Threshold energy for sub-barrier fusion hindrance phenomenon V. V. Sargsyan, G. G. Adamian, N. V. Antonenko, W. Scheid and H. Q. Zhang Eur. Phys. J. A, 49 2 (2013) 19 Published online: 08 February 2013 DOI: 10.1140/epja/i2013-13019-6