Title :
Blackbody radiation shift of the 27Al+ 1S0 → 3P0 transition
Author :
Rosenband, T. ; Itano, W.M. ; Schmidt, P.O. ; Hume, D.B. ; Koelemeij, J.C.J. ; Bergquist, J.C. ; Wineland, D.J.
Author_Institution :
Nat. Inst. of Stand. & Technol., Boulder, CO, USA
Abstract :
The differential polarizability, due to near-infrared light at 1126 nm, of the 27Al+ 1S0 → 3P0 transition is measured to be Δα = 4πε0 × (1.6 ± 0.5) × 10-31 m3, where Δα = αP - αS is the difference between the excited and ground state polarizabilities. This measurement is combined with experimental oscillator strengths to extrapolate the differential static polarizability of the clock transition as Δα(0) = 4πε0×(1.5-0.5)×10-31 m3. The resulting room temperature blackbody shift of Δυ/υ = -8(3)×10-18 is the lowest known shift of all atomic transitions under consideration for optical frequency standards. A method is presented to estimate the differential static polarizability of an optical transition, from a differential light shift measurement.
Keywords :
aluminium; atom optics; atom-photon collisions; atomic clocks; blackbody radiation; excited states; frequency standards; ground states; oscillator strengths; polarisability; positive ions; 27Al+; atomic transitions; blackbody radiation shift; clock transition; differential light shift measurement; differential static polarizability; excited state polarizability; ground state polarizability; near-infrared light; optical frequency standards; optical transition; oscillator strengths; room temperature blackbody shift; temperature 293 K to 298 K; Atomic clocks; Laser beams; NIST; Oscillators; Temperature measurement; Uncertainty;
Conference_Titel :
Frequency and Time Forum (EFTF), 2006 20th European
Conference_Location :
Braunschweig
Print_ISBN :
978-1-4673-2642-1
