Blackbody radiation shift in the {sup 87}Rb frequency standard

Journal Article · Sun Aug 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.022510· OSTI ID:21448493

Safronova, M S; Dansha, Jiang; Safronova, U I ^[1]

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1. Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA, and Joint Quantum Institute, University of Maryland Department of Physics and National Institute of Standards and Technology, College Park, Maryland 20742 (United States)

The operation of atomic clocks is generally carried out at room temperature, whereas the definition of the second refers to the clock transition in an atom at absolute zero. This implies that the clock transition frequency should be corrected in practice for the effect of finite temperature, of which the leading contributor is the blackbody radiation (BBR) shift. Experimental measurements of the BBR shifts are difficult. In this work, we have calculated the blackbody radiation shift of the ground-state hyperfine microwave transition in {sup 87}Rb using the relativistic all-order method and carried out a detailed evaluation of the accuracy of our final value. Particular care is taken to accurately account for the contributions from highly excited states. Our predicted value for the Stark coefficient, k{sub S}=-1.240(4)x10{sup -10} Hz/(V/m){sup 2}, is three times more accurate than the previous calculation [E. J. Angstman, V. A. Dzuba, and V. V. Flambaum, Phys. Rev. A 74, 023405 (2006)].

• OSTI ID: 21448493
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ACCURACY
ATOMIC CLOCKS
ATOMS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BLACKBODY RADIATION
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
ENERGY RANGE
EVALUATION
EXCITED STATES
INTERMEDIATE MASS NUCLEI
ISOTOPES
MICROWAVE RADIATION
NUCLEI
ODD-EVEN NUCLEI
OPERATION
RADIATIONS
RADIOISOTOPES
RELATIVISTIC RANGE
RUBIDIUM 87
RUBIDIUM ISOTOPES
STANDARDS
STARK EFFECT
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
YEARS LIVING RADIOISOTOPES