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题名: Improved method for measuring absolute O-2(a(1)Delta(g)) concentration by O-2(a(1)Delta(g)-> X-3 Sigma(-)(g)) IR radiation
作者: Deng, LZ;  Shi, WB;  Yang, HP;  Sha, GH;  Zhang, CH
刊名: REVIEW OF SCIENTIFIC INSTRUMENTS
发表日期: 2004-11-01
DOI: 10.1063/1.1793871
卷: 75, 期:11, 页:4455-4461
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology ;  Physical Sciences
类目[WOS]: Instruments & Instrumentation ;  Physics, Applied
研究领域[WOS]: Instruments & Instrumentation ;  Physics
英文摘要: We describe an improved technique for measuring the absolute O-2(a(1)Delta) concentration via the quantitative determination of IR radiation from O-2(a(1)Delta(g)-->X(3)Sigma(g)(-)) transition. An exact geometrical optical model was first established, in which the influence of reflection and refraction on the radiation characteristics of a luminous volume source was given full consideration, making possible the accurate calculation of the coupling efficiency between the volume source and a receiving area. Then, an IR radiation receiving apparatus (IRRRA) was constructed and its responsivity (mV/W) to the power of IR radiation calibrated by a tungsten standard lamp. An optical detection system was, in turn, built according to the optical model with fine alignment between the IRRRA and an optical cell. We then demonstrate the procedure to obtain the absolute concentration of O-2(a(1)Delta) flowing through the optical cell from a jet singlet oxygen generator from the signal of the IRRRA, the optical cell volume, and the coupling efficiency between the cell and the IRRRA. Moreover, to verify the accuracy of this method, the absolute O-2(a(1)Delta) concentration was compared to that measured by an established isothermal calorimetry method. Based on the comparison of the O-2(a(1)Delta) concentrations determined by the two methods, the Einstein A-coefficient was estimated as (2.70+/-0.84)x10(-4) s(-1), which agrees with Badger's value of 2.58x10(-4), Spalek's of 2.24x10(-4), Newman's of 2.19x10(-4), and Miller's of 2.3x10(-4) within the uncertainty of the experimental techniques. The method advanced in this article is worthwhile for the measurement of absolute O-2(a(1)Delta) concentration in a chemical oxygen iodine laser or a singlet oxygen generator. It can also provide a general technique for the measurement of absolute concentrations of long-lifetime luminous species other than O-2(a(1)Delta). (C) 2004 American Institute of Physics.
关键词[WOS]: SINGLET-OXYGEN GENERATOR ;  RAMAN-SPECTROSCOPY ;  IODINE LASERS ;  PISTON SOURCE ;  TRANSITION ;  LIFETIME
语种: 英语
WOS记录号: WOS:000224962900015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139361
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China

Recommended Citation:
Deng, LZ,Shi, WB,Yang, HP,et al. Improved method for measuring absolute O-2(a(1)Delta(g)) concentration by O-2(a(1)Delta(g)-> X-3 Sigma(-)(g)) IR radiation[J]. REVIEW OF SCIENTIFIC INSTRUMENTS,2004,75(11):4455-4461.
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