中文摘要：

基于微分的思想,结合经典的双原子分子跃迁谱线表达式,提出了预言双原子分子P线系高激发振-转跃迁谱线的新解析物理公式.对于某分子电子体系的某一P支跃迁带,利用实验上获得的一组（15条）精确的跃迁谱线和该跃迁带对应的上下振动态的转动常数（Bυ＇,Bυ″）的精确数据,该公式不仅可以精确地重复已知的实验跃迁谱线,而且还能预测出实验上难以获得的更高激发态的跃迁谱线数据.利用该公式,研究了CO分子电子基态的（2,0）振-转跃迁带的P支跃迁谱,预言了包含转动量子数J=80在内的很多未知的高激发振-转态发射谱线的正确数据.

英文摘要：

An analytical formula is derived from elementary expression of molecular total energy for calculating the accurate P-branch spectral lines of rovibrational transitions for diatomic molecules.Using the constants（Bυ＇,Bυ″） and a group of fifteen known P-branch experimental transition lines for a transition band,the formula not only reproduces the known experimental transition lines,but also generates the spectral lines that may not be available experimentally.The P-branch emission spectra of the（2,0） band of the CO molecule are studied in this work,and correct values of the unknown spectral lines up to J = 80 for this band are predicted by using the formula.