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Pi0 photoproduction from complex nuclei

Meyer, W.T. ; Browman, A. ; Hanson, K. ; et al.
Phys.Rev.Lett. 28 (1972) 1344-1347, 1972.
Inspire Record 75485 DOI 10.17182/hepdata.21444

The photoproduction yields of π0 mesons from D2, Be, C, Al, Cu, Ag, and Pb targets have been measured at peak bremsstrahlung energies of 4.25, 5.6, 7.8, and 9.6 GeV. The A dependence of π0 photoproduction is found to be almost independent of energy in this range in contrast to vector-meson dominance predictions.

1 data table
Table 1

A-EFFECTIVE IS SIG(GAMMA A --> PI0 A)/SIG(GAMMA NUCLEON --> PI0 NUCLEON). IT IS NORMALIZED RELATIVE TO THE VALUE FOR DEUTERIUM WHICH IS CALCULATED WITH GLAUBER CORRECTIONS.


Neutron-proton and neutron-deuteron total cross-sections at 4.0 and 5.7 gev/c

Parker, E.F. ; Gustafson, H.Richard ; Jones, Lawrence W. ; et al.
Phys.Lett.B 31 (1970) 246-249, 1970.
Inspire Record 63208 DOI 10.17182/hepdata.6170

The np and nd total cross sections have been measured directly with a neutron beam with momenta of 4.0 ± 0.6 and 5.7 ± 0.6 GeV/ c . The data are compared with the previous nucleon-nucleon and nucleon-deuteron results, and the deuteron screening term was also evaluated. The measured total cross section are 43.1 ± 0.6 and 80.3 ± 1.9 mb at 4.0 GeV/ c and 42 ± 0.6 and 77.8 ± 1.3 mb at 5.7 GeV/ c .

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Photoproduction of pi0 Mesons in Hydrogen

Koester, L.J. ; Mills, F.E. ;
Phys.Rev. 105 (1957) 1900-1913, 1957.
Inspire Record 945000 DOI 10.17182/hepdata.26900

This paper reports measurements of the total cross section from 150 to 240 Mev of incident photon energy and measurements of the 135° differential cross section from 180 to 215 Mev. A Monte Carlo evaluation of the γ-ray telescope efficiency by means of an electronic digital computer is outlined. The combined results indicate that a small but finite amount of S-state production occurs and that the angular distribution becomes flatter as the energy decreases. The latter effect is associated with production in unenhanced P-states and with a lack of electric quadrupole production. Good agreement with the Chew-Low theory is demonstrated by a comparison between the photoproduction and scattering of π0-mesons, where the scattering cross sections are derived from those for charged mesons by charge independence.

1 data table
Table 1

No description provided.