Test of vacuum polarization by precise investigation of Delbrueck scattering

Journal Article · Wed Apr 01 04:00:00 EST 1981 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.23.1375· OSTI ID:6789106

Rullhusen, P; Mueckenheim, W; Smend, F; Schumacher, M; Berg, G P.A.; Mork, K; Kissel, L

Using sources of /sup 24/Na, differential cross sections for elastic scattering of 2.754 MeV photons have been measured for angles between 60 and 120/sup 0/ and charge numbers of 30, 42, 50, and 58 with an accuracy of 2.8% on the average. For the cases covered by experiment, Delbrueck scattering amplitudes have been calculated on the basis of the lowest-order Feynman graphs with an average numerical accuracy of 1%. For the same cases Rayleigh scattering amplitudes have been calculated on the basis of the second-order S matrix using Dirac-Hartree-Fock-Slater wave functions. These investigations confirm the lowest-order Delbrueck theory with an accuracy of 5%. This corresponds to a new test of vacuum polarization of the order ..cap alpha..(Z..cap alpha..)/sup 2/.

• Research Organization: II. Physikalisches Institut, University of Goettingen, D-3400 Goettingen, Germany
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6789106
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 23:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
AMPLITUDES
ANGULAR DISTRIBUTION
CROSS SECTIONS
DELBRUECK SCATTERING
DIAGRAMS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELASTIC SCATTERING
ELECTRODYNAMICS
ELEMENTS
ENERGY RANGE
FEYNMAN DIAGRAM
FIELD THEORIES
FUNCTIONS
INELASTIC SCATTERING
MATRICES
METALS
MEV RANGE
MEV RANGE 01-10
MOLYBDENUM
NUCLEAR REACTIONS
PERTURBATION THEORY
PHOTONUCLEAR REACTIONS
QUANTUM ELECTRODYNAMICS
QUANTUM FIELD THEORY
REFRACTORY METALS
S MATRIX
SCATTERING
SCATTERING AMPLITUDES
TIN
TRANSITION ELEMENTS
VACUUM POLARIZATION
WAVE FUNCTIONS
ZINC