Ultraviolet-infrared double-resonance laser spectroscopy of nd (n = 12--17) Rydberg states in /sup 3/He

Journal Article · Tue Feb 01 04:00:00 EST 1983 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.27.850· OSTI ID:6301535

Bloomfield, L A; Gerhardt, H; Haensch, T W

The hyperfine structure of the singlet and triplet nd Rydberg states (n = 12--17) in /sup 3/He have been studied by Doppler-free ultraviolet-infrared double-resonance laser spectroscopy. Using the frequency-doubled output of a cw dye ring laser we have populated the 1s5p /sup 3/P state of /sup 3/He by excitation from the metastable 1s2s /sup 3/S state at 294.5 nm. In a second step, an infrared single-mode cw color center laser is used to excite d Rydberg states. The experimental results for the n /sup 1,3/D hyperfine splittings (n = 12--17) are in excellent agreement with semiempirical calculations using hydrogenlike wave functions. Anomalous isotopic shifts in the electrostatic energy intervals of 5 to 20 MHz were found for the states n = 12--17. These shifts are smaller than the shifts of about 35 MHz found for the states n = 5--8 with the help of anticrossing spectroscopy. No satisfactory explanation of these shifts has yet been found.

• Research Organization: Department of Physics, Stanford University, Stanford, California 94305
• OSTI ID: 6301535
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 27:2; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
DOUBLE RESONANCE METHODS
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY LEVELS
EXCITED STATES
FLUIDS
GASES
HELIUM
HYPERFINE STRUCTURE
INFRARED RADIATION
ISOTOPE EFFECTS
LASERS
METASTABLE STATES
NONMETALS
OPTICAL PUMPING
PUMPING
RADIATIONS
RARE GASES
RING LASERS
RYDBERG STATES
SPECTRAL SHIFT
ULTRAVIOLET RADIATION