Chemiionization and chemiluminescence in the reaction of SiH4 with active nitrogen
作者:O. Horie、P. Potzinger、B. Reimann
DOI:10.1016/0009-2614(86)80202-0
日期:1986.8
The reaction of SiH4 with activenitrogen in a discharge-flow system was found to produce strong chemiionization besides the well-known SiN★ and Si★ chemiluminescences. In the presence of a large initial excess of N atoms, both N and SiH4 disappeared completely in the course of the reaction. Addition of as little O2 as 1013 cm−3 was sufficient to quench the chemiluminescence and suppress chemiionization
发现SiH 4与活性氮在放电流系统中的反应除产生众所周知的SiN ★和Si ★化学发光外,还产生强的化学电离作用。在大量初始过量的N原子存在下,N和SiH 4在反应过程中完全消失。添加少至10 13 cm -3的O 2足以淬灭化学发光并完全抑制化学电离。解释实验结果的机制必须包括缓慢的引发步骤,然后是分支链。
The microwave spectrum of the SiN(<sup>2</sup>Σ<sup>+</sup>) radical
作者:Shuji Saito、Yasuki Endo、Eizi Hirota
DOI:10.1063/1.444682
日期:1983.6
The microwave absorption spectrum of the SiN radical has been detected in a dc glow discharge in a SiCl4 or SiH4/N2 mixture. The three rotational transitions N=2←1, 3←2, and 4←3, have been observed in the frequency region 87 to 175 GHz by using a source-frequency modulation microwave spectrometer. The rotational constant, the centrifugal distortion constant, the spin-rotation coupling constant, and the magnetic hyperfine coupling constants b and c and the electric quadrupole coupling constant of the nitrogen nucleus have been precisely determined. The electronic structure of the SiN molecule has been briefly discussed using the magnetic hyperfine coupling constants and also the quadrupole coupling constant [3.05(23) MHz] of 14N.
The dissociation energy of the SiN radical determined from a crossed molecular beam study of the Si+N2O→SiN+NO reaction
The (Si(PJ))-P-3 + N2O(X1SIGMA+)-->SiN(X 2SIGMA+) + NO(X 2PI(r)) reaction is studied using pulsed, crossed, supersonic molecular beams. The SiN (X 2SIGMA+) product is probed by laser-induced fluorescence. The reaction exhibits a translational energy threshold between 0.2 and 0.3 eV. The determination of the SiN population limit just above the threshold leads to a reaction endoergicity: 0.12 less-than-or-equal-to DELTAepsilon0 less-than-or-equal-to 0.38 eV, which combined with D0(N-NO) = 4.93 +/- 0.01 eV yields: 4.54 less-than-or-equal-to D0(SiN) less-than-or-equal-to 4.82 eV. This value is in agreement with a recent ab initio result from Curtiss, Raghavachari, Trucks and Pople (4.58 eV) derived from the so-called Gaussian-2 theory. The validity of the experimental approach is also discussed.
Elhanine, M.; Hanoune, B.; Guelachvili, G., Journal de Physique II
作者:Elhanine, M.、Hanoune, B.、Guelachvili, G.、Amiot, C.