title: Heterodyne frequency measurements of (14)NH(3) and (15)NH(3) nu(2)-band transitions.
abstract: The infrared frequencies of 26 transitions in the nu(2) bands of (14)NH(3) and (15)NH(3) have been measured by a combination of saturation spectroscopy and heterodyne techniques. The measurements are accurate to 0.5 MHz ( 10(-5) cm(-1)) and provide secondary calibration standards in the 9-13-microm region. Newly developed cw NH(3) lasers are used to perform the majority of the measurements.
authors.forename: K J
authors.initials: KJ
authors.lastname: Siemsen
authors.forename: J
authors.initials: J
authors.lastname: Reid