A STUDY OF THE REPRODUCIBILITY OF IONIZATION READINGS OBTAINED WITH LANDSVERK MODEL L-65 200-mr POCKET CHAMBERS

Technical Report · Fri Jan 01 04:00:00 EST 1960

OSTI ID:4162470

Shumway, B W; Hechter, H H; Miller, W G

A study was made of the reproducibility of ionization readings obtained with Landsverk 200-mr chambers used in conjunction with modified Model L-62 charger-readers. The errors considered were the differences between radiation trials, between two charger-readers, between chambers, and between two methods of reading. These were measured at levels of exposure of 33, 100, and 167 mr. Estimates of the errors assoclated with the degree of exposure indicated that the variance of the readings was proportional to the scale reading. It was observed that some chambers did not maintain a given calibration though others were excellent. The modified charger-readers were found to be interchangeable, and readings could be reproduced at full scale with an error of about 2 1/2 per cent. A systematic error was observed when the meter of the charger-reader was set at zero prior to introducing a chamber to be read. A method of reading in which an offset from zero was made prior to introducing a chamber resulted in nearly eliminatin- g the error. There was a variation in the readings obtained with different radiation trials. Attempts to relate this variation to any of the variables tested or with radiation trial sequence were unsuccessful. (auth)

• Research Organization: Naval Radiological Defense Lab., San Francisco
• NSA Number: NSA-14-009668
• OSTI ID: 4162470
• Report Number(s): USNRDL-TR-399
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

DOSEMETERS
ERRORS
HEALTH AND SAFETY INCLUDING DOSIMETRY
IONIZATION CHAMBERS
MEASURED VALUES
PERFORMANCE
RADIATION DOSES
RADIATIONS
STANDARDS
VARIATIONS