2 research outputs found
Electron screening in d(d, p)t for deuterated metals: temperature effects
The electron screening in the d(d, p)t reaction has been studied for the deuterated metal Pt at a sample temperature T = 20 °C–340 °C and for Co at T = 20 °C and 200 °C. The enhanced electron screening decreases with increasing temperature, where the data agree with the plasma model of Debye applied to the quasi-free metallic electrons. The data represent the first observation of a temperature dependence of a nuclear cross section. We also measured the screening effect for the deuterated metal Ti (an element of group 4 of the periodic table) at T = −10 °C–200 °C: above 50 °C, the hydrogen solubility dropped to values far below 1 and a large screening effect became observable. Similarly, all metals of groups 3 and 4 and the lanthanides showed a solubility of a few per cent at T = 200 °C (compared to T = 20 °C) and a large screening also became observable. Within the Debye model, the deduced number of valence electrons per metallic atom agrees with the corresponding number from the Hall coefficient, for all metals investigated
Electron screening in d(d, p)t for deuterated metals: temperature effects
The electron screening in the d(d, p)t reaction has been studied for the deuterated
metal Pt at a sample temperature T = 20 ◦C–340 ◦C and for Co at T = 20 ◦C
and 200 â—¦C. The enhanced electron screening decreases with increasing
temperature, where the data agree with the plasma model of Debye applied
to the quasi-free metallic electrons. The data represent the first observation
of a temperature dependence of a nuclear cross section. We also measured
the screening effect for the deuterated metal Ti (an element of group 4 of the
periodic table) at T = −10 ◦C–200 ◦C: above 50 ◦C, the hydrogen solubility
dropped to values far below 1 and a large screening effect became observable.
Similarly, all metals of groups 3 and 4 and the lanthanides showed a solubility of
a few per cent at T=200 â—¦C (compared to T=20 â—¦C) and a large screening also
became observable. Within the Debye model, the deduced number of valence
electrons per metallic atom agrees with the corresponding number from the
Hall coefficient, for all metals investigated.
(Some figures in this article are in colour only in th