New Rydberg states of gas-phase aluminum halides observed by resonance-enhanced multiphoton ionization spectroscopy

Conference · Fri Dec 31 04:00:00 EST 1993

OSTI ID:141489

Hudgens, J W; Dearden, D V; Johnson, III, R D ^[1]

---

1. National Institute of Standards and Technology, Gaithersburg, MD (United States)

The authors report detection and characterization of AlF and AlCl using 1+2, 2=1, 2+2, 3+1, and 3+2 resonance-enhanced multiphoton ionization (REMPI) spectroscopy. REMPI Spectra of AlF reveal 13 new Rydberg states that lie between 70,000 and 77,000 cm{sup {minus}1}. These new states, in combination with previously known states, form six Rydberg series. Least-squares fitting of the Rydberg series to the Rydberg equation yields the precise adiabatic ionization potential, IP{sub a}(AlF) = 9.729 {+-} 0.001 eV. Vibrational intervals of the new Rydberg states are about 25% greater than those of AlF (X {sup 1}{Sigma}{sup +}), with most lying between 930-980 cm{sup {minus}1}. REMPI spectra of AlCl reveal new Rydberg states that lie between 54000 and 60000 cm{sup {minus}1}. Vibrational intervals of these new Rydberg states are about 25% greater than those of AlCl (X {sup 1}{Sigma}{sup +}), with most lying between 570-600 cm{sup {minus}1}.

• OSTI ID: 141489
• Report Number(s): CONF-930304--
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
66 PHYSICS
ALUMINIUM CHLORIDES
ALUMINIUM FLUORIDES
LEAST SQUARE FIT
MULTI-PHOTON PROCESSES
RYDBERG STATES
SPECTRA