Elastic Scattering of Protons from B11 and N14

George W. Tautfest and Sylvan Rubin
Phys. Rev. 103, 196 – Published 1 July 1956
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Abstract

The absolute differential cross sections for the elastic scattering of protons by B11 and N14 have been measured with a probable error of 7%. The cross section for B11(p, p) was measured at a center-of-mass angle of 152° 36′ for proton energies from 600 to 2000 kev. A marked scattering anomaly is observed at a proton energy of 675 (2) kev. The cross section for N14(p, p) was measured at a center-of-mass angle of 152° for proton energies from 850 to 1900 kev. Scattering anomalies were observed at proton energies 1.060 (½+), 1.555 (½+), 1.740 (32 or 52) and 1.803 (32 or 52) Mev. The indicated spin and parity assignments for the corresponding levels in the compound nucleus are consistent with the results of this experiment. The off-resonance cross sections exhibit marked variations from the Rutherford cross sections over the entire range of energies studied.

  • Received 23 March 1956

DOI:https://doi.org/10.1103/PhysRev.103.196

©1956 American Physical Society

Authors & Affiliations

George W. Tautfest

  • Stanford Research Institute, Menlo Park, California and High-Energy Physics Laboratory, Stanford University, Stanford, California

Sylvan Rubin

  • Stanford Research Institute, Menlo Park, California

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Vol. 103, Iss. 1 — July 1956

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