Ultraviolet–near infrared luminescence characteristics of Nd:La2Be2O5 single crystals for near-infrared emitting scintillators

IF 3.3 3区物理与天体物理 Q2 OPTICS Journal of Luminescence Pub Date : 2024-10-11 DOI:10.1016/j.jlumin.2024.120938

Kensei Ichiba, Takumi Kato, Daisuke Nakauchi, Noriaki Kawaguchi, Takayuki Yanagida

引用次数: 0

Abstract

The fabrication of 0.1, 0.5, 1.0, and 5.0 % Nd:La₂Be₂O₅ single crystals was carried out by the floating zone method, and photoluminescence (PL) and scintillation properties were measured. The PL spectra showed some emission lines which was derived from the 4f-4f transitions of Nd³⁺ ions. The scintillation spectra showed a broad emission band originating from some lattice defect and the emission lines due to the 4f–4f transitions of Nd³⁺ ions. The afterglow levels of Nd:La₂Be₂O₅ were 192.3 (0.1 % Nd), 205.9 (0.5 % Nd), 228.2 (1.0 % Nd), and 315.4 (5.0 % Nd) ppm. The 1.0 % Nd:La₂Be₂O₅ showed the highest intensity in the dose-rate response functions among the samples, and a lower detection limit was 0.003 Gy/h.

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用于近红外发射闪烁体的 Nd:La2Be2O5 单晶体的紫外线-近红外发光特性

采用浮区法制备了 0.1%、0.5%、1.0% 和 5.0% Nd:La2Be2O5 单晶，并测量了其光致发光（PL）和闪烁特性。光致发光光谱显示出一些发射线，这些发射线来自 Nd3+ 离子的 4f-4f 转变。闪烁光谱显示了一个宽发射带，该发射带源于一些晶格缺陷和 Nd3+ 离子的 4f-4f 转变发射线。Nd:La2Be2O5 的余辉水平分别为 192.3（0.1 % Nd）、205.9（0.5 % Nd）、228.2（1.0 % Nd）和 315.4（5.0 % Nd）ppm。在所有样品中，1.0% Nd:La2Be2O5 的剂量率响应函数强度最高，检测下限为 0.003 Gy/h。

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.