Positron creation probabilities in low-energy heavy-ion collisions Andrey I. Bondarev, Ilya I. Tupitsyn, Ilia A. Maltsev, Yury S. Kozhedub and Günter Plunien Eur. Phys. J. D, 69 4 (2015) 110 Published online: 16 April 2015 DOI: 10.1140/epjd/e2015-50783-6