【摘要】 本文在束-气条件下研究了Sr（¹S）,Sr（³P）+Cl₂的化学发光反应。实验压力为10^-5～10^-4Torr,金属束炉温1000K左右。同时,观测和分析了Sr,Sr^*+Cl₂反应产物Sr（A,B）、SrCl₂^*的发光光谱。发现Cl₂压力（pcl₂）较低时,主要生成SrCl^*;而pcl₂增高时(>2×10^-4Torr),SrCl₂^*的发射光谱逐渐增强。实验结果表明,SrCl^*是单次碰撞的直接产物,其发光强度(I_SrCl^*)与pcl₂、Sr的原子密度均为直线关系,而I_SrCl2^*与pCl₂成二次关系,表明SrCl₂^*是SrCl^*和Cl₂碰撞的产物,与BaCl₂^*的生成机理相同。由实验结果计算而得到的亚稳态Sr^*原子及基态Sr原子在Cl₂中的总消除截面分别为97±5（?）²及58±5（?）²。由此估计由亚稳态Sr^*及基态Sr与Cl₂反应生成SrCl（A）的相对光子产率为φ^*/φ⁰=115。更多还原

【Abstract】 The CL reactions of Sr（¹S）, Sr（³P）+Cl₂ have been studied under single collision condition on a beam-gas apparatus in the pressure of range 10^-5—10^-4 Torr.The temperature of the metal oven was about 1000K.The CL spectra of SrCl （A,B） and SrCl₂^* produced in the reactions of Sr, Sr^* +Cl₂ have been observed and analyzed. The CL spectra are always dominated by the monochloride emission while the subcontinuous emission of dichloride SrCl₂^* becomes stronger with increasing Cl₂ pressure. The experimental results show that the intensity of SrCl^* emission depends linearly upon both Cl₂ pressure and Sr number density. This means that SrCl^* is the direct product of single collisions. Whereas the quadratic dependency of SrCl₂^* intensity upon the Cl₂ pressure shows that it is produced in arreaction of SrCl+Cl₂, the same mechanism as BaCl₂^* produced in reaction of Ba + Cl₂^[4,5].The total cross section for the removal of metal atoms in ground state Sr（¹S）and excited states Sr（³p） by ₂ molecules are 58² and 97² respectively. The relative photon yield of SrCl（A） produced by Sr（¹S） and Sr（³P） reacting with Cl₂ is about Φ^*/Φ⁰=115.更多还原