Autor: Deng, W. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Systematic Measurements of Doppler-Coincidence Spectra for Positron Annihilation in Pure Metals and Semiconductors
Autorzy:: Deng, W.
Pliszka, D.
Brusa, R. S.
Karwasz, G. P.
Zecca, A.
Powiązania:: https://bibliotekanauki.pl/articles/2030758.pdf
Data publikacji:: 2002-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.60.+z
78.70.Bj
Opis:: Doppler-broadening measurements of the electron-positron annihilation line in twenty six elements are presented. The adopted coincidence technique allows to reduce the background and point out the contribution of positron annihilation with core electrons. The changes of the high momentum contribution is presented for selected examples and a semiempirical analysis of the dependence on electronic structure is performed. Measured data are in a good agreement with recent theoretical calculations and can be used to identification of impurities surrounding open volume defects.
Źródło:: Acta Physica Polonica A; 2002, 101, 6; 875-892
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Surfaces of Electron-Emitting Glasses Studied by a Slow Positron Beam
Autorzy:: Pliszka, D.
Gazda, M.
Kusz, B.
Trzebiatowski, K.
Karwasz, G. P.
Deng, W.
Brusa, R. S.
Zecca, A.
Powiązania:: https://bibliotekanauki.pl/articles/2025748.pdf
Data publikacji:: 2001
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.60.+z
78.70.Bj
Opis:: Semi-conducting glasses used for electron multipliers and microchannel plate devices are obtained by surface modification of Pb or Bi-reach silicon-based glasses. The reduced layer extends down to 200-500 nm, much more than the effective depth of the electron-emitting layer. By the use of slow-positron beam we monitor the structural changes undergoing in near-to-surface layers after isothermal annealing. The measurements suggest a possible correlation between secondary-electron emission coefficient and the Doppler-broadening S-parameter. On these samples there were also performed atomic force microscopy, secondary electron emission, differential scanning calorimetry, and electric conductivity measurements.
Źródło:: Acta Physica Polonica A; 2001, 99, 3-4; 465-472
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: The Design and the First Test Results of a Fast LTD Stage
Autorzy:: Chen, L.
Zhou, L.
Zou, W.
Ren, J.
Li, Y.
Wu, S.
Xie, W.
Feng, S.
Deng, J.
Powiązania:: https://bibliotekanauki.pl/articles/1807988.pdf
Data publikacji:: 2009-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 84.70.+p
52.75.Kq
84.60.Ve
Opis:: Linear transformer driver stages are designed to be used as a primary energy storage in high power pulsed generators. In this report, the design and test results of the linear transformer driver stage prototype that delivers ≈100 kA fast pulse with 133 ns FWHM into a ≈0.87 Ω resistive load are described. This stage consists of 20 (100 kV, 20 nF) storage capacitors that are arranged in 10 identical bricks located evenly around the axis of the stage. Each brick contains two capacitors, a multi-gap switch, and the output connector that transfers the energy to the resistive load. The outer diameter of the stage is ≈1.5 m, at a length of ≈20 cm. The stage is developed to demonstrate the possibility of the fast linear transformer driver technology to create high power pulsed generators.
Źródło:: Acta Physica Polonica A; 2009, 115, 6; 1186-1188
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Informacja