Journal ArticleDOI
Program system for analysing positron lifetime spectra and angular correlation curves
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This article is published in Computer Physics Communications.The article was published on 1984-01-01. It has received 919 citations till now. The article focuses on the topics: Positron Lifetime Spectroscopy & Positron.read more
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The temperature dependence of positron lifetimes in solid pivalic acid
TL;DR: In this article, the temperature dependence of positron lifetimes in both the brittle and plastic phases of trimethylacetic (pivalic) acid was examined using the positron lifetime technique.
Journal ArticleDOI
Microcomputer program for analysis of positron annihilation lifetime spectra
TL;DR: In this paper, a user friendly program (LT) for analysis of the lifetime spectra has been designed for personal computers, which enables one to analyse both discrete and continuous spectra as well as mixed- partially linear and partially continuous spectras.
Journal ArticleDOI
Positron annihilation spectroscopy for chemical analysis: A novel probe for microstructural analysis of polymers☆
TL;DR: Positron annihilation spectroscopy for chemical analysis (PASCA) has been developed to analyze the microstructure of polymers as discussed by the authors, where the positronium atom is trapped in the atomic-scale holes which have a size ranging from 1 to 10 A. Theoretical aspects, experimental developments, and examples in analyzing the microstructures of epoxy, PEEK, and PMMA polymers are presented.
Journal ArticleDOI
Positron Annihilation Spectroscopic Evidence to Demonstrate the Flux-Enhancement Mechanism in Morphology-Controlled Thin-Film-Composite (TFC) Membrane
TL;DR: The PALS results are the first to experimentally show that the thin films of cross-linked aromatic polyamide RO membranes are composed of two types of pores, which increase in the size and number of network pores by means of DMSO addition during interfacial polymerization enhances the water flux notably.
References
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LINPACK User's Guide.
TL;DR: The use of least-squares techniques for this and G. W. Stewart, LINPACK Users' Guide for Intel® Math Kernel Library 11.3 for Linux* OS are provided.
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A variable projection method for solving separable nonlinear least squares problems
Linda Kaufman,Linda Kaufman +1 more
TL;DR: In this paper, a new method for determining the optimal α which computationally has proved more efficient than the Golub-Pereyra scheme was proposed, which can be reduced to a nonlinear least square problem involving α only, and a linear least squares problem involvinga only.
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Positron Annihilation Study of Defects in Succinonitrile
TL;DR: Positron lifetime and angular correlation measurements have been made on the plastic crystal succinonitrile as discussed by the authors, and they confirm the phase transition at 234 \ifmmode\pm\else\textpm\fi{} 1 K.
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Solvated positron chemistry. II. The reaction of hydrated positrons with Cl−, Br− and I− ions
TL;DR: In this article, the reaction of the hydrated positron, e aq + with Cl −, Br −, and I − ions in aqueous solutions was studied by means of positron.