First Optical Hyperfine Structure Measurement in an Atomic Anion

Journal Article · Fri Feb 19 00:00:00 EST 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.104.073004· OSTI ID:21386804

Fischer, A; Canali, C; Warring, U; Kellerbauer, A; Fritzsche, S ^[1]

---

1. Max Planck Institute for Nuclear Physics, Saupfercheckweg 1, 69117 Heidelberg (Germany)

We have investigated the hyperfine structure of the transition between the 5d{sup 7}6s{sup 2} {sup 4}F{sub 9/2}{sup e} ground state and the 5d{sup 6}6s{sup 2}6p {sup 6}D{sub J}{sup o} excited state in the negative osmium ion by high-resolution collinear laser spectroscopy. This transition is unique because it is the only known electric-dipole transition in atomic anions and might be amenable to laser cooling. From the observed hyperfine structure in {sup 187}Os{sup -} and {sup 189}Os{sup -} the yet unknown total angular momentum of the bound excited state was found to be J=9/2. The hyperfine structure constants of the {sup 4}F{sub 9/2}{sup e} ground state and the {sup 6}D{sub 9/2}{sup o} excited state were determined experimentally and compared to multiconfiguration Dirac-Fock calculations. Using the knowledge of the ground and excited state angular momenta, the full energy level diagram of {sup 192}Os{sup -} in an external magnetic field was calculated, revealing possible laser cooling transitions.

• OSTI ID: 21386804
• Journal Information: Physical Review Letters, Vol. 104, Issue 7; Other Information: DOI: 10.1103/PhysRevLett.104.073004; (c) 2010 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANGULAR MOMENTUM
ANIONS
COOLING
DIRAC EQUATION
E1-TRANSITIONS
EXCITED STATES
GROUND STATES
HARTREE-FOCK METHOD
HYPERFINE STRUCTURE
LASER SPECTROSCOPY
LASERS
MAGNETIC FIELDS
OSMIUM IONS
APPROXIMATIONS
CALCULATION METHODS
CHARGED PARTICLES
DIFFERENTIAL EQUATIONS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EQUATIONS
FIELD EQUATIONS
IONS
MULTIPOLE TRANSITIONS
PARTIAL DIFFERENTIAL EQUATIONS
SPECTROSCOPY
WAVE EQUATIONS