科研之友
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摘要
Single-bubble sonoluminescence (SBSL) spectra in H(2)O show featureless continuum emission. From an acoustically driven, moving bubble in phosphoric acid (H(3)PO(4)), we observe very strong molecular emission from excited OH radicals (similar to 310 nm), which can be used as a spectroscopic thermometer by fitting the experimental SBSL spectra to the OH A(2)Sigma(+)-X(2)Pi rovibronic transitions. The observed emission temperature (T(em)) ranges from 6200 to 9500 K as the acoustic pressure (P(a)) varies from 1.9 to 3.1 bar and from 6000 to >10 000 K as the dissolved monatomic gas varies over the series from He to Xe.
- 出版日期2010-6-16
