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An Investigation of Positrons Interacting With Solid Argon, Krypton and Xenon
With this article we intend to shed some light on all the important characteristics of the up-to-date most efficient positron moderators, the rare gas solids. We stress on the importance of the impurities in the performance of the solid rare gas moderators. The impurity factor is linked with the crystalline changes to explain the effect of annealing, and demonstrate the role of impurities in the endurance. Significant increase in the low energy positron yield is observed after repeated anneals. The positron energy distributions from Ar, Kr, and Xe moderators are measured to be about 2 eV (FWHM)
Synthesis of Some Novel Thiadiazaphosphole, Oxazaphospholothiadiazaphosphole, Thiadiazaphosphinine, and Phosphonates Containing a 1,2,4āTriazine Moiety
Effects of alloying elements on defect structures in the incubation period for void swelling in austenitic stainless steels
Positron lifetime measurements were used to study the effects of alloying elements on the defect structure during the incubation period for void swelling in several fcc model alloys. Pure Ni, four model alloys (FeāCrāNi, FeāCrāNiāMoāMn, FeāCrāNiāMoāMnāSi and FeāCrāNiāMoāMnāSiāTi), and four commercial alloys (SUS316LSS, SUS316SS, SUS304SS and Ti added modified SUS316SS) were irradiated with electrons and neutrons. Even at 363 and 573 K to a dose of 0.2 dpa, an effect of alloying elements was observed. At 363 K irradiation, voids were formed only in Ni and FeāCrāNi. At 573 K irradiation, voids were formed in Ni and all model alloys, though the concentration depended on the alloying elements. In commercial alloys, precipitates were formed instead of vacancy clusters, which prevented void growth
The effect of hydrogen-charging in neutron irradiated nickel studied by positron annihilation lifetime spectroscopy (PALS)
UNEXPECTED FORMATION OF 1,4,2-OXAZAPHOSPHORINANE VIA THERMAL DECOMPOSITION OF POLY(URETHANE PHOSPHONATE)
A Study of the Reaction of Phosphorus Trichloride with Paraformaldehyde in the Presence of Carboxylic Acids
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