1. Research and Development Center for Radiation Technology, Vietnam Atomic Energy Institute, 202A Street 11, Linh Xuan Ward, Thu Duc District, Ho Chi Minh City 700000, Vietnam
2. Hochiminh City University of Natural Resources and Environment, 263B Le Van Sy Street, Ho Chi Minh City 700000, Vietnam
3. College of Sciences, Hue University, Hue 530000, Vietnam