用双光子电离探测技术研究奇宇称的Eu原子光谱

徐亚伟; 沈礼; 戴长建

doi:10.3788/fgxb20194001.0052

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用双光子电离探测技术研究奇宇称的Eu原子光谱

材料合成及性能 | 更新时间：2020-08-12

- 用双光子电离探测技术研究奇宇称的Eu原子光谱
- Study of Odd-parity States of Eu Atom with Two-photon Ionization Detection Technique
- 发光学报 2019年40卷第1期页码：52-57
- 作者机构：
  
  1. 天津理工大学理学院天津,300384
  2. 天津理工大学显示技术与光电器件教育部重点实验室天津,300384
- 作者简介：
- 基金信息：
  
  国家自然科学基金（11174218）资助项目()
- DOI：10.3788/fgxb20194001.0052
  中图分类号： O433.5+9;O562.3+1
- 收稿日期：2018-03-22，
  
  修回日期：2018-06-21，
  
  网络出版日期：2018-07-06，
  
  纸质出版日期：2019-01-05
- 稿件说明：
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徐亚伟, 沈礼, 戴长建. 用双光子电离探测技术研究奇宇称的Eu原子光谱[J]. 发光学报, 2019,40(1): 52-57

XU Ya-wei, SHEN Li, DAI Chang-jian. Study of Odd-parity States of Eu Atom with Two-photon Ionization Detection Technique[J]. Chinese Journal of Luminescence, 2019,40(1): 52-57
徐亚伟, 沈礼, 戴长建. 用双光子电离探测技术研究奇宇称的Eu原子光谱[J]. 发光学报, 2019,40(1): 52-57 DOI： 10.3788/fgxb20194001.0052.

XU Ya-wei, SHEN Li, DAI Chang-jian. Study of Odd-parity States of Eu Atom with Two-photon Ionization Detection Technique[J]. Chinese Journal of Luminescence, 2019,40(1): 52-57 DOI： 10.3788/fgxb20194001.0052.

摘要

利用双光子电离探测技术系统地研究了Eu原子的奇宇称态的光谱。双光子电离探测技术利用两步激发获得Eu原子奇宇称态的光谱:首先将第一步激光的波长固定，而最后一步激光的波长在35 500~35 650 cm

-1

，36 200~36 600 cm

-1

和46 650~46 950 cm

-1

三个能域范围扫描，对处于奇宇称激发态的Eu原子进行双光子电离，以实现探测其光谱信息的目的。本文系统地研究了35 500~35 650 cm

-1

，36 200~36 600 cm

-1

和46 650~46 950 cm

-1

能域内的光谱特征，报道了这些能域内具有特殊寿命的高激发态。通过对采用3种不同的激发路径获得的高激发态的光谱进行拟合，不仅获得了这些高激发态能级位置、线宽和线型的信息，而且还观察到奇宇称态光谱中的

反转现象。此外，通过分析所获得的3张奇宇称态的光谱，首次证明了4f壳层的电子被激发的可能性，该结果为检测新量子理论提供了可靠的实验依据。

Abstract

The spectra of odd-parity states of Eu atom are studied systematically with two-photon ionization detection technique. The two-photon ionization detection technique is utilized to obtain the spectra of odd-parity states with the two-step excitation:the wavelength of the first step laser is fixed

while that of the last-step laser is scanned around the region of 35 500-35 650 cm

-1

36 200-36 600 cm

-1

and 46 650-46 950 cm

-1

respectively. The characteristics of spectra in the energy region of 35 500-35 650 cm

-1

36 200-36 600 cm

-1

and 46 650-46 950 cm

-1

are investigated

demonstrating the special lifetime of highly excited states within those energy regions. In this paper

three different excitation pathways are used

not only the energy levels

line width and line shape are obtained

but also the

-reversal phenomenon is observed in the odd-parity states spectra. Besides

by analyzing the odd-parity states spectra of Eu atom

it is demonstrated that the possibility of 4f electrons are excited for the first time.

关键词

Keywords

references

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