High-energy X-ray detection capabilities of Hf-loaded plastic scintillators synthesized by sol–gel method. - Kagami, Kei; Koshimizu, Masanori; Fujimoto, Yutaka; Kishimoto, Syunji; Haruki, Rie; Nishikido, Fumihiko; Asai, Keisuke (Journal of Materials Science: Materials in Electronics, 2020)