Positron annihilation spectroscopy

In the paper, zeolite ZSM-5 has been synthesized in laboratory. Its structure is then modified by irradiating with electron beam at the different energies and fluences (F). To perform the irradiation process on the electron beam (EB) linear accelerator (UERL-10-15S2), the simultaneous energy degrading and sample containing holde was calculated and designed by MCNP simulation before irradiation.

7p vicedric 08-02-2023 8 3   Download

GEANT4 (GEometry ANd Tracking) is an object-oriented Monte Carlo simulation toolkit to simulate the passage of particles through matter. This research was carried out to model a system for measuring positron lifetime in materials by GEANT4 whereby the nature of positron annihilation in material was understood clearly.

6p visnape 30-01-2023 8 2   Download

Comprehensive ex-situ and in-situ investigations of thermal curing processes in spin-on ultra-low-k thin films conducted by positron annihilation spectroscopy and Fourier transform infrared spectroscopies are presented. Positron annihilation lifetime spectroscopy of ex-situ cured samples reveals an onset of the curing process at about 200 ◦C, which advances with increasing curing temperature.

10p vironald 15-12-2022 4 2   Download

In this study, we investigated the microstructure of such doped fuels as well as a reference standard UO2 by positron annihilation spectroscopy (PAS). Although this technique is particularly sensitive to lattice point defects in materials, a wider application in the UO2 research is still missing.

5p christabelhuynh 30-05-2020 5 1   Download

Positron annihilation spectroscopy (PAS) is a method dedicated to detection of openvolume type of defects. Nowadays, this technique is of a great interest due to the practical character of obtained results. New devices using monoenergetic positron beams are built. The paper presents the basics of PAS, a description of common experimental techniques and two examples of applications.

10p capheny 28-02-2020 16 0   Download