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pro vyhledávání: '"M. Szuszkiewicz"'
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Publikováno v:
Acta Physica Polonica A. 113:1507-1510
Angular distributions of the positron annihilation quanta were measured for steel ST2 SAL samples deformed by uniaxial tension up to difierent deformation degrees. The dependences of the S parameter on the relative elongation of the samples are prese
Publikováno v:
Acta Physica Polonica A. 110:691-699
Results of experimental investigations of uniaxially elongated mono- and polycrystalline samples of several metals (Fe, Ta, Pd, Ag, and Au), performed using the positron annihilation methods, are reviewed. The dependences of the S-parameters and posi
Publikováno v:
Acta Physica Polonica A. 110:615-620
Positron lifetime measurements in hostaphan RNK, used for encapsulation of Na positron sources, were performed. It was found that the parameter of positron lifetime spectra in hostaphan RNK differ markedly from those for other forms of polyethylene t
Autor:
W. Rudzińska, M. Szuszkiewicz
Publikováno v:
Acta Physica Polonica A. 110:701-708
The temperature dependences of the positron annihilation parameters F and R were determined for Sn–45 wt.% In and Sn–77 wt.% In alloys. The obtained results enabled to verify the vacancy and the quasicrystalline models of the melting process. It
Publikováno v:
Acta Physica Polonica A. 107:848-851
Angular distribution of the positron annihilation quanta was measured for monocrystalline gold samples, oriented in (110) and (111) directions. The samples were deformed by elongation for different deformation degrees. The S and W parameters as a fun
Publikováno v:
Acta Physica Polonica A. 107:857-863
Angular distributions of the positron annihilation quanta were measured for polycrystalline samples deformed by uniaxial tension up to difierent deformation degrees. The S parameter as a function of the W parameter was determined. The data obtained f
Publikováno v:
Acta Physica Polonica A. 107:570-575
Weighted difference curves have been shortly presented as a proper tool allowing to analyze in another way two-detector Doppler spectra regarding positron annihilation with admixture electrons in some nickel alloys. The analysis of low and middle mom
Publikováno v:
Physica Scripta. 71:111-114
Angular distributions of positron annihilation quanta, positron lifetime and resistivity were measured for polycrystalline iron samples deformed by uniaxial tension up to different deformation degrees. The S parameter as a function of the W parameter
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 526:420-431
A two-detector spectrometer for measurements of Doppler broadened positron annihilation spectra has been constructed and tested. The energy difference of the annihilation quanta is measured in the analogue, not in the digital manner. The peak to back