The VUV excitation spectrum under 457nm of M_2SiO_4: Tm~(3+) (M=Mg, Sr, Ba) shows two peaks at about 170nm and 190nm and a broad excitation band from 211nm to 300nm.
监测457nm时，M_2SiO_4(M=Mg,Sr,Ba)：Tm~(3+)的真空紫外激发谱中，存在两个位于170nm，190nm附近的激发峰和一个位于211nm-300nm附近的激发带。
参考来源 - M·2,447,543篇论文数据，部分数据来源于NoteExpress
三、四准粒子激发带的实验分析结果，与之有明显不符。
Systema-tical discrepancy exists between the experimental result and the quasi-particle prediction.
首先介绍了SLR脉冲设计思想，然后基于密度矩阵理论，应用计算机模拟方法对所设计脉冲的激发带宽进行模拟。
In this article, we present a design method of the SLR pulse. Subsequently, based on density-matrix theory, computer simulations are used to show the excitation profiles of the designed SLR pulses.
本文提出的旋转回波脉冲序列具有激发带宽适中，实验参数调整简单的特点，可广泛应用于固体样品的核磁共振谱测量中。
A pulse sequence, namely rotary echo, with modest excitation bandwidth and mere adjustment of the experimental parameters is proposed in the present article.
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