Excitation of the 4.3-μm bands of CO2 by low-energy electrons
Excitation of the 4.3-μm bands of CO2 by low-energy electrons
复制标题
低能电子激发 CO2 的 4.3 μm 谱带
DOI：
10.1103/physreva.14.615
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发表时间：
1976
影响因子：
2.9
通讯作者：
A. Phelps
中科院分区：
文献类型：
--
作者：
B. Bulos;A. Phelps
使用CO/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/ sub 2/密度（1.5至7）x 10/sup 17/cm/cm/sup 3/）选择最大程度地达到探测器的辐射。 Mu..m辐射。大约10/sup -8/w的4.3 - .. mu..m辐射由大约10/sup -7/-a电子电流入射在INSB光伏检测器上。测量含有少量的CO/sub 2/的N/SUB 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2/sub 2的振动系数的兴奋系数。 4.3 - .. mu..m辐射每厘米的电子漂移产生，每co/sub 2/sub 2/sub 2/sub 2/sup -17/cm/cm/sup -2/at e/n = 6 x 10/sup -17/n = 6 x 10/sup -17/ v cm/sup 2/至5.4 x 10/sup -16/cm/cm/sup -2/at e/n = 4 x 10/sup -16/v cm/sup 2/。总的气体密度对于CO/ SUB 2/，获得了更多»振动刺激截面，这与兴奋系数数据以及大多数已发布的电子束数据一致
Rate coefficients for the excitation of the 4.3-..mu..m bands of CO/sub 2/ by low-energy electrons in CO/sub 2/ have been measured using a drift-tube technique. The CO/sub 2/ density ((1.5 to 7) x 10/sup 17/ molecules/cm/sup 3/) was chosen to maximize the radiation reaching the detector. Line-by-line transmission calculations were used to take into account the absorption of 4.3-..mu..m radiation. A small fraction of the approximately 10/sup -8/ W of the 4.3-..mu..m radiation produced by the approximately 10/sup -7/-A electron current was incident on an InSb photovoltaic detector. The detector calibration and absorption calculations were checked by measuring the readily calculated excitation coefficients for vibrational excitation of N/sub 2/ containing a small concentration of CO/sub 2/. For pure CO/sub 2/ the number of molecules capable of emitting 4.3-..mu..m radiation produced per cm of electron drift and per CO/sub 2/ molecule varied from 10/sup -17/ cm/sup -2/ at E/N = 6 x 10/sup -17/ V cm/sup 2/ to 5.4 x 10/sup -16/ cm/sup -2/ at E/N = 4 x 10/sup -16/ V cm/sup 2/. Here E is the electric field and N is total gas density. The excitation coefficients at lower E/N are much larger than estimated previously. A set ofmore » vibrational excitation cross sections is obtained for CO/sub 2/ which is consistent with the excitation coefficient data and with most of the published electron-beam data. (AIP)« less