Richard Hollis Griffith

US Patent:

43814549, Apr 26, 1983

Filed:

Jan 7, 1981

Appl. No.:

6/222867

Inventors:

Richard V. Griffith - Pleasanton CA
Dale E. Hankins - Livermore CA
Luigi Tomasino - Rome, IT
Mohamed A. M. Gomaa - Heliopolis, EG

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

G01T 104
G01T 300

US Classification:

2504721

Abstract:

A neutron dosimeter is disclosed which provides a single measurements indicating the amount of potential biological damage resulting from the neutron exposure of the wearer, for a wide range of neutron energies. The dosimeter includes a detecting sheet of track etch detecting material such as a carbonate plastic, for detecting higher energy neutrons, and a radiator layer containing conversion material such as. sup. 6 Li and. sup. 10 B lying adjacent to the detecting sheet for converting moderate energy neutrons to alpha particles that produce tracks in the adjacent detecting sheet. The density of conversion material in the radiator layer is of an amount which is chosen so that the density of tracks produced in the detecting sheet is proportional to the biological damage done by neutrons, regardless of whether the tracks are produced as the result of moderate energy neutrons striking the radiator layer or as the result of higher energy neutrons striking the sheet of track etch material.