2Lalonde R. The effect of neutron-moderating materials in high-energy linera accelerator mazes. Phys Med Biol, 1997,42: 335-344.
3McGinley PH, Miner MS, Mitchum ML. A method for calculating the dose due to capture gamma rays in accelerator maze. Phys Med Biol,1995,40:1467-1473.
4Kase KR, Mao XS, Nelson WR, et al. Neutron fluence and energy spectra around the varian clinic 2100C/2300C medical accelerator. Health Phys,1998,74:38-47.
5National Council on Radiation Protection and Measurements. Report No.79. Neutron contamination from medical electron accelerators. Bethesda MD:National Council on Radiation Protection and Measurements, 1984.
6Mao XS, Kase KR, Liu JC, et al. Neutron sources in the Varian Clinac 2100C/2300C medical accelerator calculated by EGS4 code. Health Phys, 1997,74: 524-529.
7McGinley PH. Photoneutron fields in medical accelerator rooms with primary barriers constructed of concrete and metals. Health Phys, 1992,63:698-701.
8Morikawa K, Ishimatsu K. Leakage radiations in a medical electron accelerator facility-measurement of neutrons and comparison with calculation. Radioisotopes, 1990,39: 37-44.
9Sanchez F, Madurga G, Arrans R. Neutron measurements around an 18MV linac. Radiother Oncol, 1989,15: 259-268.
10Tosi G,Torresin A, Agosteo S, et al. Neutron measurements around medical electron accelerators by active and passive detection techniques. Med Phys, 1991,18: 54-60.