L X-ray spectrometry in vivo with a Si(Li)-NaI(Tl) detector

A novel Si(Li)-NaI(Tl) spectrometer was developed for measurements of UL X-rays from /sup 239/Pu in the lungs of exposed persons. The spectrometer consists of six large, cooled Si(Li) detectors mounted on edge to provide two windows, one facing the lungs and the other a NaI(Tl) scintillator for anti...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 1990-04, Vol.37 (2), p.859-867
Main Authors: Strauss, M.G., Keane, A.T., Reinke, S.A., Pehl, R.H.
Format: Article
Language:English
Subjects:
Biological system modeling
Energy resolution
Geometry
Humans
In vivo
Lungs
Niobium
Spectroscopy
X-ray detection
X-ray detectors
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Summary:A novel Si(Li)-NaI(Tl) spectrometer was developed for measurements of UL X-rays from /sup 239/Pu in the lungs of exposed persons. The spectrometer consists of six large, cooled Si(Li) detectors mounted on edge to provide two windows, one facing the lungs and the other a NaI(Tl) scintillator for anticoincidence background suppression. The sensitive area of the array is 54.5 cm/sup 2/ and the FWHM (full width at half maximum) resolution at 17 keV is 390 eV. The ambient background count rate per minute in the energy band of interest of the detector is 0.13. This is
ISSN:0018-9499
1558-1578
DOI:10.1109/23.106727