Open AccessEffect of helium irradiation fluence on HenVm cluster evolution in nickel studied by positron annihilation spectroscopy
Author(s) -
Yihao Gong,
Shuoxue Jin,
Eryang Lu,
Te Zhu,
Ligang Song,
Daqing Yuan,
Baoyi Wang,
Xingzhong Cao
Publication year - 2018
Language(s) - English
Resource type - Conference proceedings
DOI - 10.7567/jjapcp.7.011105
Subject(s) - helium , irradiation , fluence , materials science , nickel , vacancy defect , positron annihilation spectroscopy , atomic physics , doppler broadening , positron , spectroscopy , positron lifetime spectroscopy , ion , cluster (spacecraft) , spectral line , positron annihilation , nuclear physics , nuclear magnetic resonance , physics , metallurgy , electron , astronomy , computer science , programming language , quantum mechanics
Polycrystalline nickel was irradiated using 50 keV He ions at room temperature. The irradiated fluences were 5× 1013 He cm−2, 5× 1014 He cm−2, and 5× 1015 He cm−2, respectively. Positron annihilation Doppler broadening spectroscopy (DBS) was used to characterize the irradiation-induced defect evolution. The DBS results show that a large amount of vacancy defects were introduced in the specimens after helium irradiation. In addition, the DBS data could be also interpreted as the formation of helium-vacancy (HenVm) clusters due to combination between vacancies and helium atoms.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom