... SPECTROSCOPY USING MCNP TRUONG THI HONG LOAN, DANG NGUYEN PHUONG, DO PHAM HUU PHONG, AND TRAN AI KHANH Faculty of Physics, University of Natural Sciences, Vietnam National University, Ho Chi Minh ... Carlo N-particle Transport Code System, LA-13709-M (June 2001) [2] Truong thi Hong Loan, Tran Ai Khanh, Dang Nguyen Phuong, Do Pham Huu Phong, Efficiency calibration for HPGe detector with voluminous ... beta decay ACKNOWLEDGMENTS The author is indebted to Pierre Darriulat (VATLY, INST) and Nguyen Anh Ky (IOP) for useful discussions The deep thanks is extended to VATLY members for their cooperation...