The Elastic Scattering and Capture of Protons by Oxygen

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Abstract
The yield of elastically scattered protons from oxygen was measured with a magnetic analyzer which detected protons scattered through laboratory angles of 159° to 169°. Using protons accelerated by an electrostatic generator, the proton energy range from 0.6 to 4.5 Mev was covered in 4.4-kev or smaller steps. Two sharp resonances were observed, one at an incident proton energy of 2.66 Mev with a width of 19.9 kev, and the second at 3.47 Mev with an observed width less than 3.5 kev. Near 4.0 Mev a broad maximum in the cross section was obtained, and a broad resonance appears to give another maximum slightly above 4.5 Mev. The resonance at 2.66 Mev appeared as a nearly symmetrical dip in the scattering cross section.

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