Mechanism of sonoluminescence from alkali-metal atoms

碱金属原子声致发光的机制

• 批准号: 21560056
• 负责人: CHOI Pak-kon
• 金额: $ 3万
• 依托单位: Meiji University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21560056/
• 关键词: 音響キャビテーション; ソノルミネセンス; アルカリ金属原子発光; 塩化ナトリウム; 塩化カルシウム; 高速度カメラ; 気泡; アルカリ金属原子; ナトリウム発光; カリウム発光; SDS; キャビテーション; パルス幅; エキシプレックス; 音響キャビテーション; ソノルミネセンス; アルカリ金属原子発光; 塩化ナトリウム; 塩化カルシウム; 高速度カメラ; 気泡; アルカリ金属原子; ナトリウム発光; カリウム発光; SDS; キャビテーション; パルス幅; エキシプレックス

We have studied a mechanism of light emission from acoustic cavitation bubbles(sonoluminescence). Sonoluminescence from alkali-metal atoms, such as sodium and potassium, have been interested because its emission site is questioned, that is gas phase inside bubble or liquid phase at bubble/liquid interface. Sonoluminescence spectrum were investigated under the conditions of various temperatures, various dissolved gases and various ultrasonic frequencies. High-speed camera was used to study bubble dynamics which are closely related to the occurrence of sonoluminescence. The results of the present study strongly suggest the alkali-metal emission is originated from gas phase inside bubble. Furthermore, two components of Na emission, energy-shifted and broadened line and unshifted narrow line, were observed for the first time. This finding should be clarified in future and will provide a new development of sonoluminescence study.

我们研究了来自声气泡气泡（声发光）的光发射机制。来自碱金属原子（例如钠和钾）的声致发光，因为对其发射位点的质疑，即在气泡/液体界面处的气泡或液体相位的气相。在各种温度，各种溶解气体和各种超声频率的条件下研究了声发光光谱。高速摄像头用于研究与声发光的发生密切相关的气泡动力学。本研究的结果强烈表明碱金属发射起源于气泡内部气相。此外，首次观察到Na发射的两个组成部分，能量迁移和宽阔的线以及未降低的狭窄线。这一发现应在将来澄清，并将提供Sonolumumeencence研究的新开发。