scholarly journals INVESTIGATION OF THE SPECTRUM OF ZN I ATOMS IN THE TRIPLET RYDBERG STATES

2021 ◽  
Vol 26 (3) ◽  
pp. 256-269
Author(s):  
N. I. Pogrebnyak ◽  
◽  
S. F. Dyubko ◽  
M. P. Perepechai ◽  
A. S. Kutsenko ◽  
...  

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

2020 ◽  
Vol 128 (8) ◽  
pp. 1067-1073 ◽  
Author(s):  
E. F. Stelmashenko ◽  
O. A. Klezovich ◽  
V. N. Baryshev ◽  
V. A. Tishchenko ◽  
I. Yu. Blinov ◽  
...  

Shinku ◽  
1974 ◽  
Vol 17 (7) ◽  
pp. 235-241
Author(s):  
Hiroshi YAMAMOTO ◽  
Shigeo YOSHINO

Author(s):  
В.Т. Коган ◽  
Ю.В. Чичагов ◽  
А.А. Богданов ◽  
А.С. Антонов ◽  
Ю.В. Тубольцев ◽  
...  

AbstractAn IDS 2030 IonCCD coordinate-sensitive detector (Analytical/CMS Field Products) is interfaced with a small-sized mass spectrograph developed at the Ioffe Physical Technical Institute, Russian Academy of Sciences. The measurement data obtained with the mass spectrograph using an IonCCD detector and a Magnum-5901-37029PS channel secondary electron multiplier (Photonics USA Inc., United States) are compared. The results of measurements are discussed, and the prospects for using the IonCCD coupled with a microchannel plate are assessed.


1972 ◽  
Vol 27 (1) ◽  
pp. 162-168 ◽  
Author(s):  
Hans Knof ◽  
Volker Hausen ◽  
Dieter Krafft

Abstract An electron attachment ion source was modified in order to be used for quantitative measurement of pure organic substances at pressures up to 1.5 ·10-3 Torr in the space around the ion source. The ion intensity was determined by counting the electron pulses produced by single ions in the secondary electron multiplier. This resulted in higher sensitivities. The measurements of different organic compounds showed that molecular polymers are held together primarily by hydro-gen bonding and by dipole interaction. No molecular polymers could be identified in nonpolar substances. The pressure dependence of the ion intensities indicates that the molecular polymers originate from the gas phase of the reservoir. During the ionization process the hydroxide loses its hydrogen atom as was shown with deuterated samples.


2014 ◽  
Vol 57 (3) ◽  
pp. 317-319
Author(s):  
Z. K. Nurubeyli ◽  
K. Z. Nuriyev ◽  
K. B. Gurbanov ◽  
Sh. Sh. Alekberov ◽  
G. M. Kerimov ◽  
...  

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