Infrared spectroscopy of hydrogen-doped liquid helium

dc.contributor.advisorBrooks, R.L.
dc.contributor.authorTrottier, Alexandre of Physicsen_US of Guelphen_US of Scienceen_US
dc.description.abstractSamples of liquid helium and hydrogen-doped liquid helium were irradiated using a 3 MeV proton beam. The mid-infrared spectra of the samples were recorded between 0.3 and 1.8 $\mu m$. In the hydrogen-doped liquid helium spectra we observe several rotational lines from different vibrational bands of the $e\sp3\Sigma\sbsp{u}{+}\longrightarrow a\sp3\Sigma\sbsp{g}{+}$ hydrogen electronic transition. The hydrogen features are blue-shifted by ${\sim}10\ cm\sp{-1}$ and broadened to a width of ${\sim}30\ cm\sp{-1}$. Atomic helium features are similarly shifted and broadened. This effect is not caused by instrumental resolution. Three calculations based on the theory of excited states in liquid helium and semi-classical broadening theory are presented. The resulting line profiles of the first and second calculations are found to be in good agreement with the experimental observations. The third calculation is almost parameter free and reproduces the lineshift and linewidth within a factor of 2.en_US
dc.publisherUniversity of Guelphen_US
dc.rights.licenseAll items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectliquid heliumen_US
dc.subjecthydrogen-doped liquid heliumen_US
dc.subject3 MeV proton beamen_US
dc.subjectinfrared spectroscopyen_US
dc.titleInfrared spectroscopy of hydrogen-doped liquid heliumen_US


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