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Author Shimada, Masashi ♦ Kobayashi, Makoto ♦ Oda, Takuji ♦ Hara, Masanori ♦ Watanabe, Hideo ♦ Hatano, Yuji ♦ Calderoni, Pattrick
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ♦ ACTIVATION ENERGY ♦ DEFECTS ♦ DESORPTION ♦ DEUTERIUM ♦ DIFFUSION ♦ DISLOCATIONS ♦ IRRADIATION ♦ NEUTRONS ♦ RETENTION ♦ SPECTRA ♦ SPECTROSCOPY ♦ TRAPPING ♦ TUNGSTEN ♦ deuterium retention ♦ tungsten
Abstract The behavior of D retention for Fe{sup 2+}-irradiated tungsten with a damage of 0.025-3 dpa was compared with that for neutron-irradiated tungsten with 0.025 dpa. The D{sub 2} thermal desorption spectroscopy (TDS) spectra for Fe{sup 2+}-irradiated tungsten consisted of two desorption stages at 450 and 550 K, while that for neutron-irradiated tungsten was composed of three stages and an addition desorption stage was found at 750 K. The desorption rate of the major desorption stage at 550K increased as the displacement damage increased due to Fe{sup 2+} irradiation increasing. In addition, the first desorption stage at 450K was found only for damaged samples. Therefore, the second stage would be based on intrinsic defects or vacancy produced by Fe{sup 2+} irradiation, and the first stage should be the accumulation of D in mono-vacancy and the activation energy would be relatively reduced, where the dislocation loop and vacancy is produced. The third one was found only for neutron irradiation, showing the D trapping by a void or vacancy cluster, and the diffusion effect is also contributed to by the high full-width at half-maximum of the TDS spectrum. Therefore, it can be said that the D{sub 2} TDS spectra for Fe{sup 2+}-irradiated tungsten cannot represent that for the neutron-irradiated one, indicating that the deuterium trapping and desorption mechanism for neutron-irradiated tungsten is different from that for the ion-irradiated one.
ISSN 00318949
Educational Use Research
Learning Resource Type Article
Publisher Date 2011-12-01
Publisher Place United States
Journal Physica Scripta
Volume Number 2011
Issue Number T145
Technical Publication No. INL/JOU-11-24944
Organization Idaho National Laboratory (INL)


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