Investigations on the electric-dipole allowed 4f25d → 4f3 broadband emission of Nd3+-doped 20Al(PO3)3-80LiF glass for potential VUV scintillator application
Investigations on the electric-dipole allowed 4f25d → 4f3 broadband emission of Nd3+-doped 20Al(PO3)3-80LiF glass for potential VUV scintillator application
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对电偶极子的研究允许 Nd3+ 掺杂 20Al(PO3)3-80LiF 玻璃实现 4f25d → 4f3 宽带发射，用于潜在的 VUV 闪烁体应用
DOI：
10.1016/j.jallcom.2020.158096
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发表时间：
2021
影响因子：
6.2
通讯作者：
Cadatal-Raduban Marilou
中科院分区：
文献类型：
--
作者：
Empizo Melvin John F.;Minami Yuki;Yamanoi Kohei;Shimizu Toshihiko;Yoshimura Masashi;Sarukura Nobuhiko;Murata Takahiro;Yamaji Akihiro;Yoshikawa Akira;Guzik Malgorzata;Guyot Yannick;Boulon Georges;Cadatal-Raduban Marilou
本文报道了掺钕APLF玻璃[20 Al（PO_3）_3- 80 LiF ~（+x）Nd_（3+），x= 0.5- 2.0mol%]的吸收和发射性质，由于它们的4f ~（25）d组态间跃迁尚未被研究过，所以它们是潜在的真空紫外（VUV）闪烁体材料。Nd 3+掺杂的APLF玻璃在真空紫外到近红外（NIR）区域具有吸收和发射峰，对应于Nd 3+离子不同的组态间4f 25 d和组态内4f 3跃迁。详细的吸收和发射光谱的分析表明，Nd 3+掺杂的玻璃具有无序的结构和低对称性，从非晶材料的预期。然而，这些玻璃最重要的特征是它们的电偶极允许4f 25 d → 4f 3（4 I9/2）宽带发射，在相反宇称的两种配置之间，大约187 nm（VUV），其~ 5.0 ns的衰减时间比已知的快3 +-掺杂闪烁体。在室温（RT）下，位于192 nm附近的吸收边与该VUV发射重叠，表明自吸收主要限制发射强度。这种重叠可能通过在低温下工作和以更高（>2.0摩尔%）浓度掺杂而最小化。尽管存在自吸收，但从4f 25 d激发态的快速发射衰减时间使得Nd 3+掺杂的APLF玻璃有希望成为用于高计数率快中子探测的新的VUV闪烁体材料。
We report the absorption and emission properties of neodymium (Nd3+)-doped APLF glasses [20Al(PO3)3-80LiF +xNdF3,x= 0.5–2.0 mol%] as potential vacuum ultraviolet (VUV) scintillator materials due to their interconfigurational 4f25d transitions which have not yet been investigated. The Nd3+-doped APLF glasses exhibit absorption and emission peaks from the VUV to the near-infrared (NIR) regions which correspond to the different interconfigurational 4f25d and intraconfigurational 4f3transitions of Nd3+ions. Detailed analysis of the absorption and emission spectra reveals that the Nd3+-doped glass has a disordered structure and low symmetry, as expected from amorphous materials. However, the most important feature of these glasses is their electric-dipole allowed 4f25d → 4f3(4I9/2) broadband emissions, between two configurations of opposite parity, around 187 nm (VUV) whose ~ 5.0 ns decay times are faster than known Nd3+-doped scintillators. At room temperature (RT), the absorption edge located around 192 nm overlaps with this VUV emission indicating that self-absorption primarily limits the emission intensity. This overlap could potentially be minimized by working at low temperatures and doping with higher (>2.0 mol%) concentrations. Despite the presence of self-absorption, the fast emission decay times from the 4f25d excited state make the Nd3+-doped APLF glasses promising new VUV scintillator materials for high-counting-rate fast neutron detection.
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