Author:
Aiello Roberto,Santi Maria Giulia Delli,Sarno Valentina Di,Rosa Maurizio De,Ricciardi Iolanda,Natale Paolo De,Santamaria Luigi,Giusfredi Giovanni,Maddaloni Pasquale
Abstract
Abstract
We present an original opto-mechanical scheme which, effectively coupling a Lamb-dip saturated-absorption cavity ring-down spectrometer to a buffer-gas-cooling (BGC) source, allows us to determine the absolute frequency of the acetylene (ν
1 + ν
3) R(1)e transition at 6561.0941 cm−1 with an overall (statistical + systematic) uncertainty as low as 1.2 kHz. By improving the previous record with buffer-gas-cooled molecules by one order of magnitude, our achievement opens the door to new kind of ultra-precise low-temperature spectroscopic studies.
Subject
Computer Science Applications,History,Education