Performance of Multisphere Spectrometry Systems

• Published in: Radiation protection dosimetry Vol. 78; no. 4; pp. 263 - 272
• Main Authors: Sweezy, J.E., Hertel, N.E., Veinot, K.G., Karam, R.A.
• Format: Journal Article
• Language: English
• Published: Oxford Oxford University Press 01-01-1998
• Subjects: Applied radiobiology (equipment, dosimetry...); Biological and medical sciences; Biological effects of radiation; Fundamental and applied biological sciences. Psychology; Tissues, organs and organisms biophysics; Performance evaluation; Scintillator; Spectrometry; System response; Device; System design; Calibration; Thermoluminescent dosimeter; Comparative study
• ISSN: 0144-8420; 1742-3406
• DOI: 10.1093/oxfordjournals.rpd.a032359

A TLD-based multisphere spectrometer has been constructed to measure neutron spectra under high fluence-rate conditions. The multisphere system uses paired TLD-600 and TLD-700 thermoluminescence detectors. Spectral measurements made with this system are compared with measurements made with a 6LiI(Eu) scintillator-based Bonner sphere spectrometer. The system was used to measure the neutron spectrum of the Georgia Tech Research Reactor Bio-Medical Facility under high neutron fluence rates. The scintillator-based system was used at low neutron and gamma fluence rates. A comparison of this unfolded spectrum is made with an MCNP code calculation performed using a simplified representation of the reactor and the beam facility.