scholarly journals Investigation on annealed Fe43Co43Hf7B6Cu1 amorphous alloy by positron annihilation spectroscopy

2011 ◽  
Vol 60 (1) ◽  
pp. 017504
Author(s):  
Chao Yue-Sheng ◽  
Guo Hong ◽  
Gao Xiang-Yu ◽  
Luo Li-Ping ◽  
Zhu Han-Xian
Keyword(s):  
Amorphous Alloy ◽  
Positron Annihilation ◽  
Positron Annihilation Spectroscopy

Hydrogen diffusion in amorphous Cu50Ti50 studied by positron-annihilation spectroscopy

1988 ◽  
Vol 66 (6) ◽  
pp. 476-477 ◽  
Author(s):  
R. A. Dunlap ◽  
A. M. Putnam ◽  
D. S. Vardy
Keyword(s):  
Amorphous Alloy ◽  
Positron Annihilation ◽  
Momentum Distribution ◽  
Hydrogen Diffusion ◽  
Positron Annihilation Spectroscopy ◽  
Crystalline Alloy ◽  
Hydrogenated Amorphous ◽  
Trapping Sites

Positron-annihilation spectroscopy has been used to study the density of trapping sites in amorphous and crystalline Cu50Ti50. The effects of hydrogenation on the positron-annihilation spectrum in the amorphous alloy are also investigated. It is shown that the amorphous alloy has a higher concentration of trapping sites than the crystalline alloy and that in the hydrogenated amorphous alloy, the positrons are annihilated by electrons having a momentum distribution that is very nearly the same as in the crystalline alloy.

scholarly journals Native vacancy defects in Zn1−x(Mn,Co)xGeAs2 studied with positron annihilation spectroscopy

2009 ◽  
Vol 106 (1) ◽  
pp. 013524 ◽  
Author(s):  
L. Kilanski ◽  
A. Zubiaga ◽  
F. Tuomisto ◽  
W. Dobrowolski ◽  
V. Domukhovski ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Positron Annihilation Spectroscopy ◽  
Vacancy Defects

scholarly journals Positron annihilation spectroscopy on a beam of positrons the LEPTA facility

2016 ◽  
Vol 132 ◽  
pp. 03014
Author(s):  
E.V. Ahmanova ◽  
M.K. Eseev ◽  
A.G. Kobets ◽  
I.N. Meshkov ◽  
O.S. Orlov ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Positron Annihilation Spectroscopy

scholarly journals Direct evidence of impurity decoration of Ga vacancies inGaNfrom positron annihilation spectroscopy

2006 ◽  
Vol 73 (19) ◽  
Author(s):  
S. Hautakangas ◽  
I. Makkonen ◽  
V. Ranki ◽  
M. J. Puska ◽  
K. Saarinen ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Direct Evidence ◽  
Positron Annihilation Spectroscopy

Characterization of ethylcellulose free films by positron annihilation spectroscopy and mechanical testing

2014 ◽  
Vol 115 ◽  
pp. 47-50 ◽  
Author(s):  
Diána Hegyesi ◽  
Károly Süvegh ◽  
András Kelemen ◽  
Klára Pintye-Hódi ◽  
Géza Regdon
Keyword(s):  
Positron Annihilation ◽  
Mechanical Testing ◽  
Positron Annihilation Spectroscopy ◽  
Free Films

Annihilation Lifetime Spectroscopy Using Positrons from Bremsstrahlung Production

2012 ◽  
Vol 331 ◽  
pp. 41-52 ◽  
Author(s):  
Andreas Wagner ◽  
Wolfgang Anwand ◽  
Maik Butterling ◽  
Thomas E. Cowan ◽  
Fine Fiedler ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Linear Accelerator ◽  
Electron Accelerator ◽  
Positron Annihilation Spectroscopy ◽  
Doppler Broadening ◽  
Electron Linear Accelerator ◽  
Positron Annihilation Lifetime ◽  
Electron Bremsstrahlung ◽  
New Type ◽  
Set Up

A new type of a positron annihilation lifetime spectroscopy (PALS) system has been set up at the superconducting electron accelerator ELBE [ at Helmholtz-Zentrum Dresden-Rossendorf. In contrast to existing source-based PALS systems, the approach described here makes use of an intense photon beam from electron bremsstrahlung which converts through pair production into positrons inside the sample under study. The article focusses on the production of intense bremsstrahlung using a superconducting electron linear accelerator, the production of positrons inside the sample under study, the efficient detector setup which allows for annihilation lifetime and Doppler-broadening spectroscopy simultaneously. Selected examples of positron annihilation spectroscopy are presented.

Sign in / Sign up

Export Citation Format

Share Document