Abbas Khadjavi, Allen Lurio, et al.
Physical Review
Paper
Isotope shift in the 2S01-2P11 line of helium
Abstract
The isotope shift in the 2S01-2P11 (2.06) line of helium has been measured for the first time and found to be 4200 140 MHz. This measurement is a sensitive test of the mass-polarization contribution to the isotope shift and is found to be in excellent agreement with the calculations of Pekeris. © 1969 The American Physical Society.
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