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195753 citationsJournal Article

Authors

Theodore H. Maiman · Stanford University

Abstract

The fine structure of helium levels $(1s3p)^{3}P_{J}$, $J=1, 2$ is determined by the microwave-optical method outlined in the preceding paper. Helium atoms are excited to $3^{3}P_{J}$ by electron bombardment and the optical radiation $3^{3}P_{J}\ensuremath{\rightarrow}2^{3}S_{1}(3889 \mathrm{A})$ is observed with a photomultiplier tube. The intensity of this radiation changes when radio waves induce transitions between the fine structure sublevels. The separation $3^{3}P_{1}\ensuremath{-}3^{3}P_{2}$ is found to be 658.0\ifmmode\pm\else\textpm\fi{}1.0 Mc/sec, which is to be compared to the most recent optical estimates of 750\ifmmode\pm\else\textpm\fi{}300 Mc/sec.

Topics & Keywords

Atomic and Molecular Physics Advanced Chemical Physics Studies Quantum, superfluid, helium dynamics

Publication Details

Published in: Physical Review

Volume 105, Issue 2, pp. 573-579

DOI: 10.1103/physrev.105.573

Field-Weighted Citation Impact: 2.30

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