positron annihilation in solidstantalum/ Doppler broadeningpositron annihilation photonsmetalspositron lifetime spectralow electron momentumThe Doppler broadening of positron annihilation photons was measured in 17 metals. A model which considers the positron lifetime spectra in metals to be composed of terms...
Analysis of the S parameter derived from Doppler Broadening Annihilation Spectroscopy (DBAS) furnished insights into the presence of vacancy defects within the TiN nanocrystals. The diminishing trend in the S parameter with increasing positron energy or depth of positron implantation indicates a decline ...
Positron Annihilation Techniques have been proved to be a characteristic tool in the research of lattice defects in metals and alloys. Especially, vacancy type point defects and dislocations can be detected. During recent years, researchers have completed Doppler broadening and positron lifetime measureme...
Positron annihilation in tin has been studied as a function of temperature. The Doppler broadening of the 511keV line has been measured with a germanium photon detector system. For annealed white tin the positron parameters show only a small increase on approach to melting. For the tin sample ...
Coincidence Doppler Broadening of Positron Annihilation Radiation for Detection of Helium in Irradiated Ni and Cu A new composition analysis method, namely, coincidence Doppler broadening (CDB) of positron annihilation radiation, was employed to detect He atoms in ion ... Q.,Xu,T.,... - 《Mater...
The variable-energy positron annihilation lifetime (VEPAL) and Doppler broadening of the annihilation line (VEDBAL) techniques were applied to study structural changes in ultra-high molecular weight polyethylene after implantation with 30-keV carbon ions with fluences of 5 脳 1014, 5 脳 ...
Positron-annihilation lifetime and positron-annihilation Doppler-broadening (PADB) spectroscopies have been employed to investigate the formation of vacancy-type compensation defects inn-type undoped liquid encapsulated Czochrolski grown InP, which undergoes conduction-type conversions under high temperature an...
Doppler-broadening slow positron annihilation spectroscopy is used to measure the concentration, spatial distribution, and size of open-volume defects in surface and interface of material. In this method, the quantitative evaluation is generally carried out with the line shape parameter S and W, but...
Ramachandran, R.; David, C.; Rajaraman, R.; Panigrahi, B.K.; Amarendra, G. Evolution, migration and clustering of helium-vacancy complexes in RAFM steel-depth resolved positron annihilation Doppler broadening study. Philos. Mag. 2016, 96, 2385-2396. [CrossRef]...
Positron annihilation in lead 来自 Semantic Scholar 喜欢 0 阅读量: 21 作者:Rice-evans, P,Chaglar, I,Khangi, F. A. R. El 摘要: The Doppler-broadening of the radiation from positrons annihilating in lead has been measured over the temperature range 4.2-600 K. The creation of mono-...