scholarly journals Positron Annihilation Lifetime Measurement of Low Temperature Electron Irradiated Fe-Cr-Ni and Fe-Cr-Ni-P Alloys

1994 ◽  
Vol 175-178 ◽  
pp. 407-410 ◽  
Author(s):  
Yasushi Kamimura ◽  
M. Takenaka ◽  
Eiichi Kuramoto
Keyword(s):  
Low Temperature ◽  
Positron Annihilation ◽  
Lifetime Measurement ◽  
Positron Annihilation Lifetime ◽  
Temperature Electron

Seeking the Good Fitting Procedure of PALS Polymer Spectra

2008 ◽  
Vol 607 ◽  
pp. 64-66
Author(s):  
Nicolas Laforest ◽  
Jérémie De Baerdemaeker ◽  
Corine Bas ◽  
Charles Dauwe
Keyword(s):  
Experimental Data ◽  
Low Temperature ◽  
Positron Annihilation ◽  
Physical Meaning ◽  
Lifetime Measurements ◽  
Positron Annihilation Lifetime ◽  
Fitting Procedure ◽  
Fitting Procedures ◽  
Blob Model

Positron annihilation lifetime measurements on polymethylmethacrylate (PMMA) at low temperature were performed. Different discrete fitting procedures have been used to analyze the experimental data. It shows that the extracted parameters depend strongly on the fitting procedure. The physical meaning of the results is discussed. The blob model seems to give the best annihilation parameters.

Positron annihilation lifetime measurement and X-ray analysis on 120 MeV Au +7 irradiated polycrystalline tungsten

2015 ◽  
Vol 467 ◽  
pp. 406-412 ◽  
Author(s):  
Charu Lata Dube ◽  
Pawan Kumar Kulriya ◽  
Dhanadeep Dutta ◽  
Pradeep K. Pujari ◽  
Yashashri Patil ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Lifetime Measurement ◽  
X Ray ◽  
Positron Annihilation Lifetime ◽  
Polycrystalline Tungsten

On the Limits of Sensitivity of PALS to Incorporated Free Volume Holes in Polymeric Membranes and Sorbents: Effect of sc-CO2 in Polyhexafluoropropylene

2017 ◽  
Vol 373 ◽  
pp. 261-264 ◽  
Author(s):  
Victor Shantarovich ◽  
Valentin Bekeshev ◽  
Nikolai Belov ◽  
Irina Kevdina ◽  
Mikhail Filimonov ◽  
...  
Keyword(s):  
Low Temperature ◽  
Size Distribution ◽  
Positron Annihilation ◽  
Free Volume ◽  
Polymeric Membranes ◽  
Positron Annihilation Lifetime Spectroscopy ◽  
Membrane Materials ◽  
Positron Annihilation Lifetime

Positron annihilation lifetime spectroscopy (PALS) is a recognized instrument for the studies of size-distribution of nanopores (intrinsic free volume holes FVH) in polymers, particularly membrane materials. The limits of this application in the case of “alien” pores, produced by swelling of poly (hexafluoro propylene) PHFP in the gas (CO2) in super-critical (sc-) state are discussed. The obtained conclusions are controlled by measurements of low temperature gas (N2) sorption (LTGS) and by comparison of the data with the results on permeation of various gases through the PHFP membrane. Attention is payed to relaxation with time of the newly created FVH in the PHFP membrane.

Positron Annihilation Lifetime Measurement in Supercritical Fluid of N2O

2004 ◽  
Vol 445-446 ◽  
pp. 295-297
Author(s):  
Kazushi Funakoshi ◽  
Yasushi Kino ◽  
Tsutomu Sekine ◽  
Hiroshi Kudo ◽  
Yasuo Ito ◽  
...  
Keyword(s):  
Positron Annihilation ◽  
Supercritical Fluid ◽  
Lifetime Measurement ◽  
Positron Annihilation Lifetime
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