2011 Fiscal Year Final Research Report
Mechanism of sonoluminescence from alkali-metal atoms
| Project/Area Number |
21560056
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Applied physics, general
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| Research Institution | Meiji University |
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Principal Investigator |
CHOI Pak-kon 明治大学, 理工学部, 教授 (30143530)
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| Co-Investigator(Kenkyū-buntansha) |
HATANAKA Shin-ichi 電気通信大学, 大学院・情報理工学研究科, 助教 (40334578)
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| Co-Investigator(Renkei-kenkyūsha) |
WATANABE Yoshiaki 同志社大学, 生命医科学部, 教授 (60148377)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 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 |
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| Research Abstract |
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.
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