Comparison of Several Methods for the Photographic Detection of Thermal Neutron Images
Journal Article
·
· Journal of Applied Physics
Methods of photographic detection of thermal neutron images were studied and compared with regard to photo graphic speed, relative neutron-gamma response, and image sharpness qualities. All these compas-isons were made using a low gamma content, monochromatic neutron beam (1.05 A) having an intensity of 3 x 105 neutrons/cm2sec. The fastest speed, best neutron-gamma response of the direct exposure methods, and good image sharpness were obtained using a direct exposure method exploying a B-10 loaded scintillator and type F x-ray film. Gadolinium and rhodium intensifier screens with type KK film also yield favorable results by the direct exposure method (film and intensifier screens exposed to the neutron beam together). Results are also reported for the use of indium, cadmium, silver, and gold screens. The transfer method, in which the photographic film is exposed only to the radioactive decay radiation of an image- carrying metallic screen, and not to the neutron beand itself, is useful not only because no effect on the image is produced by gamma radiation in the neutron beam, but also because improved image sharpness is obtained. In the cases of indium and gold (the two materials useful for the transfer method in the neutron flux available for this study), the improved image resolution obtained with the transfer method results because the high energy prompt (n, gamma ) radiation is not detected on the film.
- Research Organization:
- Argonne National Lab., Ill.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-16-008922
- OSTI ID:
- 4809272
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 1 Vol. 33; ISSN JAPIAU; ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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