Premium
Radiation from the uranium collimators of the Varian 4‐MeV accelerator
Author(s) -
Nibhanupudy J. Rao,
Henschke Ulrich K.
Publication year - 1977
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.594343
Subject(s) - collimator , dosimetry , linear particle accelerator , uranium , shield , physics , radiation , optics , nuclear medicine , electromagnetic shielding , materials science , nuclear physics , beam (structure) , geology , medicine , petrology , quantum mechanics
The uranium collimator of the Varian 4‐MeV accelerator produces a dose rate of 100 mR/h near the collimator opening. It can be decreased to 4% by a 6‐mm Lucite shield at the level of the collimator opening. A better solution is a leadglass–mylar (LM) shield which decreases the uranium radiation to less than 3% and also provides better skin sparing during treatment than the open collimator.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom