Fach M 721, D-78 457 Constance (Germany)

The photoabsorption spectrum of the HeH{sup +} molecular ion is investigated. The theoretical study includes transitions to electronically excited states and to the ionization continuum. The influence of autoionizing resonances is discussed. In the absorption spectrum, vibrational motion is considered within the Born-Oppenheimer approximation, whereas the reflection approximation is applied for the photoionization spectrum. The importance of the photoabsorption spectrum for the ongoing tritium neutrino-mass experiments is discussed. In order to assess the accuracy of the numerical approach, the doubly excited states of HeH{sup +} (position and width) and the photoionization spectrum of H{sub 2} are compared to literature data.

• OSTI ID: 20633865
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 67; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION SPECTRA
ACCURACY
BORN-OPPENHEIMER APPROXIMATION
CATIONS
EXCITED STATES
HELIUM COMPOUNDS
HYDROGEN
LINE WIDTHS
MOLECULAR IONS
NEUTRINOS
PHOTOIONIZATION
PHOTON-MOLECULE COLLISIONS
REFLECTION
RESONANCE
REST MASS
TRITIUM