@article{c3eb4d79a37c4d8db91627d709707022,
title = "Stark mixing spectroscopy in cesium",
abstract = "We present a new technique for selectively populating excited states which are inaccessible by dipole excitation from the ground state. The method uses a static electric field to introduce a component of a dipole-allowed state into the state of interest. We have applied the method to cesium to measure lifetimes and a Stark mixing coefficient. The results are τ(62D 5 2)=64(2) ns, τ(72D 5 2)=92.5(15) ns, and <62D 5 2|;ez |72P 3 2>/(E7P-E6D)=0.7(3)×10-3 where is in kV/cm. 141.",
author = "Peter Zimmermann and Ducas, {Theodore W.} and Littman, {Michael G.} and Daniel Kleppner",
note = "Funding Information: Atomic levels which are accessible from the ground state by electric dipole transitions have traditionally received the most exhaustive study. Recently, a number of new techniques have been introduced for studying levels which were previously inaccessible from the ground state. Among these are: 1) Optical cascade \[1\] where, for example, alkalis in high-lying P states are populated via allowed dipole transitions from an S ground state. Lower lying S and D levels are then populated by cascade from the P states; 2) Stepwise excitation \[2\] which makes use of two consecutive allowed transitions by way of an intermediate level to populate a high-lying level; 3) Two-photon excitation \[3\] which uses a second-order transition process, for instance, an S -+ D, or S -~ S transition, via absorption of two photons. The sum of the photon energies equals the energy difference between the two levels. We present here a new technique, {"}Stark mixing spectroscopy{"}, in which an applied constant electric field {"}mixes{"} a small amount of a dipole-accessible state with a nearby dipole-forbidden state \[4\].T his Work supported by United States Air Force - Office of Scientific Research (Contract F44620-72-C-0057). Visiting Associate Professor, 1972-1973. Permanent address: Institut f'0r Kernphysik, I Berlin 37, W. Germany.",
year = "1974",
month = oct,
doi = "10.1016/0030-4018(74)90390-3",
language = "English (US)",
volume = "12",
pages = "198--201",
journal = "Optics Communications",
issn = "0030-4018",
publisher = "Elsevier",
number = "2",
}