在高温气体效应研究中产生持续氧气稳定的原子度
Dong Zhi1, Yu Chang1, Long Huang1
1Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mianyang 621000, China.
Micromachines
|November 25, 2023
概括
研究人员开发了一种稳定的方法,使用发光放电等离子生成氧原子. 这种技术为校准激光吸收光谱提供了可靠的原子样本,这对于高温流量分析至关重要.
科学领域:
- 原子物理 原子物理
- 血科学是一门科学.
- 频谱学是一种光谱学.
背景情况:
- 调制激光吸收光谱对于分析高温环境至关重要.
- 精确的校准需要已知度的短暂原子样本,这些样本很难准备.
- 现有的方法与原子样本的稳定性和已知度作斗争.
研究的目的:
- 建立一种可靠的方法,以生成具有已知度的短暂原子样本.
- 为了利用发光放电等离子体持续生产氧原子.
- 为了使激光吸收光谱的绝对度校准.
主要方法:
- 交替电流发光放电被用来分离空气流中的氧气.
- 在777nm的直接吸收光谱测定了绝对氧原子数密度.
- 排放参数被调整为控制原子密度.
主要成果:
- 实现了氧原子的连续生成.
- 激发状态氧原子的稳定度保持在 (2.51 ± 0.02) × 10^8 cm^-3的120分钟.
- 发光放电等离子体对过渡性原子度表现出了显著的稳定性.
结论:
- 发光放电技术提供了稳定可靠的氧原子来源.
- 这些产生的原子可以作为标准化样本,用于绝对度校准.
- 这种方法克服了为光谱学准备过渡性原子样本的挑战.
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