CHIEN-YI CHEN2026-10-162026-10-162010-09-01Pure ID: 14989120Pure UUID: 423d24d1-96e5-41b6-baf2-8e2fb6c3731010.1016/j.apradiso.2010.03.017https://www.scopus.com/pages/publications/79952202113https://scholars.csmu.edu.tw/handle/123456789/32184This study evaluated spatial Φ 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 Φ th value at the isocenter of the water was 1.03×10 6ncm -2/Gy-X, and the maximum quantity of Φ th appeared at the water surface along the z-axis, 3.99×10 6ncm -2/Gy-X. The thermal neutron dose at isocenter of the water phantom occupied approximately 0.151% of the whole photo and neutron dose.6enjournal article