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@ARTICLE{Eichler:891432,
author = {Eichler, Michael},
title = {{I}nvestigation of hydrogen isotope retention mechanisms in
beryllium: {H}igh resolution {TPD} measurements},
journal = {Nuclear materials and energy},
volume = {19},
issn = {2352-1791},
address = {Amsterdam [u.a.]},
publisher = {Elsevier},
reportid = {FZJ-2021-01517},
pages = {440 - 444},
year = {2019},
abstract = {The retention of ion-implanted deuterium in beryllium poly-
and single crystals at room temperature is studied using
high precision temperature programmed desorption
spectroscopy (TPD). Slow temperature ramps of 0.01 K/s in
combination with well-defined experimental conditions are
used to resolve the low temperature desorption regime for
the first time revealing three sharp desorption peaks. The
comparison to results of a coupled reaction diffusion system
(CRDS) model shows, that the corresponding release
mechanisms cannot be described by thermally activated rate
processes. SEM images of a polycrystalline beryllium sample
after implantation of deuterium with 2 keV per D atom show
the formation of blisters of roughly 1 µm in diameter.
Additionally, cracks on top of the blisters are found as
well as spots, on which blisters are peeled off. Both
processes are discussed to play a role in the low
temperature release regime of the retained deuterium.
Investigation of TPD spectra performed on single crystalline
beryllium shows a jagged pattern in the low temperature
release regime, which can be connected to blisters bursting
up, releasing big amounts of deuterium in short time
scales.},
cin = {IEK-4},
ddc = {624},
cid = {I:(DE-Juel1)IEK-4-20101013},
pnm = {174 - Plasma-Wall-Interaction (POF3-174)},
pid = {G:(DE-HGF)POF3-174},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000470746100068},
doi = {10.1016/j.nme.2019.03.018},
url = {https://juser.fz-juelich.de/record/891432},
}