Neutron-Deuteron Elastic Scattering at 100-300 MeV

Astronomy and Astrophysics – Astrophysics

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Scientific paper

The differential cross section for neutron-deuteron elastic scattering was measured at six angles over the center-of-mass angular range 65^circ - 130^circ and incident neutron energies 100-300 MeV at the LANSCE/WNR facility of the Los Alamos National Laboratory. Witala et al.(H. Witala et al.), Phys. Rev. Lett. 81, 1183 (1998) have suggested that the differential cross section for nucleon-deuteron scattering at large angles may be sensitive to the presence of a three-nucleon force. In the present experiment, a liquid deuterium target was exposed to the pulsed neutron beam, with incident neutron energy determined by time of flight. The scattered neutrons, detected by a horizontal array of plastic scintillator bars, and the recoil deuterons, detected by Δ E-E (plastic scintillator -- CsI) telescopes, were observed in coincidence. The resulting angular distributions for several incident neutron energies are compared with theoretical predictions and previous measurements in both nd and pd systems.

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