摘要
利用铝电极放电产生的Al原子与O2 反应生成AlO自由基 ,在超声射流冷却下在 430— 480nm波长范围观测到AlO自由基B—X跃迁的激光诱导荧光激发谱 .光谱振动结构分析表明所有的谱带属于V′ -V″ =1,2 ,3跃迁 ,并获得基态和激发态的振动频率与非谐性常数 .另外还对其中 (1,4)谱带的转动结构进行标识 ,并得到相应的转动常数和离心畸变系数 .对从基态振动能级V″ =5向上跃迁的谱带强度增强进行了讨论 .
Laser\|induced fluorescence excitation spectrum of B 2Σ +—X 2Σ + transition of gas\|phase AlO radical cooled in a supersonic jet has been observed in the range of 430—480?nm.AlO was produced by reacting O\-2 with Al atoms from a dc discharge\|sputtering source.The observed vibrational bands were identified as V′-V″=1,2,3 transitions respectively.The vibrational frequencies and anharmonic constants were obtained for both the ground state X 2Σ + and the excited state B 2Σ +.Furthermore a rotational analysis of the (1,4) band was made.The abnormal intensity of the V″=5 transitions is discussed.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第9期1689-1691,共3页
Acta Physica Sinica
基金
国家自然科学基金!(批准号 :2 98730 4 5)
中国科学院院长基金
中国科学院"九五"基础研究青年基金资助的课题&&
