Distribution of spatial photoneutrons inside a 70kg water phantom via neutron activation analysis.
This study evaluated spatial Phi(th) inside a 70kg water phantom using the NAA method. Fifty indium foils were placed inside the water phantom and exposed under 15MV LINAC for 2.5min to yield the 10Gy X-ray dose. The Phi(th) value at the isocenter of the water was 1.03x10(6)ncm(-2)/Gy-X, and the maximum quantity of Phi(th) appeared at the water surface along the z-axis, 3.99x10(6)ncm(-2)/Gy-X. The thermal neutron dose at isocenter of the water phantom occupied approximately 0.151% of the whole photo and neutron dose.
Liu
Mu-Tai
MT
Department of Radiation Oncology, Changhua Christian Hospital, Changhua, Taiwan, Republic of China.
Huang
Sing-Sheng
SS
Liu
Wen-Shan
WS
Yea
Da-Ming
DM
Pan
Lung-Kwang
LK
Chen
Chien-Yi
CY
D000465:Algorithms; D009501:Neutron Activation Analysis / Q000295:instrumentation* / Q000706:statistics & numerical data*; D009502:Neutrons; D019047:Phantoms, Imaging; D017785:Photons; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*; D012542:Scattering, Radiation; D014867:Water
D014867:Water