Threshold region photoproduction of neutral. pi. mesons off complex nuclei

Journal Article · Wed Dec 01 00:00:00 EST 1982 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.26.2548· OSTI ID:6616582

Dodson, G W; Booth, E C; Milder, F L; Parad, B E; Roberts, B L; Tieger, D R; Comuzzi, J

Photoproduction of ..pi../sup 0/ mesons off targets of /sup 6/Li, /sup 12/C, /sup 28/Si, /sup 40/Ca, natural Cd, and natural Pb was studied using a bremsstrahlung beam with endpoint energies of 140, 145, 150, and 155 MeV. Photoproduction from a liquid hydrogen target was employed as a normalization. The measured yields were found to be in disagreement with published theoretical cross sections for /sup 6/Li(..gamma..,..pi../sup 0/)/sup 6/Li and also in disagreement with a simple schematic model which assumed only coherent contributions from the M/sub 1//sub +/ multipole. The schematic model, however, did approximately predict the relative magnitudes of the yield curves for the energy range 14--20 MeV over threshold.

• Research Organization: Physics Department, Boston University, Boston, Massachusetts 02215
• OSTI ID: 6616582
• Journal Information: Phys. Rev. C; (United States), Vol. 26:6
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
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PIONS NEUTRAL
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