Probing scattering wave functions with nucleus-nucleus bremsstrahlung

Nucleus-nucleus bremsstrahlung is explored in the α+α system with four different models: (i) a ten-channel microscopic model with monopolar distortion of the α-clusters, (ii) the elastic channel restriction of this microscopic model, (iii) a deep-potential model, and (iv) an equivalent shallow-potential model derived from supersymmetry. The α+α phase shifts in the different models are very close to each other and to experiment. Different centre-of-mass and laboratory bremsstrahlung cross sections are calculated with an accurate treatment of Coulomb convergence. The single-channel results are close to those of the multichannel calculation. The shallow potential provides rather different cross sections from the other models. Experimental conditions exist where one should easily discriminate between the deep-potential and microscopic models. A confirmation of the microscopic sections under these conditions would provide evidence for antisymmetrization effects in scattering wave functions. (orig.)