A new approach to near-surface positron annihilation analysis of ion irradiated ferritic alloys

doi:10.1039/d1na00394a

	A new approach to near-surface positron annihilation analysis of ion irradiated ferritic alloys
	Krsjak, Vladimir 4,5; Hruska, Petr 1; Degmova, Jarmila 4,5; Sojak, Stanislav 4,5; Noga, Pavol 5; Shen, Tielong 2; Sabelova, Veronika 4; Egger, Werner 3; Slugen, Vladimir 4
刊名	NANOSCALE ADVANCES
	2021-09-03
页码	12
ISSN号	2516-0230
DOI	10.1039/d1na00394a
通讯作者	Degmova, Jarmila(jarmila.degmova@stuba.sk)
英文摘要	The present work provides an innovative approach to the near-surface slow-positron-beam (SPB) study of structural materials exposed to ion-beam irradiation. This approach enables the use of variable-energy positron annihilation lifetime spectroscopy (PALS) to characterise a wide range of microstructural damage along the ion implantation profile. In a typical application of the SPB PALS technique, positron lifetime is used to provide qualitative information on the size of vacancy clusters as a function of the positron energy, i.e., the probing depth of the spectrometer. This approach is limited to a certain defect concentration above which the positron lifetime gets saturated. In our experiments, we investigated the back-diffusion of positrons and their annihilation at the surface. The probability of such an event is characterised by the positron diffusion length, and it depends on the density of lattice defects, even in the saturation range of the positron lifetime. Until now, the back-diffusion experiments were reported only in connection with Doppler broadening spectroscopy (DBS) of positron-annihilation radiation. To verify the validity of the used approach, we compared the obtained results on helium-implanted Fe9Cr alloy and its oxide dispersion strengthened variant with the transmission electron microscopy and "conventional" slow positron DBS analysis.
资助项目	Slovak Research and Development Agency[APVV-20-0010] ; Scientific Grant Agency of the Ministry of Education, Science, Research and Sport of the Slovak Republic ; Slovak Academy of Sciences[VEGA 1/0382/20] ; Slovak Academy of Sciences[VEGA 1/0395/20] ; European Regional Development Fund[ITMS2014+:313011W085] ; Euratom Research and Training Programme 2019-2020[945234]
WOS关键词	HELIUM BEHAVIOR ; FERRITIC/MARTENSITIC STEELS ; HYDROGEN ; DEFECTS ; BUBBLES ; RATES ; BEAMS
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000697470200001
资助机构	Slovak Research and Development Agency ; Scientific Grant Agency of the Ministry of Education, Science, Research and Sport of the Slovak Republic ; Slovak Academy of Sciences ; European Regional Development Fund ; Euratom Research and Training Programme 2019-2020
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/136527]
专题	中国科学院近代物理研究所
通讯作者	Degmova, Jarmila
作者单位	1.Charles Univ Prague, Fac Math & Phys, V Holesovickach 2, Prague 18000, Czech Republic 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Gansu, Peoples R China 3.Univ Bundeswehr Munchen, Inst Angew Phys & Messtech, Werner Heisenberg Weg 39, D-85577 Neubiberg, Germany 4.Slovak Univ Technol Bratislava, Fac Elect Engn & Informat Technol, Inst Nucl & Phys Engn, Ilkovicova 3, Bratislava 81219, Slovakia 5.Slovak Univ Technol Bratislava, Fac Mat Sci & Technol Trnava, Adv Technol Res Inst, Jana Battu 2781-25, Trnava 91724, Slovakia
推荐引用方式 GB/T 7714	Krsjak, Vladimir,Hruska, Petr,Degmova, Jarmila,et al. A new approach to near-surface positron annihilation analysis of ion irradiated ferritic alloys[J]. NANOSCALE ADVANCES,2021:12.
APA	Krsjak, Vladimir.,Hruska, Petr.,Degmova, Jarmila.,Sojak, Stanislav.,Noga, Pavol.,...&Slugen, Vladimir.(2021).A new approach to near-surface positron annihilation analysis of ion irradiated ferritic alloys.NANOSCALE ADVANCES,12.
MLA	Krsjak, Vladimir,et al."A new approach to near-surface positron annihilation analysis of ion irradiated ferritic alloys".NANOSCALE ADVANCES (2021):12.