Theoretical analysis of collisional shift and broadening of antiprotonic helium spectral linesстатья
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Аннотация:Effect of medium density on shift and broadening of ( pˉHe+ ) spectral lines is considered in the framework of binary-collision approximation with an effective ( pˉHe+ )–He potential including the long-range attraction and short-range repulsion. Quantum calculations of the scattering phase shifts at reasonable values of the potential parameters allow to explain the main features of the observed density effect on the shape of ( pˉHe+ ) spectral lines in low-temperature helium.