AN EXPERIMENTAL SET-UP FOR STUDYING THE POLARIZATION OF FAST NEUTRONS

Journal Article · Mon Jul 01 04:00:00 EDT 1963 · At. Energ. (USSR)

OSTI ID:4650358

Alekseev, N V; Arifkhanov, U R; Vlasov, N A; Davydov, V V; Samoilov, L N

The polarization of neutrons obtained from the T(p,n)He/sup 3/ reaction was determined by scatiering on He/sup 4/ at an angle of 123 deg . A spherical or cylindrical chamber with a glass window on one side was filled to a pressure of 100 atm with He/sup 4/ containing 3 to 5% xenon. The scattered neutrons were counted on a scintillation counter consisting of an activated polystyrene cylinder 70 x 100 mm and a FEU-36 photomultiplier. Light pulses from the helium chamber were also counted with a FEU-38 photomultiplier. The helium chamber and the neutron counter were connected in a fast-slow coincidence scheme in order to distinguish the (n, alpha ) scattering events from other phonons and to measure the spectrum of the recoil alpha particles. A watercooled solenoid consisting of a 1000 turns and made in 50 sections was placed between the tritium target and the helium chamber in order to change the neutron spirt by 90 deg . With an incident proton energy of E/sub p/ = 10.5 Mev, the polarization of neutrons from the T(p,n)He/sup 3/ reaction was measured at an angle of 40 deg in the laboratory system of coordinates. The average asymmetry A/sub o/ was (27.4 plus or minus 3.9)%. The polarization P was equal to (--28.6 plus or minus 4.1)% at an angle of 40 deg . This method will be used to measure the polarization of 5- to 40-Mev neutrons. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-039958
• OSTI ID: 4650358
• Journal Information: At. Energ. (USSR), Journal Name: At. Energ. (USSR) Vol. Vol: 15
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ACTIVATION
ALPHA PARTICLES
ANGULAR DISTRIBUTION
COILS
COINCIDENCE METHODS
CONFIGURATION
ENERGY
FAST NEUTRONS
GLASS
HELIUM 3
HELIUM 4
MEASURED VALUES
MEV RANGE
MIXING
NEUTRON DETECTION
NUCLEAR REACTIONS
PHOTOMULTIPLIERS
PHOTONS
PHYSICS
POLARIZATION
POLYSTYRENE
PRESSURE
PROTON BEAMS
PULSES
SCATTERING
SCINTILLATION COUNTERS
SOUND
SPIN
TARGETS
TRITIUM
VESSELS
WATER COOLANT
WINDOWS
XENON