Instrument for measurement of low exposure rates

Technical Report · Fri Feb 01 04:00:00 EDT 1974

OSTI ID:4939473

Baeckstroem, A; Lindhe, J C

An instrument for measurement of exposure rates between 0.1 and 20 R/h was fabricated. The instrument will be used in connection wtth radiation therapy of gynecologic cancer. A lithium-drifted silicon detector is used. The registered pulse information is treated in the instrument so that the exposure rate may be read directly in R/h. The instrument accumulates pulses during one second, and the repetition time is one second, The error is plus or minus 10% at 0.1 R/h, plus or minus 3% at 1 R/h and less than plus or minus 1% at 10 R/h. The repetition time may be altered to 10 sec. at calibration. This means that it is possible to measure 0.01 R/h with the accuracy 10% and 0.1 R/h with the accuracy 3%. The stability with time and temperature, linearity, energy dependence, direction dependence and lifetime was investigated. (SW

• Research Organization: Statens Straalskyddsinstitut, Stockholm (Sweden)
• Sponsoring Organization: Sponsor not identified
• NSA Number: NSA-29-029446
• OSTI ID: 4939473
• Report Number(s): SSI--1974-10
• Country of Publication: Sweden
• Language: Swedish

Related Subjects

ACCURACY
CALIBRATION
DIMENSIONS
ENERGY DEPENDENCE
EXPOSURE RATEMETERS
GYNECOLOGY
LI-DRIFTED SI DETECTORS
LIFETIME
N46110* --Instrumentation--Radiation Detection Instruments-- General Detectors & Monitors
PERFORMANCE
RADIATION EFFECTS