English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The apparent similarity of the rare gas diffusion and the recoil annealing processes both resulting in “pseudo-plateaux” leads to study these processes in CaCrO 4 -crystals in order to find out a possible relationship. The material used was crystallized from solution, dried at room temperature (sample A) and at 200° C (sample B), an average grain size of 130  μ   was selected and irradiated for 8 hours with pile neutrons in a flux of 4 x 10 12 n/cm 2   · sec. The diffusion of the homogenously distributed  37 Ar, produced by  40 Ca (n, ɑ) process was investigated in the temperature range from 100 to 800° C. The thermal annealing of (n, γ)  51 Cr-recoil fragments could be measured between 100 and 300° C. - It was found that the percentage of released  37 Ar is much dependent on the thermal treatment of the CaCrO 4 -crystals. For instance about 52% of the  37 Ar diffused already in 3 hours at 300° C from sample (A), while from the tempered sample (B) only about 5% was lost. In both preparations the  37 Ar-release reaches 100% at about 800° C possibly favoured by oxygen liberation.

Studies on the Diffusion of 37 Ar and the Thermal Annealing of 51 Cr Recoil in Neutron Irradiated CaCrO 4 -Crystals