Measurement of Cs-buffer gas collisional frequency shift using pulsed CPT interrogation

In this paper we presented separate measurements of the temperature coefficients for clock transition in Cs for N2, Ar and Ne buffer gases. The inversion temperature for Ne has been determined (77°C). For N2 the inversion temperature is estimated at 157 158°C. We have reduced the uncertainties for linear temperature coefficients for Cs clock transition three buffer gases. The quadratic coefficients γ for N2 and Ne have been determined for the first time. For Ar buffer gas, the quadratic coefficient γ is much smaller and we have estimated its upper limit.