G. Eliseev

The performance of a total absorption spectrometer up to energies of 60 GeV

Abstract The response of a sampling total absorption counter (STAC) to protons, neutrons, pions, and electrons with incident energies up to 60 GeV is described. A good linearity was observed, and for protons a resolution of ±6% at 60 GeV/ c could be achieved. The absolute fwhm rises slowly with energy from 4.5 GeV/ c at 10 GeV/ c to 7.2 GeV/ c at 60 GeV/ c . The fraction of the energy deposited in the scintillator by incident π + and e + is on the average 9% and 50% higher than that deposited by protons.

Neutron-proton elastic scattering from 10 to 70 GeV/c

Abstract The neutron-proton elastic differential cross section has been measured for incident momenta between 10 and 70 GeV/c and for values of the momentum transfer squared between 0.1 and 2.8 (GeV/c) 2 . The forward peak and the break at about ∣ t ∣ = 1 (GeV/ c ) 2 are very similar to corresponding pp data.

Elastic backward scattering of negative pions on neutrons at 23 and 40 GeV/c

Abstract The backward elastic scattering reaction π − p → p π − at momenta 25 and 38 GeV/ c have been measured using a magnetic spectrometer with hybrid chambers. The experimental data on the dependence of the cross section d σ /d u on the momentum transfer u as well as the energy dependence d σ /d u at u = 0 are given.

Neutron-proton charge-exchange scattering from 22 to 65 GeV/c

Abstract The differential cross sections for neutron-proton elastic charge-exchange scattering have been measured with a two-arm technique for incident neutron momenta between 22 and 65 GeV/ c and for values of the momentum transfer squared between 0.002 and 0.8 (GeV/ c ) 2 . The sharp forward peak observed previously at lower energies is also present at momenta up to 65 GeV/ c ; however the s dependence of the cross section is slowing down.

Diffraction dissociation of neutrons into (pπ−) on protons in the momentum range 35 to 65 GeV/c☆

The diffraction dissociation reaction n + p → (pπ−) + p was studied at the Serpukhov accelerator neutron beam in the momentum range 35–65 GeV/c in an electronics experiment. The differential cross sections of the reaction are analysed and presented in the five-dimensional phase space (pn, m∗, t, cosθ∗, φ∗). The backward peak observed in the distribution over if cosθin GJ ∗ in the Gottfried-Jackson frame of if(pπ) is interpreted as a baryon-exchange effect. The angular distribution of the (pπ−) system is compared with Deck-type models.

The neutron total cross section measurements on protons and nuclei in the energy range of 28–54 GEV

Abstract The results of the total cross section measurements of neutrons on protons, deuterons and nuclei C, O, Al, Cu, Sn, Pb in the energy range of 28–54 GeV are reported.

Backward charge exchange π− + p → πo + n reaction in the momentum range 1.55 – 3.8 GeV/c

The results of measurements on pion-nucleon charge exchange scattering at cosθ∗ = −0.99 ± 0.01 in the momentum range 1.55 to 3.8 GeV/c are reported.