TO ENHANCE THE INTENSITY OF SONOLUMINESCENCE

• 来源期刊: 中国物理（英文版）
• 学科: 物理学
• 关键词: sonoluminescence nonlinear acoustics transient resonance of a bubble
• 年，卷（期）: 2001,（7）
• 所属期刊栏目: GLASSICAL AREAS OF PHENOMENOLOGY
• 页码范围: 636-638
• 页数: 3页
• 分类号: O4
• 语种: 英文

摘要

The transient resonance of a sonoluminescence bubble has been analysed. When the bubble performs its transient resonance at the nth order harmonics of the standing waves in the liquid, the light intensity strongly depends on the amplitude of the driving pressure(proportional to its 2n power, with n=fr/f, where fr is Minnaert's linear resonant frequency of the bubble and f is the frequency of driving sound). The kinetic energy of a vibrating bubble becomes maximum approximately when it is in its equilibrium size. For example, when the ambient temperature of a bubble decreases from 34°C to 4°C, a huge increase of the light intensity emitted by it can be explained. A suggestion was made that, within the limits permitted by the phase diagrams, as high an increase in driving pressure as possible could enhance the light intensity of sonoluminescence up to four orders of magnitude.