Crystal growth and optical properties of Ce:(La,Gd)2Ge2O7 grown by the floating zone method

• Published in: Journal of crystal growth Vol. 393; pp. 142 - 144
• Main Authors: Kurosawa, Shunsuke, Shishido, Toetsu, Sugawara, Takamasa, Yubuta, Kunio, Jan, Pejchal, Suzuki, Akira, Yokota, Yuui, Shoji, Yasuhiro, Kamada, Kei, Yoshikawa, Akira
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.05.2014; Elsevier
• Subjects: A2. Floating zone technique; B2. Scintillator materials; B3. Scintillators; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Growth from melts; zone melting and refining; Materials science; Methods of crystal growth; physics of crystal growth; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Optical property; Physics; Pyrochlore; Pyrogermanate; Pyrosillicate; Pyrochlore; B3. Scintillators; A2. Floating zone technique; B2. Scintillator materials; Pyrosillicate; Optical property; Pyrogermanate; Crystal growth; Scintillations; pH value; Gadolinium Silicates; Lutetium silicates; Luminescence; Cerium; Gadolinium; Floating zone; Quenching; Optical properties; Crystal growth from melts
• ISSN: 0022-0248; 1873-5002
• DOI: 10.1016/j.jcrysgro.2013.12.038

Some pyrosilicate scintillators such as Ce:Gd2Si2O7 and Ce:Lu2Si2O7 have a good light output, and especially Ce:(Gd,La)2Si2O7 has an excellent light output of over 36,000ph/MeV. In order to search novel scintilators, we have developed a pyrogermanate-based scintillation material (Ce0.01,Gd0.90,La0.09)2Ge2O7 using the floating zone method. Although the light output was decreased due to quenching, 5d–4f transition of Ce3+ was observed around 480nm in photo- and radio-luminescence spectra. This emission wavelength was longer than that of (Ce0.01,Gd0.90,La0.09)2Si2O7 with an emission wavelength of 390nm.