THE DISINTEGRATION OF SILICON BY FAST NEUTRONS
Technical Report
·
OSTI ID:4663795
The Si/sup 28/(n,p)Al/sup 28/, Si/sup 28/(n, alpha )Mg/sup 25/, and Si/ sup 29/(n, a)Mg/sup 26/ reactions were observed in a silicon solid state detector with a barrier depth equivalent to the range of a 7.5-Mev proton. A yield curve for the reactions was measured between neutron energies of 4.6 and 8.5 Mev with an energy spread between 80 and 40 kev. At E/sub n/ = 8.5 Mev, transitions to two levels of Mg/sup 26/, four of Mg/sup 25/ and nine of Al/sup 28/ were observed. In the disintegration of Si/sup 28/, strong resonant structure was observed and below E/sub n/ = 6 Mev, both reactions are strongly inhibited by the coulomb barrier. Charged particle penetrability calculations predict the relative magnitudes of the Si/sup 28/ (n, alpha ) and (n,p) reaction cross sections. A fast neutron spectrometer using a Si/sup 29/ solid state counter is proposed. (auth)
- Research Organization:
- Rice Univ., Houston, Tex.
- NSA Number:
- NSA-17-034884
- OSTI ID:
- 4663795
- Report Number(s):
- TID-19047; CONF-13-6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ABSORPTION
ALPHA PARTICLES
ALUMINUM 28
CHARGED PARTICLES
CONFERENCE
CROSS SECTIONS
CRYSTAL COUNTERS
ELECTRIC POTENTIAL
ENERGY RANGE
FAST NEUTRONS
MAGNESIUM 25
MAGNESIUM 26
MEASURED VALUES
MEV RANGE
NEUTRON SPECTROMETERS
NUCLEAR REACTIONS
NUMERICALS
PHYSICS
PROTONS
RESONANCE
SEMICONDUCTORS
SILICON 28
SILICON 29
TEXAS
TRANSIENTS
ALPHA PARTICLES
ALUMINUM 28
CHARGED PARTICLES
CONFERENCE
CROSS SECTIONS
CRYSTAL COUNTERS
ELECTRIC POTENTIAL
ENERGY RANGE
FAST NEUTRONS
MAGNESIUM 25
MAGNESIUM 26
MEASURED VALUES
MEV RANGE
NEUTRON SPECTROMETERS
NUCLEAR REACTIONS
NUMERICALS
PHYSICS
PROTONS
RESONANCE
SEMICONDUCTORS
SILICON 28
SILICON 29
TEXAS
TRANSIENTS