Dose equivalent neutron dosimeter

Radiant energy – Invisible radiation responsive nonelectric signalling

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2504731, 250390, G01T 104, G01T 300

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active

043814549

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.

REFERENCES:
patent: 3735135 (1973-05-01), Bredoux et al.
patent: 4100414 (1978-07-01), Distenfeld
patent: 4163154 (1979-07-01), Wheeler et al.
Dutrannois et al., "A Personal Neutron Monitoring System Based on Solid State Nuclear Track Detectors", 10th Int. Conf. Solid State Nuc. Track Det. Jul. 1979 pp. 527-532.
Eisen et al., "Dev. of Neutron Dosimeters for Fast & Epithermal Neutrons", Book of Papers-5th Intern. Congress of Intern. RPA-vol. II, Jerusalem, Israel, Mar. 1980, pp. 157-160.
Hassib et al., "Improvements of the Electrochemical Etching Technique for Fast Neutron Dosimetry", 7th DOE Workshop on Personnel Neutron Dos., Oct. 1978, Tech. Report No. PNL-2807/UC-48, pp. 71-78.
Josefowicz, "183-Dependence of the Efficiency of Neutron Detection in Polycarbonate by Recording Atom Recoil Tracks" Proceedings-Neutron Monitoring for Radiation Protection Purposes, Int. At. En. Agency-Vienna (1973), pp. 163-190.
Sohrabi et al., "A New Polycarbonate Fast Neutron Personnel Dosimeter," Am. Ind. Hyg. Assoc. J. (39), Jun. 1978, pp. 438-447.
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Balcazar-Garcia et al., "Calibration of CA8015 Cellulose Nitrate for Fast Neutron Dosimetry", Nuc. Inst. & Meth., vol. 161, 1979, pp. 91-95.
Spurny et al., "On the Energetical Dependence of Polymer SSNTD As Fast Neutron Dosimeters", Inter. Conf. on SSNTD, Germany, Sep. 1976, pp. 863-874.
McCall, "Neutron Measurements", DOE Technical Report No. SLAC-PUB-2662, Jan. 1981, pp. 1-4.
Benton et al., "Proton Recording Neutron Dosimeter for Personnel Monitoring" Contributions to the 10th Intern. Conf. on SSNTD, France, Jul. 1979, pp. 1-7.
Sohrabi, "A New Dual Response Albedo Neutron Personnel Dosimeter", Nuclear Inst. & Met. 165 (1979), pp. 135-138.
Hassib et al., "A Wide Energy Range Neutron Dosimeter Using Electrochemical Track Etch Detectors", Solid State Nuclear Track Detectors 10th International Conference, Jul. 1979, pp. 389-401, Pergamon Press publication.

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