1. Coordination in Science and Technology (CCCT), Federal University of Maranhão (UFMA), Campus Bacanga, 65080-805 Sao Luís, MA, Brazil
2. Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Moscow, Russia
3. Department of Physics, Federal University of Maranhão (UFMA), Campus Bacanga, 65085-580 São Luís, MA, Brazil
4. Department of Physics and Chemistry, Federal University of Espirito Santo (UFES), 29060-900 Vitoria, ES, Brazil