scholarly journals The Defect Characterization of Rare-earth Intensifying Screen Material by Doppler Broadening Positron Annihilation Spectrometer

2005 ◽  
Vol 15 (6) ◽  
pp. 370-374 ◽  
Author(s):  
C. Y. Lee ◽  
C. G. Kim ◽  
G. Y. Song ◽  
J. H. Kim
Keyword(s):  
Rare Earth ◽  
Positron Annihilation ◽  
Defect Characterization ◽  
Doppler Broadening ◽  
Intensifying Screen

Depth resolved defect characterization of energetic ion irradiated ZnO by positron annihilation techniques and photoluminescence

2019 ◽  
Vol 32 (8) ◽  
pp. 085703
Author(s):  
A Sarkar ◽  
M Chakrabarti ◽  
D Sanyal ◽  
N Gogurla ◽  
P Kumar ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Defect Characterization

scholarly journals Positron Annihilation Spectroscopy as a Diagnostic Tool for the Study of LiCoO2 Cathode of Lithium-Ion Batteries

2021 ◽  
Vol 6 (3) ◽  
pp. 28
Author(s):  
Gioele Pagot ◽  
Valerio Toso ◽  
Bernardo Barbiellini ◽  
Rafael Ferragut ◽  
Vito Di Noto
Keyword(s):  
Lithium Ion Batteries ◽  
Positron Annihilation ◽  
Positron Lifetime ◽  
Lithium Ion ◽  
Positron Annihilation Spectroscopy ◽  
State Of Charge ◽  
Doppler Broadening ◽  
Li Ion Batteries ◽  
Li Ion

Positron annihilation spectroscopy using lifetime and Doppler broadening allows the characterization of the lithiation state in LiCoO2 thin film used in cathode of lithium-ion batteries. The lifetime results reflect positron spillover because of the presence of graphite in between the oxide grains in real cathode Li-ion batteries. This spillover produces an effect in the measured positron parameters which are sensitive to delocalized electrons from lithium atoms as in Compton scattering results. The first component of the positron lifetime corresponds to a bulk-like state and can be used to characterize the state of charge of the cathode while the second component represents a surface state at the grain-graphite interface.

scholarly journals Structural and defect characterization of Gd-doped GaN films by X-ray diffraction and positron annihilation

2014 ◽  
Vol 505 ◽  
pp. 012023
Author(s):  
A Yabuuchi ◽  
N Oshima ◽  
B E O'Rourke ◽  
R Suzuki ◽  
K Ito ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Defect Characterization ◽  
X Ray Diffraction ◽  
X Ray

Defect Characterization in Thermoelectric Zn-Sb Systems by Positron Annihilation

2017 ◽  
Vol 373 ◽  
pp. 245-248
Author(s):  
Ting Zhang ◽  
Kai Zhou ◽  
Zhi Quan Chen
Keyword(s):  
Positron Annihilation ◽  
Momentum Distribution ◽  
Defect Characterization ◽  
Doppler Broadening ◽  
Lifetime Measurements ◽  
Electron Positron ◽  
Momentum Distributions ◽  
Positron Lifetimes ◽  
Doppler Broadening Spectra ◽  
Coincidence Doppler Broadening

Positron lifetimes and momentum distributions of annihilating electron-positron pairs have been calculated for vacancies in ZnSb and Zn4Sb3. The calculated positron lifetimes for bulk ZnSb and Zn4Sb3 are 203 ps and 208 ps, and for VZn in ZnSb and Zn4Sb3 are 249 ps and 237 ps respectively. The calculated momentum distribution results indicate the VZn in both ZnSb and Zn4Sb3 has less characterization from elemental Zn. Using coincidence Doppler broadening spectra combined with lifetime measurements can reveal the vacancy structure in ZnSb and Zn4Sb3.

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