Analysis of nonresonant effects in the two-photon spectroscopy of helium

Результат исследований: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

In the present paper, we study nonresonant corrections for experimental measurements of the transition frequencies in the helium atom. Having attracted more attention, such effects can make a significant contribution to experiments based on one- and two-photon atomic spectroscopy. The quantum interference effects in the measurements of n 3 S 1 - 33 D 1 (n = 3, 4, 5) transition frequencies based on Doppler-free two-photon spectroscopy, are considered as a possible source of current discrepancy between the experimental and theoretical data. We demonstrate that line profile asymmetry caused by the quantum interference of fine sub-levels of the 3DJ (J=1,2,3) state can reach tenths of a megahertz for different experimental conditions. Thus, previously unaccounted nonresonant corrections should be taken in next-generation experimental measurements of transitions frequencies in helium. However, they could not completely eliminate the current imbalance in the study of helium spectra and the question is still open.

Язык оригиналаанглийский
Номер статьи165002
Число страниц5
ЖурналJournal of Physics B: Atomic, Molecular and Optical Physics
Том54
Номер выпуска16
DOI
СостояниеОпубликовано - 18 авг 2021

Предметные области Scopus

  • Физика конденсатов
  • Атомная и молекулярная физика и оптика

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