title: Intense, narrow atomic-clock resonances.
abstract: We present experimental and theoretical results showing that magnetic resonance transitions from the "end" sublevels of maximum or minimum spin in alkali-metal vapors are a promising alternative to the conventional 0-0 transition for small-size gas-cell atomic clocks. For these "end resonances," collisional spin-exchange broadening, which often dominates the linewidth of the 0-0 resonance, decreases with increasing spin polarization and vanishes for 100% polarization. The end resonances also have much stronger signals than the 0-0 resonance, and are readily detectable in cells with high buffer-gas pressure.
authors.affiliation: Department of Physics, Princeton University, Princeton, New Jersey 08544, USA.
authors.forename: Y-Y
authors.initials: YY
authors.lastname: Jau
authors.forename: A B
authors.initials: AB
authors.lastname: Post
authors.forename: N N
authors.initials: NN
authors.lastname: Kuzma
authors.forename: A M
authors.initials: AM
authors.lastname: Braun
authors.forename: M V
authors.initials: MV
authors.lastname: Romalis
authors.forename: W
authors.initials: W
authors.lastname: Happer