HEPData Search

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Small Angle Compton Scattering on Hydrogen and Deuterium

Criegee, L. ; Franke, G. ; Giese, A. ; et al.

Nucl.Phys.B 121 (1977) 31-37, 1977.

Inspire Record 118810 DOI 10.17182/hepdata.35467

We have measured elastic scattering of 5 and 6 GeV photons on hydrogen and deuterium in the angular range 10–50 mrad. On hydrogen we observe a forward diffraction peak with a slope of 8.5 (GeV/ c ) −2 . The extrapolated forward cross sections in units μ b/(GeV/ c ) 2 are 0.82 ± 0.04 at 5 GeV and 0.79 ± 0.04 at 6 GeV. They are consistent with the calculated amplitudes obtained from total cross section measurements via the optical theorem and dispersion relations assuming negligible contributions of spin-dependent amplitudes. Deuterium cross sections show a transition from coherent scattering at low | t | to incoherent scattering at higher | t |. They indicate that the isovector exchange amplitude a 1 is very small compared to the isoscalar a 0 . We obtain |a 1 | 2 /|a 0 +a 1 | 2 =0.13±0.09 , Re (a 0 a ∗ 1 )/|a 0 +a 1 | 2 =0.0±0.03, at 5 GeV , |a 1 | 2 /|a 0 +a 1 | 2 =−0.12±0.15 , Re (a 0 a ∗ 1 )/|a 0 +a 1 | 2 =0.10±0.04, at 6 GeV .

2 data tables

Table 1

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Table 2

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MEASUREMENT OF THE ANGULAR DISTRIBUTION OF COMPTON SCATTERING OFF PROTONS gamma p ---> gamma p BETWEEN 800-MeV AND 950-MeV

de Marne, Klaus-Dieter ;

BONN-IR-79-5, 1979.

Inspire Record 140558 DOI 10.17182/hepdata.50146

None

6 data tables

Table 1

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MEASUREMENT OF THE ANGULAR DISTRIBUTION OF COMPTON SCATTERING OFF PROTONS gamma p ---> gamma p BETWEEN 800-MeV AND 950-MeV

Leu, Peter ;

PhD Thesis, 1979.

Inspire Record 140559 DOI 10.17182/hepdata.50225

6 data tables

Table 1

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Proton Compton Scattering Measurement From 450 to 1350 MeV Near 90-degrees in the Center-of-Mass System

Rust, D.R. ; Eisenhandler, E. ; Mostek, P.J. ; et al.

Phys.Rev.Lett. 15 (1965) 938-941, 1965.

Inspire Record 944922 DOI 10.17182/hepdata.21794

None

1 data table

Table 1

No description provided.

Elastic Scattering of Gamma Rays by Protons

Stiening, R.F. ; Loh, E. ; Deutsch, Martin ;

Phys.Rev.Lett. 10 (1963) 536-537, 1963.

Inspire Record 46876 DOI 10.17182/hepdata.21849

None

1 data table

Table 1

No description provided.

Proton Compton Effect for 300-MeV Photons

Gray, E.R. ; Hanson, A.O. ;

Phys.Rev. 160 (1967) 1212-1215, 1967.

Inspire Record 944949 DOI 10.17182/hepdata.26568

The scattering of photons by protons has been measured with a spark-chamber technique using 335-MeV bremsstrahlung. The experimental values obtained at 90° and 135° are compared with those calculated by Contogouris using dispersion relations. The agreement is reasonable except for a persistently low point for 310 MeV at 90°.

3 data tables

Table 1

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Table 2

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Table 3

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