The disappearance of transverse collective flow for ⁴⁰Ar{+}²⁷$Al collisions is studied with an improved Boltzmann-Uehling-Uhlenbeck equation. For collisions at impact parameters less than 3 fm, the predicted energy of balance, ${E}bal$, is very sensitive to the in-medium nucleon-nucleon cross section, but insensitive to the equation of state. At larger impact-parameter collisions, the sensitivities to both the in-medium nucleon-nucleon cross section and the equation of state at subnuclear density becomes comparable. Comparisions with experimental data indicate an in-medium nucleon-nucleon cross section in the range of 25--45 mb.
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Hong Ming Xu (1991) studied this question.
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