Positron lifetime study of ion-irradiated tungsten: Ion type and dose effects
Polycrystalline recrystallized tungsten samples were irradiated with 7.5 MeV Si ions and 9 MeV Cu ions to three different damage levels (0.01, 0.1, 0.5 dpa at 200 nm depth) at 295 K. The resulting vacancy-type defects in the samples were studied using positron annihilation lifetime spectroscopy. The...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-03-01
|
| Series: | Nuclear Materials and Energy |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179124000322 |
| _version_ | 1797262931832864768 |
|---|---|
| author | B. Wieluńska-Kuś M. Dickmann W. Egger M. Zibrov Ł. Ciupiński |
| author_facet | B. Wieluńska-Kuś M. Dickmann W. Egger M. Zibrov Ł. Ciupiński |
| author_sort | B. Wieluńska-Kuś |
| collection | DOAJ |
| description | Polycrystalline recrystallized tungsten samples were irradiated with 7.5 MeV Si ions and 9 MeV Cu ions to three different damage levels (0.01, 0.1, 0.5 dpa at 200 nm depth) at 295 K. The resulting vacancy-type defects in the samples were studied using positron annihilation lifetime spectroscopy. The dependence of the average positron lifetime on the damage level is found to be non-linear: a steep increase at low damage levels with a tendency to saturation at higher damage levels (>0.1 dpa). The average positron lifetime of Si and Cu-irradiated tungsten is very similar at each damage level, suggesting similar vacancy-type defect structure. Deconvolution of the positron lifetime spectra revealed that the dominant irradiation-induced defect type is a single vacancy. The presence of small vacancy clusters is also detected. Their fraction is found to increase with increasing damage level. |
| first_indexed | 2024-03-08T00:00:54Z |
| format | Article |
| id | doaj.art-8a3ca75e3ea74de7879b64ff667d2997 |
| institution | Directory Open Access Journal |
| issn | 2352-1791 |
| language | English |
| last_indexed | 2024-04-25T00:04:57Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj.art-8a3ca75e3ea74de7879b64ff667d29972024-03-14T06:14:56ZengElsevierNuclear Materials and Energy2352-17912024-03-0138101610Positron lifetime study of ion-irradiated tungsten: Ion type and dose effectsB. Wieluńska-Kuś0M. Dickmann1W. Egger2M. Zibrov3Ł. Ciupiński4Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warsaw, Poland; Max-Planck-Institut für Plasmaphysik, Boltzmannstraße 2, 85748 Garching, Germany; Corresponding author.Institut für Angewandte Physik und Messtechnik LRT2, Universität der Bundeswehr München, Werner-Heisenberg-Weg 39, 85577, Neubiberg, GermanyInstitut für Angewandte Physik und Messtechnik LRT2, Universität der Bundeswehr München, Werner-Heisenberg-Weg 39, 85577, Neubiberg, GermanyMax-Planck-Institut für Plasmaphysik, Boltzmannstraße 2, 85748 Garching, GermanyFaculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warsaw, PolandPolycrystalline recrystallized tungsten samples were irradiated with 7.5 MeV Si ions and 9 MeV Cu ions to three different damage levels (0.01, 0.1, 0.5 dpa at 200 nm depth) at 295 K. The resulting vacancy-type defects in the samples were studied using positron annihilation lifetime spectroscopy. The dependence of the average positron lifetime on the damage level is found to be non-linear: a steep increase at low damage levels with a tendency to saturation at higher damage levels (>0.1 dpa). The average positron lifetime of Si and Cu-irradiated tungsten is very similar at each damage level, suggesting similar vacancy-type defect structure. Deconvolution of the positron lifetime spectra revealed that the dominant irradiation-induced defect type is a single vacancy. The presence of small vacancy clusters is also detected. Their fraction is found to increase with increasing damage level.http://www.sciencedirect.com/science/article/pii/S2352179124000322Positron lifetime spectroscopyVacancy-type defects in ion-irradiated tungstenTungsten as palsma-facing material |
| spellingShingle | B. Wieluńska-Kuś M. Dickmann W. Egger M. Zibrov Ł. Ciupiński Positron lifetime study of ion-irradiated tungsten: Ion type and dose effects Nuclear Materials and Energy Positron lifetime spectroscopy Vacancy-type defects in ion-irradiated tungsten Tungsten as palsma-facing material |
| title | Positron lifetime study of ion-irradiated tungsten: Ion type and dose effects |
| title_full | Positron lifetime study of ion-irradiated tungsten: Ion type and dose effects |
| title_fullStr | Positron lifetime study of ion-irradiated tungsten: Ion type and dose effects |
| title_full_unstemmed | Positron lifetime study of ion-irradiated tungsten: Ion type and dose effects |
| title_short | Positron lifetime study of ion-irradiated tungsten: Ion type and dose effects |
| title_sort | positron lifetime study of ion irradiated tungsten ion type and dose effects |
| topic | Positron lifetime spectroscopy Vacancy-type defects in ion-irradiated tungsten Tungsten as palsma-facing material |
| url | http://www.sciencedirect.com/science/article/pii/S2352179124000322 |
| work_keys_str_mv | AT bwielunskakus positronlifetimestudyofionirradiatedtungsteniontypeanddoseeffects AT mdickmann positronlifetimestudyofionirradiatedtungsteniontypeanddoseeffects AT wegger positronlifetimestudyofionirradiatedtungsteniontypeanddoseeffects AT mzibrov positronlifetimestudyofionirradiatedtungsteniontypeanddoseeffects AT łciupinski positronlifetimestudyofionirradiatedtungsteniontypeanddoseeffects |