三重态里德伯态zni原子光谱的研究

Q4 Physics and Astronomy
N. I. Pogrebnyak, S. Dyubko, M. P. Perepechai, A. Kutsenko, Crimean Astrophysical Observatory
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All three radiations are reduced to the zone of interaction with the laser and the microwave radiation, which is located between the plates of the ionization cell, where the pulsed electric field is created. The excited Rydberg atoms are recorded with the field ionization procedure. The beam of neutral atoms is created by an effusion cell under the vacuum conditions, the residual pressure does not exceed 10-5 mm Hg. A pulsed electric field of some certain intensity results inionization of atoms excited by microwave radiation and in acceleration of electrons, which have appeared in the direction of the secondary electron multiplier, though being insufficient for ionization of atoms excited only by the laser radiation and which are initial for interaction with microwaves. By scanning the microwave radiation frequency with the given step and measuring the signal intensity of the secondary electron multiplier, the excitation spectrum of the atoms under study can be obtained. 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引用次数: 0

摘要

目的:本工作旨在研究三重态预电离-里德堡态中的锌原子。主要用光谱学方法研究了在封闭壳层外具有两个电子的原子的能级。然而,仅仅使用微波光谱来测量两个里德堡态之间的跃迁频率就可以将测量的精度提高到两个或更多个数量级。设计/方法/方法:使用一行三个染料激光器将锌原子激发成具有预定量子数集的三重里德堡态。其中前两个的辐射在非线性晶体中被转换为二次谐波。染料激光器由YAG:ND3+激光器的二次谐波辐射激发。所有三种辐射都被减少到与激光和微波辐射相互作用的区域,该区域位于电离室的板之间,在那里产生脉冲电场。用场电离方法记录了激发的里德伯原子。中性原子束由渗出池在真空条件下产生,残余压力不超过10-5毫米汞柱。某种强度的脉冲电场导致由微波辐射激发的原子的电离和电子的加速,这些电子已经出现在二次电子倍增器的方向上,尽管不足以电离仅由激光辐射激发的并且是与微波相互作用的初始原子。通过以给定的步长扫描微波辐射频率,并测量二次电子倍增器的信号强度,可以获得所研究原子的激发光谱。研究结果:使用创建的激光微波光谱仪→D、 F→F和F→测量了锌原子的三重态里德伯态之间的G跃迁。根据对跃迁频率的分析,通过Ritz公式获得了锌原子D、F和G态的量子缺陷分解常数。结论:F的频率→D、 F→F和F→测量了锌原子的三重态里德堡态之间的G跃迁,与光谱法进行的类似测量相比,这反过来又允许更准确地计算这些项的能量和至少两个数量级的跃迁频率。关键词:锌原子,原子的三重态,里德伯态,激光激发,微波辐射
本文章由计算机程序翻译,如有差异,请以英文原文为准。
INVESTIGATION OF THE SPECTRUM OF ZN I ATOMS IN THE TRIPLET RYDBERG STATES
Purpose: This work aims at investigating the zinc atoms in the triplet preionization – Rydberg states. The energy levels of atoms having two electrons outside the closed shell were studied mainly by the optical spectroscopy methods. However, just using the microwave spectroscopy to measure the frequency of transitions between the two Rydberg states allows to increase the accuracy of measurements in two or more orders of magnitude. Disign/methodology/approach:A line of three dye lasers is used to excite the zinc atoms into the triplet Rydberg states with a predetermined set of quantum numbers. The radiation of the first two of them is transformed into the second harmonic in nonlinear crystals. Dye lasers are excited by the radiation of the second harmonic of one YAG: ND3+ laser. All three radiations are reduced to the zone of interaction with the laser and the microwave radiation, which is located between the plates of the ionization cell, where the pulsed electric field is created. The excited Rydberg atoms are recorded with the field ionization procedure. The beam of neutral atoms is created by an effusion cell under the vacuum conditions, the residual pressure does not exceed 10-5 mm Hg. A pulsed electric field of some certain intensity results inionization of atoms excited by microwave radiation and in acceleration of electrons, which have appeared in the direction of the secondary electron multiplier, though being insufficient for ionization of atoms excited only by the laser radiation and which are initial for interaction with microwaves. By scanning the microwave radiation frequency with the given step and measuring the signal intensity of the secondary electron multiplier, the excitation spectrum of the atoms under study can be obtained. Findings: Using the created laser-microwave spectrometer, the frequencies of the F→D, F→F and F→G transitions between the triplet Rydberg states of zinc atoms were measured. From the analysis made of the transition frequencies, the quantum defect decomposition constants were obtained by the Ritz formula for the D, F, and G states of zinc atoms. Conclusions: The frequencies of the F→D, F→F and F→G transitions between the triplet Rydberg states of zinc atoms were measured that allowed obtaining the quantum defect decomposition constants according to the Ritz formula for the D, F and G states of zinc atoms, that in turn had allowed to calculate the energy of these terms and the transition frequencies at least in two orders of magnitude more accurately as against the similar measurements made by the optical spectroscopy. Key words: zinc atom, triplet states of atoms, Rydberg states, laser excitation, microwave radiation
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来源期刊
Radio Physics and Radio Astronomy
Radio Physics and Radio Astronomy Physics and Astronomy-Physics and Astronomy (miscellaneous)
CiteScore
0.60
自引率
0.00%
发文量
18
审稿时长
8 weeks
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