Autor: Zhang, J.-G. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Energy Levels and Oscillator Strength of Ni XXIII
Autorzy:: Hu, F.
Jiang, G.
Yang, J.
Zhang, J.
Zhao, X.
Powiązania:: https://bibliotekanauki.pl/articles/1493444.pdf
Data publikacji:: 2011-09
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 31.15.V-
31.30.jc
Opis:: Energy levels and oscillator strengths have been calculated for the fine-structure transitions among the levels of the $(1s^2) 2s^2 2 p^2,$ $2s2 p^3,$ $2p^4,$ $2s^2 2p3s,$ $2s^2 2p3p,$ and $2s^2 2p3d$ configurations of Ni XXIII using the graspVU and FAC program. The extensive configuration interaction and relativistic effects have been included while generating the wave functions. The results are compared with other recent theoretical estimates, and their accuracy is assessed.
Źródło:: Acta Physica Polonica A; 2011, 120, 3; 429-437
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: HPM Generation by Tri-Anode Coaxial Vircator
Autorzy:: Shao, H.
Liu, G.
Zhang, Y.
Yang, Z.
Sun, J.
Powiązania:: https://bibliotekanauki.pl/articles/1807906.pdf
Data publikacji:: 2009-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.47.Gk
Opis:: A novel type of coaxial vircator with 3 anodes is proposed. The advantages on high power microwave generation is tested by particle-in-cell simulation and theoretical analysis model is set up as well. The tri-anode coaxial vircator behaves a very stable frequency in the pulse duration. In the tri-anode coaxial vircator, the injecting electron beam is well premodulated in the first anode cavity and forms an inerratic bunch-dispersion mechanism in the second anode cavity; the energy-loss electrons penetrate through the third anode and absorbed by the dumping cavity locates in the centre electrode, which helps keeping the bunch-dispersion cycle undisturbed. A 3.8 GHz tri-anode coaxial vircator is theoretically designed and optimized by particle-in-cell simulation, which gives beam-wave conversion efficiency of over 20% with a stable predominant frequency, in accordance with the particle-in-cell simulation and analytic model.
Źródło:: Acta Physica Polonica A; 2009, 115, 6; 1047-1049
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Luminescence Decay Kinetics in GaN Studied by Frequency Domain Measurements
Autorzy:: Mickevičius, J.
Vitta, P.
Tamulaitis, G.
Žukauskas, A.
Shur, M.
Zhang, J.
Yang, J.
Gaska, R.
Powiązania:: https://bibliotekanauki.pl/articles/1813195.pdf
Data publikacji:: 2008-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 72.20.Jv
78.55.Cr
Opis:: Carrier dynamics in high-quality GaN epilayer was investigated at two extreme excitation levels. Carrier lifetime under high excitation conditions was estimated by using light-induced transient grating technique. Measurements at extremely low excitation power density were performed by using frequency-domain fluorescence lifetime technique. The study was performed in a wide temperature range from 8 to 300 K. The results revealed the influence of donor-acceptor pair recombination and carrier trapping processes.
Źródło:: Acta Physica Polonica A; 2008, 113, 3; 833-837
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Synchronization Study and Introductory Experiment οf Laser-Triggered Surface Flashover in Voltage Pulse
Autorzy:: Pan, R.
Wang, J.
Sun, Y.
Sun, G.
Yan, P.
Zhang, D.
Powiązania:: https://bibliotekanauki.pl/articles/1807974.pdf
Data publikacji:: 2009-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 52.80.-s
51.50.+v
Opis:: With the aim of studying the characteristics of laser-triggered surface flashover in voltage pulse, synchronization problem of laser pulse and voltage pulse should be solved. A single/double harmonic, with wavelength λ of 1064/532 nm, Q-switched Nd:YAG laser is used to trigger the surface flashover. The synchronization problem is solved using a self-made digital delay/pulse generator. The delay time and jitter of Marx's trigger input and output, Marx's trigger output and Marx's output, laser input and output are respectively measured. Based on the result of the delay time and the timing sequence of the laser triggering system, the synchronization of laser pulse and voltage pulse is obtained through adjusting the channel delay time of digital delay/pulse generator. In addition, introductory experiment of laser-triggered surface flashover is carried out using the flat electrodes and columned insulators.
Źródło:: Acta Physica Polonica A; 2009, 115, 6; 1167-1169
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 5.

Tytuł:: Superconducting density of states in B-doped diamond
Autorzy:: Onufriienko, O.
Samuely, T.
Zhang, G.
Vanacken, J.
Xu, Zheng
May, P.
Szabó, P.
Moshchalkov, V.
Samuely, P.
Powiązania:: https://bibliotekanauki.pl/articles/1052993.pdf
Data publikacji:: 2017-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.70.Wz
74.62.En
74.55.+v
Opis:: In the presented work, we investigated the superconducting boron doped diamond polycrystalline film prepared by chemical vapor deposition by means of scanning tunneling microscopy/spectroscopy. Differential conductance spectra measured at various temperatures were used to obtain the values of superconducting critical temperature and energy gap. Comparing various theoretical models fitted to the differential conductance spectra measured at 0.5 K suggests weak pair breaking. However, this cannot account for the high 2Δ/(k_{B}T_{C}) ratio, which therefore indicates strong coupling.
Źródło:: Acta Physica Polonica A; 2017, 131, 4; 1033-1035
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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