Article

Organ Doses and Dose Equivalents for Neutrons above 20 MeV

DOI:cgi/content/short/70/1-4/391
Source: OAI

ABSTRACT MCNP Monte Carlo calculations with an extended cross section data set have been performed for an anthropomorphic MIRD (ADAM) phantom in the neutron energy range between 20 and 100 MeV. The irradiation conditions vary from 0o (frontal incidence) up to 75o to the left side of the MIRD phantom. From the fluence calculations, organ doses and dose equivalents are derived using the kerma approximation. The quality factor as a function of neutron energy for the calculation of effective dose equivalent, H E , is derived from initial charged particle spectra produced in an ICRU tissue element by primary neutrons. Above 20 MeV and approximation was applied. Resulting organ doses and dose equivalents are compared with a data set published by Nabelssi and Hertel (1993).

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Keywords

anthropomorphic MIRD
 
dose equivalents
 
effective dose equivalent
 
fluence calculations
 
frontal incidence
 
H E
 
Hertel
 
ICRU tissue element
 
irradiation conditions
 
left side
 
MCNP Monte Carlo calculations
 
MIRD phantom
 
Nabelssi
 
neutron energy
 
neutron energy range
 
organ doses
 
particle spectra
 
primary neutrons
 
quality factor
 
Resulting organ doses