Elsevier

Nuclear Physics A

Volume 197, Issue 2, 18 December 1972, Pages 515-528
Nuclear Physics A

Proton small angle multiple scattering at 600 MeV

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Abstract

The small angle multiple scattering of 600 MeV protons from targets of C, Al, Cu, Cd, and Pb has been observed using two-dimensional multiwire proportional detectors (MWPC) placed in the proton beam. Data with high statistical accuracy near zero degrees are presented for the first time. The results compared to a modified Molière calculation agree within a few percent for the rms Gaussian angle, but the data do not decrease with angle as rapidly as the Molière prediction for angles greater than 3 or 4 times the rms angle for the lighter targets. The deviation in the tail of the distributions is especially evident in carbon, and is attributed to the presence of nuclear scattering and the finite size of the target nucleus. The present theories are not able to reproduce these tail distributions.

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††

Work supported in part by the US Atomic Energy Commission.

Present address: Michelson Laboratories, Naval Weapons Center, China Lake, California 93555.

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