Laser desorption study of beryllium's hydrogen recycling properties at high temperature
1992; Elsevier BV; Volume: 187; Issue: 2 Linguagem: Inglês
10.1016/0022-3115(92)90542-s
ISSN1873-4820
Autores Tópico(s)Nuclear Materials and Properties
ResumoWe have investigated the reemission at > 1000 K of 1.5 keV H ions implanted in beryllium, using a novel method of laser flash desorption. Numerical modelling of the hydrogen evolution as a function of the laser energy indicates that the process is, unexpectedly, detrapping-limited rather than diffusion-limited, with a trap energy of 1.6 ± 0.15 eV and an apparent diffusivity > 10−3 cm2/s at 1200 K. It could imply faster than anticipated H isotope recycling at high temperature. A comparison with other data is made.
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