Photoabsorption and photoionization of HD

Journal Article · Sat Jan 01 00:00:00 EST 1983 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.446029· OSTI ID:5914025

Dehmer, Patricia M. ^[1]; Chupka, William A. ^[2]

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1. Argonne National Lab. (ANL), Argonne, IL (United States)
2. Yale Univ., New Haven, CT (United States)

Relative photoabsorption and photoionization cross sections have been measured for HD at a temperature of 78 K in the wavelength region from 735 to 805 Â. The present wavelength resolution of 0.016 Â represents an improvement of more than two orders of magnitude over that of previous photoionization studies of this molecule. Bands of the 3pπ D ¹Π_u←X ¹Σ_g⁺ system are observed to v'=17, and ionization efficiencies are reported for a number of Rydberg states of low principal quantum number. As in the case of H₂, the ionization efficiency is close to unity for Rydberg states that can autoionize with Δv= -1, but drops to zero for states that can autoionize only with a large change in vibrational quantum number and that are significantly predissociated (such as the 3pπ D ¹Π_u state). The breakdown of (g,u) symmetry in HD and the resulting effects on the absorption spectrum and on the decay paths of the Rydberg states are discussed.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE; US Department of the Navy, Office of Naval Research (ONR)
• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 5914025
• Journal Information: Journal of Chemical Physics, Vol. 79, Issue 4; ISSN 0021-9606: JCPSA6
• Publisher: American Institute of Physics (AIP)
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
HYDROGEN DEUTERIDE
ABSORPTION SPECTRA
PHOTOIONIZATION
CROSS SECTIONS
LOW TEMPERATURE
RYDBERG CORRECTION
ULTRAVIOLET RADIATION
CORRECTIONS
DEUTERIDES
DEUTERIUM COMPOUNDS
ELECTROMAGNETIC RADIATION
HYDROGEN COMPOUNDS
IONIZATION
RADIATIONS
SPECTRA
640302* - Atomic
Molecular & Chemical Physics- Atomic & Molecular Properties & Theory