sup 3 H( p ,. gamma. ) sup 4 He reaction and the (. gamma. , p )/(. gamma. , n ) ratio in sup 4 He

Journal Article · Mon Oct 01 04:00:00 EDT 1990 · Physical Review, C (Nuclear Physics); (USA)

OSTI ID:6058541

Feldman, G; Balbes, M J; Kramer, L H; Williams, J Z; Weller, H R ^[1]; Tilley, D R ^[2]

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1. Duke University, Durham, NC (USA) Triangle Universities Nuclear Laboratory, Durham, NC (USA)
2. North Carolina State University, Raleigh, NC (USA) Triangle Universities Nuclear Laboratory, Durham, NC (USA)

The absolute differential cross section for the {sup 3}H({ital p},{gamma}){sup 4}He reaction has been measured at {theta}{sub {gamma}}=90{degree} for {ital E}{sub {ital p}}=2.0--15.0 MeV, corresponding to photon energies {ital E}{sub {gamma}}=21.3--31.1 MeV. The present results are 35% lower than previously measured ({ital p},{gamma}) cross sections and are in excellent agreement with recent ({gamma},{ital p}) data obtained with monoenergetic photons. Comparing our results to current photoneutron cross sections gives a ratio {sigma}({gamma},{ital p})/{sigma}({gamma},{ital n})=1.09{plus minus}0.17 for {ital E}{sub {gamma}}=24--31 MeV. This ratio is consistent with conventional theoretical predictions, indicating that no charge-symmetry violation in {sup 4}He is required.

• OSTI ID: 6058541
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 42:4; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651220* -- Nuclear Properties & Reactions
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ANGULAR DISTRIBUTION
BARYON REACTIONS
BARYONS
CAPTURE
CHARGE DISTRIBUTION
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ELECTROSTATIC ACCELERATORS
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
ENERGY RANGE
EVEN-EVEN NUCLEI
FERMIONS
GAMMA RADIATION
HADRON REACTIONS
HADRONS
HELIUM 4
HELIUM ISOTOPES
IONIZING RADIATIONS
ISOTOPES
LIGHT NUCLEI
MEV RANGE
MEV RANGE 01-10
MEV RANGE 10-100
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
PHOTONEUTRONS
PHOTONUCLEONS
PHOTOPROTONS
PROTON REACTIONS
PROTONS
RADIATIONS
STABLE ISOTOPES
SYMMETRY BREAKING
TARGETS
TRITIUM TARGET
VAN DE GRAAFF ACCELERATORS