Experimental test of virtual photon theory

Journal Article · Fri Jul 01 04:00:00 EDT 1983 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.28.150· OSTI ID:5820504

Dodge, W R; Hayward, E; Wolynec, E

An isochromat of the E1 virtual photon spectrum has been measured by counting the number of ground-state protons emitted by the 16.28 MeV isobaric analog state in /sup 90/Zr as a function of incident electron energy in the range 17--105 MeV. The experimental results reproduce well the distorted wave Born approximation spectra for a point Zr nucleus for electron energies up to 30 MeV. A radiator was used for electron energies of 60--100 MeV to measure the photodisintegration plus electrodisintegration cross section. These results showed that the Davies-Bethe-Maximon bremsstrahlung cross section magnitude yields the same result as the electrodisintegration results below 30 MeV where size corrections for the finite extent of the nucleus are minimal. As E/sub 0/ increases to 105 MeV the need for such corrections becomes manifest. Several such corrections are discussed. As by-products of this study the quantity GAMMA/sub ..gamma../GAMMA0/GAMMA was determined to be 63.8 +- 1.9 eV or 66.1 +- 2.0 eV depending on the virtual photon spectrum used in analysis. The GAMMA/sub p//sub 2//GAMMA0 ratio was also determined to be 0.58 +- 0.02. Combining these results yields for GAMMA/sub ..gamma../ 100.8 +- 5.0 eV or 104.4 +- 5.2 eV.

• Research Organization: National Bureau of Standards, Washington, DC 20234
• OSTI ID: 5820504
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 28:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651723* -- Nuclear Properties & Reactions
A=90-149
Experimental-- Energy Levels & Transitions-- (-1987)
651725 -- Nuclear Properties & Reactions
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
BORN APPROXIMATION
BREMSSTRAHLUNG
CAPTURE
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DWBA
E1-TRANSITIONS
ELECTROMAGNETIC RADIATION
ELECTRON REACTIONS
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
FERMIONS
HADRONS
INTERMEDIATE MASS NUCLEI
ISOBARIC ANALOGS
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEPTON REACTIONS
MASSLESS PARTICLES
MEV RANGE
MEV RANGE 10-100
MULTIPOLE TRANSITIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
PHOTONS
PROTONS
RADIATIONS
RADIOISOTOPES
STABLE ISOTOPES
TARGETS
TESTING
VIRTUAL PARTICLES
ZIRCONIUM 90
ZIRCONIUM 90 TARGET
ZIRCONIUM ISOTOPES