Nuclear fusion between heavy ions by the gamma-ray spectroscopy method - Gomes, P R S; Penna, T J P; Liguori Neto, Raphael; Acquadro Quacchia, Juan Carlos; Tenreiro, C; Freitas, P A B; Crema, Edilson; Carlin Filho, Nelson; Coimbra, M M (Radiation Physics: Proceedings of the Fourth International Symposium, Brazil, 1988, 1989)