Neutron-Proton Scattering at 90 Mev

Abstract

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Cross Sections for Products of 90-Mev Neutrons on Carbon

“…For simplicity~ the Be7 production rate was computed with no decay corrections (before end of bombardment) 9 since the error involved was negligible in 13 hours -40-intermittent bombardmento Using the ell beta .transzds.sion data from The cloud .chamber used was of the rubber diaphragm type, with a diameter of 22 inches, and a depth of four incheso The chamber was placed horizontally in a ve_z. :tical magnetic field of 21 3 ~00 gauss produced by a peak current of 4ll000 amperes pulsed through a.---pair at;.…”

“…-31-' S~me 'sample calculations will now be Jr esentedo Equation (9) was usuaitly modified"before actilal use in a calculation because the ~2 and ell co~ting rates were usually employed as follows g The Bl2…”

Mesons

“…The above results appear to have an important bearing on the theory of the meson, for it has been shown by Brueckner (1949) that the experimental curves for the distribution in angle and energy of the emitted mesons can be best accounted for in terms of a pseudo-scalar theory. I n contrast with the observations, scalar theory predicts a strong anisotropy in the angular distribution.…”

Pion Production by Neutrons on Helium

“…The events were measured on reprojection apparatus similar to that described by Brueckner et al 10 and shown in …”