Abstract
Single-bubble sonoluminescence (SBSL) spectra in H2O show featureless continuum emission. From an acoustically driven, moving bubble in phosphoric acid (H3PO4), we observe very strong molecular emission from excited OH radicals (∼310nm), which can be used as a spectroscopic thermometer by fitting the experimental SBSL spectra to the OH AΣ+2-XΠ2 rovibronic transitions. The observed emission temperature (Tem) ranges from 6200 to 9500 K as the acoustic pressure (Pa) varies from 1.9 to 3.1 bar and from 6000 to >10000K as the dissolved monatomic gas varies over the series from He to Xe.
| Original language | English (US) |
|---|---|
| Article number | 244301 |
| Journal | Physical review letters |
| Volume | 104 |
| Issue number | 24 |
| DOIs | |
| State | Published - Jun 16 2010 |
ASJC Scopus subject areas
- General Physics and Astronomy