| Authors: |
Dinh NN; Faculty of Physics, VNU University of Science, Hanoi, 100000, Viet Nam; Vietnam National University, Hanoi, 100000, Viet Nam., Bach NC; Faculty of Physics, VNU University of Science, Hanoi, 100000, Viet Nam; Vietnam National University, Hanoi, 100000, Viet Nam., Bach TV; Phan Boi Chau High School for the Gifted, Nghean City, 460000, Viet Nam., Nguyet Chi DT; VNU-HUS, High School for the Gifted, Hanoi, 100000, Viet Nam., Cuong DD; Vietnam National University, Hanoi, 100000, Viet Nam; Thai Nguyen University of Technology, Thainguyen City, 250000, Viet Nam., Dat NT; Faculty of Physics, VNU University of Science, Hanoi, 100000, Viet Nam; Vietnam National University, Hanoi, 100000, Viet Nam., Kien DT; Faculty of Physics, VNU University of Science, Hanoi, 100000, Viet Nam; Vietnam National University, Hanoi, 100000, Viet Nam., Phuong NT; Vietnam National University, Hanoi, 100000, Viet Nam., Thao LQ; Faculty of Physics, VNU University of Science, Hanoi, 100000, Viet Nam; Vietnam National University, Hanoi, 100000, Viet Nam. Electronic address: thaolq@hus.edu.vn., Thien ND; Faculty of Physics, VNU University of Science, Hanoi, 100000, Viet Nam; Vietnam National University, Hanoi, 100000, Viet Nam., Thuy DTT; Faculty of Physics, VNU University of Science, Hanoi, 100000, Viet Nam; Vietnam National University, Hanoi, 100000, Viet Nam., Minh Thuy LT; Faculty of Physics, VNU University of Science, Hanoi, 100000, Viet Nam; Vietnam National University, Hanoi, 100000, Viet Nam. |