Counting efficiencies of shadow shield whole body counter for adult and paediatric reference computational phantoms.

Shadow Shield Whole Body Counter (SSWBC) is used to estimate internal dose of radiation workers due to the intake of fission and activation products. The SSWBC geometry was numerically modelled in FLUKA code. The computational model was validated by comparing the experimental and simulated counting efficiencies (CEs), also known as response, using Bhabha Atomic Research Centre (BARC) reference BOttle Mannequin Absorption (BOMAB) phantom.

Estimation and analysis ofvalues forI using paediatric mesh type reference computational phantoms.

This study examines the effect of paediatric mesh-type reference computational phantoms on organvalues resulting from radioiodine (I) intake. Using Geant4, we estimatedIvalues for 30 radiosensitive target tissues due to emission from the thyroid (Target ← Thyroid) in these phantoms. Our results show thatvalues differ between male and female phantoms of the same age andvalues also decrease as phantom age increases.

I dose coefficients for a reference population using age-specific models.

Age-specific dose coefficients are required to assess internal exposure to the general public. This study utilizes reference age-specific biokinetic models of iodine to estimate the total number of nuclear disintegrations ã(,τ) occurring in source regions () during the commitment time (τ). Age-specific S values are estimated for 35 target regions due toI present in 22using data from 10 paediatric reference computational phantoms (representing five ages for both sexes) published recently by the International Commission of Radiation Protection (ICRP).