Angular correlation positron annihilation spectroscopy applied in investigation of neutron irradiated RPV-steels

2000 ◽  
Vol 11 (1) ◽  
pp. 39-47 ◽  
Author(s):  
Vladimír Slugeň ◽  
Ján Haščík ◽  
Rudolf Gröne
Keyword(s):  
Positron Annihilation ◽  
Angular Correlation ◽  
Positron Annihilation Spectroscopy

scholarly journals Application of positron spectroscopy for investigation of threshold space of oil-gas rocks

2014 ◽  
Vol 12 (12) ◽  
pp. 1280-1284
Author(s):  
Konstantin Arefyev ◽  
Victor Grafutin ◽  
Evgeny Prokopyev ◽  
Andrey Lider ◽  
Roman Laptev ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Positron Annihilation ◽  
Angular Correlation ◽  
Pore Space ◽  
Positron Annihilation Spectroscopy ◽  
Spectroscopy Method ◽  
Positron Spectroscopy ◽  
Coal Deposits ◽  
Oil Gas

AbstractThis article considers the possibility of applying the positron annihilation spectroscopy method for investigating the pore space of rocks from oil-gas and methane-coal deposits. The diagnostics of the structure was performed using the method of spectrometry of angular correlation of annihilation rays (ACAR). Using the samples of porous silicon, the authors have shown the applicability of the ACAR method for determination of the average dimensions of spherical and cylindrical nanosized objects and their concentration

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

Positron Annihilation with Core Electrons in the Noble Metals

1974 ◽  
Vol 52 (4) ◽  
pp. 336-339 ◽  
Author(s):  
E. H. Becker ◽  
A. G. Gould ◽  
E. M. D. Senicki ◽  
B. G. Hogg
Keyword(s):  
Simple Model ◽  
Fermi Surface ◽  
Single Crystals ◽  
Positron Annihilation ◽  
Angular Correlation ◽  
Noble Metals ◽  
Correlation Data ◽  
Core Electrons

Experimental angular correlation curves for identically oriented single crystals of copper, silver, and gold have been obtained using "a point geometry" apparatus. The differences between these angular correlation data are compared to the differences predicted using a simple model of the Fermi surface combined with calculations of the theoretical core distributions.

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

Investigation of Polymer Relaxation after Deformation by Positron Annihilation

1992 ◽  
Vol 247 ◽  
Author(s):  
Sergey A. Tishin ◽  
Mihail I. Tsapovestsky ◽  
Vladimir A. Tishin ◽  
Vladimir N. Kestelman
Keyword(s):  
Positron Annihilation ◽  
Angular Correlation ◽  
Life Time ◽  
Slow Relaxation ◽  
Dielectric Losses ◽  
Free Film ◽  
Axial Tension ◽  
Polymer Relaxation ◽  
Sample Density ◽  
Nonmonotonic Change

ABSTRACTThe relaxation of polyimid films after the axial tension has been investigated by measuring life-time of positrons and angular correlation of annihilation photons. The nonmonotonic change of mean life-time while relaxing the free film has been found. Two range of changes of positron-sensitive properties can be seen: “rapid” relaxation for 4–5 hours (characterized by reducing life-time of short-lived component) and “slow” relaxation (characterized by reducing the intensity of long-lived component). The results of this investigation have been compared with those of measuring of sample density and dielectric losses. The possible explanations and the- changes of mechanizms of relaxation with the conditions of deformation and “the rest” of polymers are analyzed.

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
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