Heterodyne frequency measurements of (14)NH(3) and (15)NH(3) nu(2)-band transitions.
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.
Siemsen
K J
KJ
Reid
J
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