NH2 Radical Sources in Condensed Phases

The NH2 production in condensed phases will be discussed in Section 2.1.7.5.3. 

Rotational transitions in the wavelength range around 316 pm have been used to detect NH2 in a supersonic jet ( 5K) with a very high sensitivity ([NH2] 2 x 10 mol/cm ) using a tunable, far-infrared laser device [35]. 

The Zeeman effect was applied to detect NH2 by using transitions between the Zeeman components of a single rotational state (electron spin resonance (ESR)) [36 to 39] and transitions between Zeeman components of two rotational states (laser magnetic resonance 

NH2 detection with coherent anti-Stokes-Raman scattering (CARS) was reported in [48]. The author found spectroscopic and kinetic evidence for an NH2 CARS spectrum in the wavelength range 3195 to 3225 cm during laser photolysis of NH3 [48]. 

NH2 was mass-spectrometrically detected by electron impact ionization [49 to 52] and photoionization [53]. In photoelectron spectroscopy experiments in the vacuum UV (He la radiation), the NH2 (X Bi, Ai, B ) NH2(X Bi) transitions were observed [54] (see p. 197), on which the photoionization mass spectrometry in the wavelength range 75 to 112.5 nm [53] is based. 

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