Measuring the Fr Weak Nuclear Charge by Observing a Linear Stark Shift with Small Atomic Samples

Journal Article · Fri Mar 28 00:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.123003· OSTI ID:21123783

Bouchiat, Marie-Anne ^[1]

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1. Laboratoire Kastler Brossel, Departement de Physique de l'Ecole Normale Superieure, 24 Rue Lhomond, F-75231 Paris Cedex 05 (France)

We study the chirality of ground-state alkali atoms in E and B fields, dressed with a circularly-polarized beam near-detuned (< or approx. )1 GHz) from an E-field-assisted forbidden transition such as 7S-8S in Fr. We predict parity violating energy shifts of their sublevels, linear in E and the weak nuclear charge Q{sub W}. A dressing beam of 10 kW/cm{sup 2} at 506 nm produces a shift of {approx}100 {mu}Hz at E=100 V/cm, B > or approx. 50 mG which should be observable with {approx}10{sup 4} Fr atoms confined in an optical dipole trap. We discuss optimal conditions, parameter reversals, and a calibration procedure to measure Q{sub W}.

• OSTI ID: 21123783
• Journal Information: Physical Review Letters, Vol. 100, Issue 12; Other Information: DOI: 10.1103/PhysRevLett.100.123003; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMIC NUMBER
ATOMS
CALIBRATION
CHIRALITY
DIPOLES
FORBIDDEN TRANSITIONS
FRANCIUM
GROUND STATES
MHZ RANGE 100-1000
PARITY
POLARIZED BEAMS
STARK EFFECT
TRAPS