Spectre de rotation millimétrique du malononitrile

Rotational Spectra of the Isotopic Species of Chloroform: Experimental andAb InitioStructures

“…Rotational spectra observed at pressures of 20 -30 mTorr have been measured with a millimeter-wave spectrometer using superheterodyne detection for frequencies in the range 150 -300 GHz (26). The second, third, or fourth harmonics of klystrons were used to generate the required millimeter waves.…”

Radiofrequency, Centimeter-Wave, Millimeter-Wave, and Infrared Spectra of SiHF3: Investigation of the Ground, v4 = 1, and v6 = 1 Vibrational States

“…The lower part of this range, 100 -320 GHz, was recorded using the second harmonic of a 48 -54 GHz klystron ( JЉ ϭ 6) with a superheterodyne detection (19), the second, third, and fourth harmonic of a 74 -80 GHz Gunn diode ( JЉ ϭ 10-20), and a 170 -270 GHz Russian Istok backward-wave oscillator ( JЉ ϭ 12). French Thomson-CSF backward-wave oscillators were employed between 340 and 490 GHz ( JЉ ϭ 23-31).…”

Centrifugal distortion and internal rotation analysis of the rotational spectra of N-methylmethanimine d0 and d5

“…After the detection, the signal was digitally averaged and then processed by a microcomputer (ITT 2020), which calculated the line frequencies and which allowed-if necessary-digital filtering (line smoothing, baseline subtraction). For details see (6). The rotational constants are rather large and p = & = 1.53 D (I), so the lines are rather strong.…”