HD⁺ ions cooled to 18 mK yield most precise vibrational-rotational spectra to date
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HD⁺ ions cooled to 18 mK yield most precise vibrational-rotational spectra to date

A research team from the Innovation Academy for Precision Measurement Science and Technology (APM) of the Chinese Academy of Sciences has made significant progress in precisely measuring the vibrational-rotational spectra of hydrogen molecular ions (HD⁺).