Velocity Dependence of Rotationally Inelastic Cross-Sections

State - to - state cross sections for rotationally inelastic

As a further theoretical study of the collision-induced quantum interference on rotational energy transfer in an atom-diatom system, the differential interference angles for singlet-triplet mixed states of Na2 system in collision with He were calculated based on the first-Born approximation of time-dependent perturbation theory, taking into account the anisotropic Lennard-Jones interaction pote...

Energy dependence of nucleon-nucleon inelastic total cross-sections

Total inelastic pp cross-sections are reconstructed for laboratory kinetic energies ranging from 0.3 to 400 GeV. They are obtained by fitting together the sum of total cross-sections for exclusive inelastic channels, the sum of topological cross-sections and the results for independent « direct » measurements. The inelastic np cross-sections are reconstructed in the energy range below 4.2 GeV u...

Ab initio potential-energy surface and rotationally inelastic integral cross sections of the Ar-CH4 complex

State-to-state resolved differential cross sections for rotationally inelastic scattering of ND3 with He.

State-to-state differential cross sections are reported for rotationally inelastic scattering of fully state-selected ND3 (j(k)(±) = 1(1)(-)) with He. Experimental measurements are compared with full close-coupling quantum-mechanical scattering calculations that used an ab initio potential energy surface. Results are presented for final states up to j'(k')(±) = 7(7)(-) at a mean collision energ...

The Froissart bound for inelastic cross-sections

We prove that while the total cross-section is bounded by (π/mπ) ln 2 s, where s is the square of the c.m. energy and mπ the mass of the pion, the total inelastic cross-section is bounded by (1/4)(π/mπ) ln 2 s, which is 4 times smaller. We discuss the implications of this result on the total cross-section itself. The Froissart bound [1], proved later from local massive field theory and unitarit...