التفاصيل البيبلوغرافية
| العنوان: |
Luminescence Properties of Impurity-Doped Zinc Oxide Phosphor for Novel Neutron Detection. |
| المؤلفون: |
Hidehito Nanto, Mizuha Sato, Yuka Miyamoto, Kazuki Hirasawa, Yoshinori Takei, Takayuki Yanagida, Tatsuya Nakamura, Masaki Katagiri |
| المصدر: |
Sensors & Materials; 2016, Vol. 28 Issue 8, p905-916, 12p |
| مصطلحات موضوعية: |
PHOSPHORIMETRY, LUMINESCENCE measurement, ZINC oxide synthesis, ELECTRIC properties of zinc sulfide, NEUTRON counters |
| مستخلص: |
A neutron detection sheet composed of Ag-doped zinc sulfide (ZnS) as a scintillator and 6LiF as a neutron converter has been conventionally used for neutron detection, and as an imaging detector using the photon counting method, because of its high luminescence rate for neutrons. However, the weak point in a Ag-doped ZnS scintillator is the slow component of its lifetime. Thus, we began to investigate other II-VI compound phosphors without the slow component of its lifetime for neutron detectors using the photon counting method. In this study, Cu-, In-, Al-, and Gaimpurity-doped ZnO phosphors without the slow component of lifetime for neutron detectors at a high counting rate have been fabricated using a spark plasma sintering method. It was found that Ga-doped ZnO exhibited the highest intensity of luminescence at a wavelength of 383 nm. The intensity of the 383 nm luminescence due to exciton emission with a lifetime of about 4 ns was comparable to that of the Ag-doped ZnS phosphor with a lifetime of about 220 ns, indicating that the Ga-doped ZnO phosphor could be used as a promising phosphor material for a neutron image sensor. It was also found that the luminescence intensity of the Ga-doped ZnO phosphor samples did not decrease when B2O3 was added as a neutron-alpha (n, alpha) converter. It was confirmed that a Ga-doped ZnO scintillator with B2O3 converter responds to the neutron beam emitted by the Japan Research Reactor-3 (JRR-3). [ABSTRACT FROM AUTHOR] |
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