Method of determining beryllium from the (. cap alpha. , n) reaction

Journal Article · Sun Feb 01 04:00:00 EST 1987 · Sov. At. Energy (Engl. Transl.); (United States)

OSTI ID:5096427

Chyong, F N; Ter-Akop'yan, G M; Kabachenko, A P

The (..cap alpha.., n) reaction on /sup 9/Be has long been used to produce neutrons by means of radioisotopes. The authors have improved the sensitivity by measuring coincidences between the 4.439 MeV ..gamma.. rays and the neutrons from /sup 9/Be(..cap alpha.., n)/sup 12/C. We used a /sup 210/Po ..cap alpha.. source of output 3 x 10/sup 8/ sec/sup -1/ deposited on stainless steel of thickness 4 mm as a patch of diameter 7 mm. The active layer was coated with 270 ..mu..g/cm/sup 2/ of Al/sub 2/O/sub 3/ to prevent the specimens and the walls of the chamber from being contaminated with polonium. The distance between the source and the specimen was 1 mm, and the air was not evacuated from the chamber. The chamber was placed between two scintillation counters containing bismuth germanate single crystals (diameter 8 cm, height 5 cm, distance between them 0.8 cm), which were placed within the sensitive volume of a neutron detector containing 56 counters filled with /sup 3/He. The probability of recording a single neutron was 0.48.

• OSTI ID: 5096427
• Journal Information: Sov. At. Energy (Engl. Transl.); (United States), Journal Name: Sov. At. Energy (Engl. Transl.); (United States) Vol. 61:2; ISSN SATEA
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPE AND RADIATION SOURCES
070201 -- Radiation Sources-- Design
Fabrication & Operation
440101 -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
651320* -- Nuclear Properties & Reactions
A=6-19
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY RADIOISOTOPES
ALPHA REACTIONS
ALPHA SOURCES
BARYONS
BERYLLIUM 9 TARGET
BGO DETECTORS
CHARGED-PARTICLE REACTIONS
COINCIDENCE METHODS
COUNTING TECHNIQUES
CROSS SECTIONS
DATA ACQUISITION SYSTEMS
DAYS LIVING RADIOISOTOPES
DETECTION
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
FERMIONS
GAMMA DETECTION
GAMMA RADIATION
HADRONS
HE-3 COUNTERS
HEAVY NUCLEI
ION SOURCES
IONIZING RADIATIONS
ISOTOPES
MEASURING INSTRUMENTS
NEUTRON DETECTION
NEUTRON DETECTORS
NEUTRON SOURCES
NEUTRONS
NUCLEAR REACTION YIELD
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
PARTICLE SOURCES
POLONIUM 210
POLONIUM ISOTOPES
PROPORTIONAL COUNTERS
RADIATION DETECTION
RADIATION DETECTORS
RADIATION SOURCES
RADIATIONS
RADIOISOTOPES
SCINTILLATION COUNTERS
SCINTILLATION COUNTING
SENSITIVITY
SOLID SCINTILLATION DETECTORS
TARGETS
YIELDS