THE MESURATION OF AIR ACTIVATION PRODUCED BY BETATRON IRRADIATION

Journal Article · Thu Jan 01 04:00:00 EST 1959 · Strahlentherapie (West Germany)

OSTI ID:4235036

Harder, D; Kretschko, J; Pohlit, W

The activation of the air, as it occurs during irradiation by a betatron due to nuclear photo effects, was estimated and determined by an ionization chamber device. At a dose output of 50 rad per minute at 1.0 m target distance an activity of the air of 3 x 10/sup -11/ curies per cm/sup 3 is created due to activation of oxygen. This is 7 times the permissible maximum exposure of whole body irradiation (critical organ: skin). The incorporation of active oxygen is negligible. The activation of nitrogen after an irradiation of 10 minutes duration creates an activity of the air of 1.5 x 10/sup -12/ curies per cm/sup 3, which is 1/4 of the maximum permissible concentration. The penetration of air from the therapy room into the control room must be avoided. The radiation exposure of the patient is only about one thousandth of the tumor dose. (auth)

• Research Organization: Max-Planck-Institut fur Biophysik, Frankfurt am Main
• NSA Number: NSA-14-002637
• OSTI ID: 4235036
• Journal Information: Strahlentherapie (West Germany), Journal Name: Strahlentherapie (West Germany) Vol. Vol: 110; ISSN STRAA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACTIVATION
AIR
BETATRONS
BODY
HEALTH AND SAFETY INCLUDING DOSIMETRY
IONIZATION CHAMBERS
IRRADIATION
MAN
MEASURED VALUES
NITROGEN
OXYGEN
PHOTOELECTRIC EFFECT
QUANTITATIVE ANALYSIS
RADIATION DOSES
RADIOACTIVITY
SAFETY
SKIN
STANDARDS
TARGETS