Measurement of the differential cross section for radiative formation of helium-four by deuteron bombardment of deuterium at 376 MeV

Thesis/Dissertation · Fri Jan 01 04:00:00 EST 1982

OSTI ID:6845442

Silverman, B H

Differential cross sections have been measured for d + d..-->../sup 4/He + ..gamma.. at theta/sub ..gamma../(cm) = 73/sup 0/ and 91/sup 0/ for a deuteron energy of 376 MeV. The measurements were performed at the Laboratoire National Saturne at Saclay, France. A two-arm coincidence method was employed, detecting the /sup 4/He in the SPES I magnetic spectrometer and the photon in one of two lead glass Cherenkov counters. Results are a factor of 60 lower than previously reported by Akimov et al. at 404 MeV, and about a factor of two higher than the measurements of the inverse reaction performed at Bonn by Arends et al. Because of the large statistical and systematic uncertainties of the measurements, the results are not inconsistent with time-reversal invariance in the electromagnetic interaction of hadrons involving purely isoscalar photons. Data corroborate the reported deviation from the sin/sup 2/2theta angular distribution characteristic of the electric quadrupole process that describes the reaction at lower energies. Results are also presented for the reactions pd..-->../sup 3/He..gamma.., dp..-->../sup 3/He..gamma.., pd..-->../sup 3/He..pi../sup 0/, pd..-->..t..pi.. +, and pp..-->..d..pi.. +. Their relation to the dd..-->../sup 4/He..gamma.. measurements as a verification of the experimental technique and of the absolute normalization is discussed.

• Research Organization: California Univ., Los Angeles (USA)
• OSTI ID: 6845442
• Country of Publication: United States
• Language: English

Related Subjects

651225* -- Nuclear Properties & Reactions
A=1-5
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BOSONS
CHARGED-PARTICLE REACTIONS
COINCIDENCE METHODS
COUNTING TECHNIQUES
DATA
DEUTERIUM TARGET
DEUTERON REACTIONS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FUSION REACTIONS
HADRON REACTIONS
HADRONS
HELIUM 3
HELIUM 4
HELIUM ISOTOPES
HYDROGEN 1 TARGET
HYDROGEN ISOTOPES
INFORMATION
ISOTOPES
LIGHT NUCLEI
MASSLESS PARTICLES
MESONS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL DATA
ODD-EVEN NUCLEI
PHOTONS
PIONS
PIONS NEUTRAL
PIONS PLUS
PROTON REACTIONS
PSEUDOSCALAR MESONS
RADIOISOTOPES
STABLE ISOTOPES
TARGETS
TRITIUM
YEARS LIVING RADIOISOTOPES