Multiplicity dependence of azimuthal distributions for ${}_{}{}^{36}{}_{}{}^{}\mathrm{Ar}$${+}^{197}$Au collisions at E/A=35 MeV

Collisions between ${}_{}{}^{36}{}_{}{}^{}\mathrm{Ar}$ projectile and ${}_{}{}^{197}{}_{}{}^{}\mathrm{Au}$ target nuclei at E/A=35 MeV have been studied with the Michigan State University Miniball, a 4π phoswich array with a low detection threshold. Azimuthal distributions of charged particles with respect to the reaction plane are determined via the transverse-momentum-tensor method. Dependence on the kinetic energy of the emitted particles, the collision geometry, and the associated charged particle multiplicity is investigated. Corrections for the intrinsic resolution of the experimental reaction plane determination are applied. Scaling implied by the coalescence model is explored and the data are compared to the results of microscopic calculations within the Boltzmann-Uehling-Uhlenbeck theory.