Italienisch—Albanisch

Total cross sections, elastic scattering observables and direct reconstruction of scattering matrix in np Interactions between 0.8 and 1.1 GeV at SATURNE II

“…At SATURNE II, a free neutron beam was first built for the IKAR experiment [5,6] and later for the NN program [2].The characteristics of both beain~ are similar. Vector-polarized deuterons were broken up on a 20 cm thick Be target.…”

“…[12], quasielastic Aoo, o data from ref. [7] and the IKAR results at small angles [5,6] o --0.794 GeV, SATURNE II [9]; + --0.788 GeV, LAMPF [30]; • --0.788 GeV, LAMPF [33]; solid line --Saclay-Geneva PSA 1993 including the present points; dashed line -ref. [31]; dot-dashed line --ref.…”

“…Measurements at small angles, however, have been scarce. At SATURNE II, the small angle elastic np differential cross section at 378,481,532, 582, 633, 683, 708, 784, 834, 884, 934, 985, 1085 and l135MeV was measured by Saclay and Gatchina groups [5], resulting in 585 experimental points. In this experiment, neutrons were scattered at small angles inside a high-pressure drift chamber IKAR which measured the slow recoil proton angle and path length in the gas.…”

“…In this experiment, neutrons were scattered at small angles inside a high-pressure drift chamber IKAR which measured the slow recoil proton angle and path length in the gas. The same experimental set-up completed by two large neutron counters was used to determine the np analyzing power at 0.633, 0.784, 0.834, 0.934 and 0.985 GeV [5,6]. Most of spin dependent observables were measured by the "NUCLEON-NUCLEON GROUP" (NN), either in quasielastic [7,8,9], or in elastic [10][11][12][13][14][15] np scattering (90 and 1646 data points, respectively).…”