On-line monitoring of cyclotron target-gas output by means of tunable lead salt diode laser absorption spectroscopy

被引：7
|
作者：
Kasyutich, V. L. [1 ]
McMahon, A. [2 ]
Barnhart, T. [2 ]
Martin, P. A. [3 ]
机构：
[1] TDL Sensors Ltd, Core Technol Facil, Manchester M13 9NT, Lancs, England
[2] Univ Manchester, Wolfson Mol Imaging Ctr, Manchester M20 3LJ, Lancs, England
[3] Univ Manchester, Sch Chem Engn & Analyt Sci, Manchester M60 1QD, Lancs, England
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2008年 / 93卷 / 2-3期
关键词：
D O I：
10.1007/s00340-008-3222-0
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate what is, to our knowledge, the first use of mid-infrared laser absorption spectroscopy for trace-gas measurements of cyclotron target outputs used for the generation of radioactive carbon-11 in positron emission tomography (PET). The spectrometer was based upon a liquid-nitrogen-cooled lead salt diode laser generating single-mode radiation in the wavenumber range of 2230-2240 cm-1. The sample flowed to a multiple-pass optical cell with a total path length of 15.23 m and the laser radiation was detected by two liquid-nitrogen-cooled InSb photodetectors. We present the results of CO, N2O and CO2 measurements on PET trace cyclotron output and discuss future work on 11sCO and 11CO(2) detection.
引用
收藏
页码：701 / 711
页数：11
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