INTERACTION OF FISSION FRAGMENTS WITH ORGANIC SCINTILLATORS
A pulse-shape discriminator circuit was used for the measurement of the pulse heights of the slow components of light pulses from organic scintillators excited by different types of particles: electrons, protons, alpha particles, and fission fragments. Three types of organic scintillators were employed: a crystal (stilbene), a liquid (7 g PPO and 0.5 g M2-POPOP in 1 liter of toluene), and a plastic (NE150). The relationship of the pulse heights of the slow components for excitation with electrons, protons, and alpha particles was similar for all three scintillators. However, fission fragments produced a slow component pulse height similar to protons in stilbene and the plastic but more like electrons in the liquid. The pulse-height distributions of total light pulses from the scintillators excited by the alpha and spontaneous fission emissions of Cf/sup 252/ were measured. The alpha-particle and fission-event spectra were resolved only with the liquid scintillator giving a pulse-height spread of the fission distribution peak of 40%. From the maximum of the fission spectra it was calculated that the most probable energy of fission produced the same pulse height as an electron with 1/75th that energy would produce. The alpha particles and the fission events were counted with 100% efficiency and a value of 31.0 plus or minus 0.5 was obtained for the alpha to fission disintegration ratio of Cf/sup 252/. (auth)
- Research Organization:
- Argonne National Lab., Ill.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-037441
- OSTI ID:
- 4659401
- Journal Information:
- Rev. Sci. Instr., Journal Name: Rev. Sci. Instr. Vol. Vol: 34
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
CALIFORNIUM 252
CIRCUITS
DECAY
DISCRIMINATORS
DISTRIBUTION
ELECTRONS
ENERGY
FISSION
FISSION PRODUCTS
INSTRUMENTS AND INSTRUMENTATION
INTERACTIONS
MATHEMATICS
MEASURED VALUES
NUCLEI
ORGANIC COMPOUNDS
PERFORMANCE
PHOSPHORS
POLYMERS
PROTONS
PULSE ANALYZERS
PULSES
SCINTILLATION COUNTERS
SCINTILLATIONS
SPECTRA
STILBENE
TOLUENE