AN IMPROVED Li$sup 6$-LOADED GLASS SCINTILLATOR FOR NEUTRON DETECTION
Journal Article
·
· Nuclear Instr. & Methods
A cerium activated, Li/sup 6/-loaded, glass scintillator of improved scintillation efficiency and Li/sup 6/ content was develope and used for detecting neutrons with energies from thermal to 80 kev by time-of-flight techniques. The following properties of a glass scintillator ( approximately 1.5" thick) with 0.045 x 10 Li/sup 6/ atoms/cm/sup 2/ were determined: an efficiency of 20% for detecting neutrons of 1-kev energy, a negligible background due to gamma -rays of energy < 1.3-Mev, a resolution of 25% for the Li/sup 6/(n, alpha )T peak, a pulse wdth rise time approximately 4 nanosec and a decay approximately 100 nanosec into an impedance of 100 ohms, and a time resolution <2 nanosec when using a fast-slow'' coincidence system and annihilation quanta from Na/sup 22/. These properties were exploited in measuring the neutron energy spectrum from the reaction Li/sup 7/(p,n)Be/sup 7/ using the ORNL pulsed Van de Graaff and the associated nanosec time-offlight spectrometer. For a proton energy 15 kev above the reaction threshold the neutron energy spectrum extended from 5 to 80 kev. Neutron transmission measurements up to several kev also demonstrate the use of the scintillator with a fast chopper neutron spectrometer. Lithium and boron loaded glass scintillators were compared and it is concluded that lithium glass is, in general, the more suitable for neutron detection. (auth)
- Research Organization:
- Oak Ridge National Lab., Tenn.
- NSA Number:
- NSA-16-005541
- OSTI ID:
- 4805295
- Journal Information:
- Nuclear Instr. & Methods, Journal Name: Nuclear Instr. & Methods Vol. Vol: 13
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
ALPHA PARTICLES
BACKGROUND
BERYLLIUM 7
BORON
EFFICIENCY
ENGINEERING AND EQUIPMENT
EPITHERMAL NEUTRONS
FAST NEUTRONS
GAMMA RADIATION
GLASS
LITHIUM 6
NEUTRON DETECTION
NUCLEAR REACTIONS
PROTONS
RESOLUTION
SCINTILLATION COUNTERS
SODIUM 22
SPECTRA
THERMAL NEUTRONS
TRITIUM
VAN DE GRAAFF ACCELERATORS
VELOCITY
BACKGROUND
BERYLLIUM 7
BORON
EFFICIENCY
ENGINEERING AND EQUIPMENT
EPITHERMAL NEUTRONS
FAST NEUTRONS
GAMMA RADIATION
GLASS
LITHIUM 6
NEUTRON DETECTION
NUCLEAR REACTIONS
PROTONS
RESOLUTION
SCINTILLATION COUNTERS
SODIUM 22
SPECTRA
THERMAL NEUTRONS
TRITIUM
VAN DE GRAAFF ACCELERATORS
VELOCITY