SYMPOSIA PAPER Published: 01 January 2001

New Measurements of the H(n,n)H Angular Distribution


Measurements have been made of the shape of the hydrogen differential neutron scattering cross section standard at 10 MeV neutron energy. The data were obtained at the Institute of Nuclear and Particle Physics at Ohio University using the D(d,n) reaction as the neutron source. Two different thin films of polypropylene mounted on tantalum backings were used as the hydrogenous samples in this experiment. Preliminary data obtained with the thicker film will be reported here. Two independent computer-based data acquisition systems were used to obtain the data which were stored in a multi-parameter mode so that analysis could be done under different conditions after the experiment was finished. The differential cross section was measured simultaneously at 11 laboratory angles (0°, ± 12°, ± 24°, ± 36°, ± 48° and ± 60°) using ΔE-E solid state detector telescopes in an evacuated scattering chamber. The data are in better agreement with the Arndt evaluation than the ENDF/B-VI and ENDF/B-V evaluations.

Author Information

Bateman, FB
National Institute of Standards & Technology, Gaithersburg, MD
Boukharouba, N
Ohio University, Athens, OH
Brient, CE
Ohio University, Athens, OH
Carlson, AD
National Institute of Standards & Technology, Gaithersburg, MD
Grimes, SM
Ohio University, Athens, OH
Haight, RC
Los Alamos National Laboratory, Los Alamos, NM
Massey, TN
Ohio University, Athens, OH
Wasson, OA
National Institute of Standards & Technology, Gaithersburg, MD
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Developed by Committee: E10
Pages: 431–438
DOI: 10.1520/STP13626S
ISBN-EB: 978-0-8031-5450-6
ISBN-13: 978-0-8031-2884-2