Those who had film badges
for the explosions were made to hand them in and they were never labelled to show who was wearing them."
Unlike film badges
, pocket dosimeters provide no permanent, legal record of exposure.
A: "That's film badge
to determine, to detect the amount of radiation you've received in the area."
When the soldiers' film badges
recorded unsafe levels of radioactivity, the men were told to take multiple showers and change their clothes.
Last year, the Defense Nuclear Agency (DNA) computed the participants' test-related radiation exposures, based on dosimeter readings from the 6,300 who had worn film badges
, and found no evidence that overexposures had occurred.
In addition to film badges
worn at the collar level, nuclear medicine technologists also wear ring badges to measure radiation dose received as a result of handling radioactive materials.
Crucially the photograph shows the men, Ronald Coates, John Carr, Peter Cutforth and Harry Rowlands wearing dosimeters, film badges
used to measure radiation exposure.
Monitoring is performed with personnel dosimeters such as pocket dosimeters, film badges
and thermoluminescent dosimeters.