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

机译:可调谐铅盐二极管激光吸收光谱在线监测回旋加速器目标气体的输出

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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 pho-todetectors. We present the results of CO, N_2O and CO_2 measurements on PET trace cyclotron output and discuss future work on ~(11)CO and ~(11)CO_2 detection.
机译:我们证明,据我们所知,中红外激光吸收光谱法首次用于回旋加速器目标输出的痕量气体测量,该输出用于正电子发射断层扫描(PET)中放射性碳11的产生。该光谱仪基于液氮冷却的铅盐二极管激光器,该激光器产生波数范围为2230-2240 cm〜(-1)的单模辐射。样品流至总路径长度为15.23 m的多通道光学元件,并通过两个液氮冷却的InSb光电探测器检测到激光辐射。我们介绍了PET痕量回旋加速器输出的CO,N_2O和CO_2测量结果,并讨论了〜(11)CO和〜(11)CO_2检测的未来工作。

著录项

  • 来源
    《Applied physics》 |2008年第3期|p.701-711|共11页
  • 作者单位

    TDL Sensors Ltd, Core Technology Facility, 46 Grafton St.,Manchester, M13 9NT, UK;

    rnWolfson Molecular Imaging Centre, University of Manchester,27 Palatine Rd., Manchester, M20 3LJ, UK;

    rnWolfson Molecular Imaging Centre, University of Manchester,27 Palatine Rd., Manchester, M20 3LJ, UK;

    rnSchool of Chemical Engineering and Analytical Science,University of Manchester, P.O. Box 88, Manchester, M60 1QD,UK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    semiconductor lasers; laser diodes; laser spectroscopy; infrared sources; spectral absorption by atmospheric gases;

    机译:半导体激光器;激光二极管激光光谱红外光源;大气气体的光谱吸收;

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