In this paper we calculate the effect of spin-exchange collisions in alkali-metal vapors. In the framework of the high-energy approximation, we evaluate the spin-exchange cross sections related to the line broadening and to the frequency shift of the ground state hyperfine transition. We do the calculation for the four isotopes, 23Na, 39K, 87Rb, and 133Cs. The results are used in particular to evaluate the spin-exchange frequency shift in Rb vapor cell frequency standards used in many applications. It turns out that, due to possible fluctuations in the atomic density, spin exchange may affect significantly the medium and long term frequency stability of the frequency standard.
Spin-exchange frequency shift in alkali-metal-vapor cell frequency standards / Micalizio, Salvatore; Aldo, Godone; Levi, Filippo; AND JACQUES, Vanier. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 73:(2006), pp. 033414(1)-033414(5). [10.1103/PhysRevA.73.033414]
Spin-exchange frequency shift in alkali-metal-vapor cell frequency standards
MICALIZIO, SALVATORE;LEVI, FILIPPO;
2006
Abstract
In this paper we calculate the effect of spin-exchange collisions in alkali-metal vapors. In the framework of the high-energy approximation, we evaluate the spin-exchange cross sections related to the line broadening and to the frequency shift of the ground state hyperfine transition. We do the calculation for the four isotopes, 23Na, 39K, 87Rb, and 133Cs. The results are used in particular to evaluate the spin-exchange frequency shift in Rb vapor cell frequency standards used in many applications. It turns out that, due to possible fluctuations in the atomic density, spin exchange may affect significantly the medium and long term frequency stability of the frequency standard.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
