First measurement of the cross-section ratioR dp(0) in charge-exchange (np) reactions on H2/D2 at 0o andT n = 1 GeV Dubna “Delta-Sigma experiment”

Abstract

The first results of the measurement at 0 ~ of the cross-section ratio Rdp ----0.50 =[= 0.02 in charge-exchange (np) reaction on H2/D2 targets at the neutron beam kinetic energie 1.0GeV are presented. As a result the value of the ratio of non spin-flip to spin-flip _nf/fl contribution in np --* pn charge-exchange at 0 ~ ,np~p, = 0.33 2= 0.03 was obtained.