非表示:
キーワード:
Broadband rotational spectroscopy; Double resonance; Chirped pulse; Rapid-adiabatic passage
要旨:
We report here pronounced, stepwise multi-resonance excitations in benzonitrile arising from a single 1 μs broadband 2–8.3 GHz microwave chirp, observed with our new chirped-pulse broadband rotational spectrometer, COMPACT. Such multi-resonance excitations significantly alter the relative intensity patterns and are a strong indication that, for the given experimental conditions and using benzonitrile as a polar test molecule (μA = 4.5152 D), the rapid adiabatic passage (RAP) regime for strong coupling must be applied. This finding is contrary to previous discussions of chirped-pulse rotational spectroscopy, where the linear fast passage regime of weak coupling has been assumed.
