Observation of Resonance Effect in Modulated Fluorescent Light from Coherently Excited $4 {}^{2}S_{\frac{1}{2}}$ and $4 {}^{2}P_{\frac{1}{2}}$ Levels in ${}^{4}{He}^{+}$

21 April 1969

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 22 (16) , 815-816
https://doi.org/10.1103/physrevlett.22.815

Abstract

We have observed a resonance phenomenon in the fluorescent light from

{}^{4}{He}^{+}

at a frequency corresponding to the interval between the nondegenerate Zeeman components

β

and

f

of the

4 {}^{2}S_{\frac{1}{2}}

and

4 {}^{2}P_{\frac{1}{2}}

states excited by an electron beam modulated at the corresponding frequency (uhf microwave). The observations can be interpreted as "quantum beats." An observation which we recently described in this way is better considered as a time-dependent level-crossing effect.

Keywords

This publication has 5 references indexed in Scilit:

Stark-Mixing Signals in the $n = 4$ term of Singly Ionized Helium
Physical Review Letters, 1969
Observation of Lamb Shifts by Quantum Beats
Physical Review Letters, 1968
Measurement of the Lamb Shift in the $n = 4$ Level of ${He}^{+}$ : RF Spectroscopy Using Time-Resolved Optical Detection
Physical Review B, 1967
Fine Structure of $n = 4$ Levels of ${({He}^{4})}^{+}$
Physical Review Letters, 1966
Proposal for Measuring Lamb Shifts by the Study of Modulated, Fluorescent Light
Physical Review B, 1964

Observation of Resonance Effect in Modulated Fluorescent Light from Coherently Excited4S122and4P122Levels inHe+4

Abstract

Keywords

Observation of Resonance Effect in Modulated Fluorescent Light from Coherently Excited $4 {}^{2}S_{\frac{1}{2}}$ and $4 {}^{2}P_{\frac{1}{2}}$ Levels in ${}^{4}{He}^{+}$