NEUTRON YIELDS FROM THE Li$sup 6$(t,n) AND Li$sup 7$(t,n) REACTIONS

Journal Article · Thu Jun 01 04:00:00 EDT 1961 · Atomnaya Energ.

OSTI ID:4843276

Val'ter, A K; Vatset, P I; Kolesnikov, L Ya; Tonapetyan, S G; Chernyavaskii, K K; Shpetnyi, A I

LiF targets, made by evaporating natural lithium (92.48 wt.% Li/sup 7/ and 7.52 wt. % Li/sup 6/) and enriched lithium (90.6 wt.% Li/sup 6/ and 9.4 wt. % Li/sup 7/) onto platinum disks, were struck by tritium particles which had been accelerated up to energies of 2.4 Mev on a horizontal electrostatic generator, and bent at an angle of 60' on a magnetic analyzer. The angular distribution of the neutrons was measured at 0 to 135 deg on a long, boron, proportional counter at tritium energies of 0.358, 0.559, 1.066, 1.218, 1.370, 1.572, and 2.123 Mev. Four measurements of the neutron count rate were carried out on the front and back side of the LiF targets in order to eliminate the background contribution from scattered neutrons and neutrons obtained from the T(t,n) and C(t,n) reactions. A resonance in neutron yield was observed at E = 1.875 Mev in the Li/ sup 6/(t,n) reaction. This corresponds to an excited level of 18.936 Mev in the eompound nucleus Be/sup 9/. Two resonances were observed in the neutron yield of the Li/sup 7/(t,n) reaction at E/sub t/ = 0.765 Mev and E/sub t/= 1.735 Mev. This indicates the presence of excitation levels of 17.78 and 18.46 Mev respectively in the Be/sup 10/ nucleus. The level widths are 170 kev for Be/sup 9/, and 375 and 830 kev respectively for BE/sup 10/. The differential crosssections ior the formation of neutrons at an angle of 0 deg were 37.2 mbarn/ stere and 159 mbarn/stere for the first and second resonances of the Li(t,n) reaction. The total cross-section for the formation of neutrons was 324 plus or minus 32.3 mbarns at E/sub t/ = 1332 plus or minus 83.3 mbarns for the Li/sup 7/(t,n) reaction. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-15-028482
• OSTI ID: 4843276
• Journal Information: Atomnaya Energ., Journal Name: Atomnaya Energ. Vol. Vol: 10
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ANGULAR DISTRIBUTION
BERYLLIUM 10
BERYLLIUM 9
BORON
CARBON
COMPOUND NUCLEI
CROSS SECTIONS
EFFICIENCY
ENERGY LEVELS
ENERGY RANGE
ENRICHMENT
ERRORS
EVAPORATION
EXCITATION
ION BEAMS
LITHIUM
LITHIUM 6
LITHIUM 7
LITHIUM FLUORIDES
MAGNETIC FIELDS
MEASURED VALUES
MEV RANGE
NEUTRONS
NUCLEAR REACTIONS
PHYSICS
PLATES
PLATINUM
PROPORTIONAL COUNTERS
RESONANCE
SCATTERING
TARGETS
TRITIUM
TRITONS
VAN DE GRAAFF ACCELERATORS