Observation of the Nuclear Magnetic Octupole Moment of Cs133

Vladislav Gerginov, Andrei Derevianko, and Carol E. Tanner
Phys. Rev. Lett. 91, 072501 – Published 13 August 2003

Abstract

We describe our high-resolution measurements of the Cs133 6pP3/22 state hyperfine structure. An optically narrowed diode laser excites perpendicularly a highly collimated atomic beam. The spectra are calibrated with a stable reference diode laser using a rf locking scheme allowing us to determine the splittings with an accuracy of 2kHz, an order of magnitude better than previous results. The magnetic dipole a, electric quadrupole b, and magnetic octupole c hyperfine coupling constants are determined. The values we obtained are a=50.28827(23)   MHz, b=0.4934(17)   MHz, and c=0.56(7)   kHz. This work represents the first observation of the magnetic octupole moment of the cesium nucleus. We carry out atomic-structure calculations and determine the nuclear electric quadrupole moment Q=3.55(4)mb and nuclear magnetic octupole moment Ω=0.82(10)   b×μN.

  • Figure
  • Figure
  • Received 4 March 2003

DOI:https://doi.org/10.1103/PhysRevLett.91.072501

©2003 American Physical Society

Authors & Affiliations

Vladislav Gerginov1, Andrei Derevianko2, and Carol E. Tanner1

  • 1University of Notre Dame, Department of Physics, Notre Dame, Indiana 46556, USA
  • 2University of Nevada, Department of Physics, Reno, Nevada, 89557, USA

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Issue

Vol. 91, Iss. 7 — 15 August 2003

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