USE OF Li$sup 6$I(Eu) AS A SCINTILLATION DETECTOR AND SPECTROMETER FOR FAST NEUTRONS

Journal Article · Mon Mar 31 23:00:00 EST 1958 · Nuclear Instr.

DOI:https://doi.org/10.1016/0369-643X(58)90035-5· OSTI ID:4317277

Murray, R B

The scintillation response of europium-activated crystals of Li/sup 6/ to neutrons in the energy range 1 to 14 Mev has been investigated with the crystals maintained at various temperatures. The pulse-height spectrum from monoenergetic neutrons incident on a crystal at room temperature demonstrates a poorly defined and broad fast-neutron peak. Upon cooling the crystal, the fast- neutron peak becomes sharper and assumes a nearly Gaussian shape at temperatures below about --140 deg C. This behavior is attributed to an increased scintillation efficiency of LiI(Eu) to alpha particles at low temperatures. Pulse-height spectra from crystals at the liquid nitrogen point are presented for neutrons from the D(d,n)He/sup 3/, T(d,n)He/sup 4/, and Be/sup 9/(d,n)B/sup 10/ reactions, a Po-Be source, and U/sup 235/ fission. The principal features of Li/ sup 6/I(Eu) as a fast-neutron spectrometer are a relatively high detection efficiency ( approximately 0.1%) and moderate resolution. (auth)

• Research Organization: Oak Ridge National Lab., Tenn.
• NSA Number: NSA-12-009330
• OSTI ID: 4317277
• Journal Information: Nuclear Instr., Journal Name: Nuclear Instr. Vol. Vol: 2
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALPHA PARTICLES
BERYLLIUM 9
BORON 10
COOLING
DEUTERIUM
DEUTERONS
EFFICIENCY
ENERGY RANGE
EUROPIUM
FAST NEUTRONS
FISSION
HELIUM 3
HELIUM 4
LITHIUM IODIDES
MEASURED VALUES
NEUTRON SPECTROMETERS
NUCLEAR REACTIONS
PHOSPHORS
PHYSICS
POLONIUM
PULSES
RESOLUTION
SCINTILLATION COUNTERS
SPECTRA
TEMPERATURE
TRITIUM
URANIUM 235