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Attenuation measurements have been made for pressed wood, steel and lead in the neutron beam generated by 35 MeV deuterons on a thick Be target, using narrow-beam, semibroad-beam and broad-beam geometries. In addition, the measurements were extended to the neutron beams from 25 and 15 MeV D+ on Be, for semibroad-beam geometry only. A tissue-equivalent plastic ionization chamber was used as the detector; hence the measured parameter approximated the total (n + gamma) dose in tissue. After correcting for radiation scattering around the absorbers, the remaining curves were nearly exponential in most cases, and a build-up factor could be employed to describe the varying degree of scattered radiation dose as a function of absorber thickness and geometry. The results given should be applicable in designing primary-beam shields and collimators, as well as providing a useful basis for extending calculations to other geometries through Monte Carlo techniques.
F H Attix, and
R B Theus, and
G E Miller
January 1985,
Radiobiologia, radiotherapia,
F H Attix, and
R B Theus, and
G E Miller
March 2005,
Medical physics,
F H Attix, and
R B Theus, and
G E Miller
August 1976,
AJR. American journal of roentgenology,
F H Attix, and
R B Theus, and
G E Miller
April 1967,
The American journal of roentgenology, radium therapy, and nuclear medicine,
F H Attix, and
R B Theus, and
G E Miller
January 1965,
The American journal of roentgenology, radium therapy, and nuclear medicine,
F H Attix, and
R B Theus, and
G E Miller
March 1975,
Journal of the Canadian Association of Radiologists,
F H Attix, and
R B Theus, and
G E Miller
April 1974,
European journal of cancer,
F H Attix, and
R B Theus, and
G E Miller
January 1964,
Acta - Unio Internationalis Contra Cancrum,
F H Attix, and
R B Theus, and
G E Miller
November 1963,
Nature,
