FINAL ENGINEERING REPORT ON AUTOMATIC SCANNING OF NUCLEAR EMULSIONS. Report No. 2644-1

Technical Report · Tue Dec 01 04:00:00 EST 1959

OSTI ID:4195103

Speh, K C; Becker, S

The feasibility of designing automatic instruments to scan nuclear emulsions and detect, count, or sort particle tracks according to grain density or length was studied. After investigating the characteristics of nuclear emulsions and several possible scanning techniques, an experimental model and an evaluation model of an Automatic Nuclear Emulsion Scanner, incorporating electron- beam scanning, were designed and developed to count the proton tracks in neutron film-badges. Tests at ihe Brookhaven Health Physics Division indicated that the evaluation model has an energy response that is similar to that of visual techniques from 2 to 15 Mev and poorer from 0.5 to 2 Mev, and a counting speed that has proved comparable with that of visual techniques at low exposures and considerably greater at exposures that exceed 1 MPL. The count of the scanner is easier to standardize and check, and is less disturbed by gamma fogging. Similar techniques are proposed for alpha-particle spectrometry, neutron spectrometry, and sorting high-energy proton-recoil tracks by grain density. (auth)

• Research Organization: Airborne Instruments Lab. Div. of Cutler-Hammer, Inc., Deer Park,N.Y.
• NSA Number: NSA-14-008551
• OSTI ID: 4195103
• Report Number(s): NYO-2926
• Country of Publication: United States
• Language: English

Related Subjects

ALPHA SPECTROMETERS
CONTAMINATION
COUNTERS
DENSITY
DETECTION
DOSEMETERS
ELECTRON BEAMS
ENERGY
ENGINEERING AND EQUIPMENT
ERRORS
FILM BADGES
GAMMA RADIATION
GRAIN SIZE
INSPECTION
INSTRUMENTS
MPE
NEUTRON DETECTION
NEUTRON SPECTROMETERS
NUCLEAR EMULSIONS
OPERATION
PARTICLE TRACKS
PHOTOGRAPHIC FILM DETECTORS
PLANNING
PROTONS
RADIATION DOSES
RECOILS
SAFETY
STANDARDS