In chapter 1 , the history investigation of gap : n with dilute nitrogen concentration , especially its isoelectronic exciton mechanics and the study background of gapn alloys are briefly introduced 早在二十世纪六十年代， thomas等人就发现在gap : n中，存在一系列尖锐谱线。
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2 the experimental principle and method of beam - foil spectroscopy are presented , and the application of the isoelectronic sequence in the analyses of spectra is described , cowan program for the theoretical calculations is introduced 2介绍了束箔光谱学的实验原理和方法，说明了等电子序列及其在谱线识别中的应用，介绍了用于理论计算的cowan程序。
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The isoelectronic system of gap : n has been investigated extensively in the dilute limit since 1965 . thomas et al identified that a series of sharp emission lines in gap : n were due to the recombinations of excitons bound to either isolated nitrogen centers or various nitrogen pair centers 这些谱线来自于等电子杂质n形成的束缚激子态(孤立n中心和nn _ i对)辐射复合产生的零声子线及其声子伴线。
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4 the spectrum of highly ionized cu and ge was investigated by means of the beam - foil technique . by comparison with other experimental data we determined 42 energy levels of cu and 13 energy levels of ge . for the spectrum without experimental data for comparison , they are determined by isoelectronic sequence 摘要4我们采用束箔光谱方法测量高离化态cu和ge束的光谱线，与文献中的实验数据相对照，确定了42条cu的谱线和13条ge的谱线，对于无实验值可对照的谱线，利用理论值和实验值进行等电子序列证明。
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