Thickness measurement of the stripper foil using modified nuclear-analytical method - V. I. Soroka; V. V. Ostashko; V. A. Onyshchuk; E. M. Mozhzhukhin; M. V. Artsymovych; D. A. Kushpii; I. V. Posmitiukh; A. F. Sharov; A. A. Shevchuk (Nuclear physics and atomic energy, 2015)