Computation and analysis of the characteristic spectra of Eu(II) ions in single-bubble sonoluminescence

doi:10.1088/1674-1056/addaa1

中国物理B ›› 2025, Vol. 34 ›› Issue (9): 94301-094301.doi: 10.1088/1674-1056/addaa1

Computation and analysis of the characteristic spectra of Eu(II) ions in single-bubble sonoluminescence

Xue-Ping Wang(王学坪) and Jin-Fu Liang(梁金福)†

School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550025, China

收稿日期:2025-03-05 修回日期:2025-05-18 接受日期:2025-05-20 出版日期:2025-08-21 发布日期:2025-09-09
通讯作者: Jin-Fu Liang E-mail:jfliang@gznu.edu.cn
基金资助:
single-bubble sonoluminescence|Eu(II) characteristic spectrum|transition radiation

Computation and analysis of the characteristic spectra of Eu(II) ions in single-bubble sonoluminescence

Xue-Ping Wang(王学坪) and Jin-Fu Liang(梁金福)†

School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550025, China

Received:2025-03-05 Revised:2025-05-18 Accepted:2025-05-20 Online:2025-08-21 Published:2025-09-09
Contact: Jin-Fu Liang E-mail:jfliang@gznu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 12264008, 11864007, and 12204119) and the Basic Research Program of Guizhou Province, China (Natural Science) (Grant No. QKHJCZK[ 2024]ZD054).

摘要/Abstract

摘要： Single-bubble sonoluminescence (SBSL) occurs when a tiny bubble with an extremely small volume, isolated within a liquid, periodically compresses and expands in response to a strong ultrasonic field, emitting a brief burst of bright light. Sonoluminescence spectroscopy serves as a powerful tool for analyzing the material structure and physical state of these bubbles. Recent experimental results have demonstrated that the sonoluminescence spectra of moving single bubbles exhibit the characteristic spectra of divalent europium ions [Eu(II)] in solutions containing europium chloride (EuCl$_2$). To elucidate the radiation mechanism of the characteristic spectra of Eu(II) ions during sonoluminescence, we combined fluid mechanics, the Keller-Miksis (KM) equation, and spectral equations to calculate the spectral intensity and radiation power of SBSL in $\rm EuCl_2$ solutions, as well as the spatial distributions of temperature, pressure, particle number density, ionization energy, ionization degree and opacity within bubbles. The results indicate that the characteristic spectra of Eu(II) ions may arise from the transition radiation excited under a localized environment of high temperature, pressure, and density within bubbles. These findings could enhance our understanding of the mechanisms underlying sonoluminescence and potentially aid in the development of advanced diagnostic tools for analyzing high-energy processes in fluids.

关键词: single-bubble sonoluminescence, Eu(II) characteristic spectrum, transition radiation

Abstract: Single-bubble sonoluminescence (SBSL) occurs when a tiny bubble with an extremely small volume, isolated within a liquid, periodically compresses and expands in response to a strong ultrasonic field, emitting a brief burst of bright light. Sonoluminescence spectroscopy serves as a powerful tool for analyzing the material structure and physical state of these bubbles. Recent experimental results have demonstrated that the sonoluminescence spectra of moving single bubbles exhibit the characteristic spectra of divalent europium ions [Eu(II)] in solutions containing europium chloride (EuCl$_2$). To elucidate the radiation mechanism of the characteristic spectra of Eu(II) ions during sonoluminescence, we combined fluid mechanics, the Keller-Miksis (KM) equation, and spectral equations to calculate the spectral intensity and radiation power of SBSL in $\rm EuCl_2$ solutions, as well as the spatial distributions of temperature, pressure, particle number density, ionization energy, ionization degree and opacity within bubbles. The results indicate that the characteristic spectra of Eu(II) ions may arise from the transition radiation excited under a localized environment of high temperature, pressure, and density within bubbles. These findings could enhance our understanding of the mechanisms underlying sonoluminescence and potentially aid in the development of advanced diagnostic tools for analyzing high-energy processes in fluids.

Key words: single-bubble sonoluminescence, Eu(II) characteristic spectrum, transition radiation

中图分类号: (Ultrasonics, quantum acoustics, and physical effects of sound)

43.35.+d

78.60.Mq (Sonoluminescence, triboluminescence) 47.55.dd (Bubble dynamics)

Xue-Ping Wang(王学坪) and Jin-Fu Liang(梁金福). Computation and analysis of the characteristic spectra of Eu(II) ions in single-bubble sonoluminescence[J]. 中国物理B, 2025, 34(9): 94301-094301.

Xue-Ping Wang(王学坪) and Jin-Fu Liang(梁金福). Computation and analysis of the characteristic spectra of Eu(II) ions in single-bubble sonoluminescence[J]. Chin. Phys. B, 2025, 34(9): 94301-094301.

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Computation and analysis of the characteristic spectra of Eu(II) ions in single-bubble sonoluminescence

Computation and analysis of the characteristic spectra of Eu(II) ions in single-bubble sonoluminescence

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