Narrowing of a magnetic resonance line of Cs atoms in a thin glass cell

Abstract

We observed the free-induction decays in the ground state of Cs atoms in a thin glass cell. The line narrowing of magnetic resonance is theoretically and experimentally presented as a function of the time interval between the pump and probe pulses. The atoms moving parallel to the windows are found to have long-lived polarization and coherence. The above phenomena are characteristic of the vacuum cell in contrast to those of the buffer gas cell.