THE USE OF INTENSIFYING SCREENS FOR BETATRON RADIOSCOPY OF PRODUCTS HAVING DIFFERENT THICKNESSES

Journal Article · Sun Jan 01 04:00:00 EST 1961 · Zavodskaya Lab.

OSTI ID:4065675

Buzynov, A E

When the type of intensifying screen used in radioscopy is changed, the intensification coefficient must be known in order to be able to recalculate the exposure needed for obtaining the desired optical density on the film. The thickness variations of the materials studied are usually not taken into consideration, although the primary spectrum is changed by Compton scattering and secondary radiation. In order to determine the correlation between the intensification effect of the screens and the thickness variations of the specimens, a series of tests were made with photographic film sandwiched between CaWO/sub 4/ fluorescent screens and Pb, using a betatron with a limiting gamma energy of 22 Mev, comparing the results with data obtained with Pb screens alone. The following analytical correlation was obtained: log K = 0.975 -- 0.1235 d, where K is the dose ratio in roentgens for a given thickness needed for obtaining the same optical density with and without intensifying screens and d is the thickness of the steel specimen used. This change of intensifying action must be taken into consideration when screens and specimen density are changed. (TTT)

• Research Organization: Inst. of Physics of Metals, Academy of Sciences, USSR
• NSA Number: NSA-15-022410
• OSTI ID: 4065675
• Journal Information: Zavodskaya Lab., Journal Name: Zavodskaya Lab. Vol. Vol: 27
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

BETATRONS
CALCIUM OXIDES
COMPTON EFFECT
ENERGY LEVELS
ENGINEERING AND EQUIPMENT
FLUORESCENCE
GAMMA RADIATION
IMAGE BRIGHTNESS INTENSIFIERS
IMAGE INTENSIFIERS
IMAGES
LEAD
PHOTOGRAPHIC FILM
RADIATION DOSES
RADIOGRAPHY
SPECTRA
STEELS
TESTING
THICKNESS
TUNGSTATES
TUNGSTEN OXIDES