1. Natural Resources Canada, CanmetENERGY—Devon, One Oil Patch Drive, Devon, Alberta T9G 1A8, Canada
2. Departamento
de Física, Universidade Estadual de Maringá, Avenue Colombo 5790, Maringá, Paraná 87020-900, Brazil
3. National Research Council Canada, Energy, Mining and Environment Research Center, 4250 Wesbrook Mall, Vancouver, British Columbia V6T 1W5, Canada
4. National Research Council Canada, Energy, Mining and Environment Research Center, 1200 Montreal Road, Building M-9, Ottawa, Ontario K1A 0R6, Canada