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Novel mechanism of damage introduction into carbon nanotubes caused by irradiation in gas medium
Author(s) -
Danilchenko Boris A.,
Tripachko Nikolay A.,
Uvarova Irina Y.,
Yaskovets Ivan I.
Publication year - 2013
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201200976
Subject(s) - irradiation , helium , hydrogen , carbon nanotube , materials science , argon , deuterium , electron , carbon fibers , atmospheric pressure , atomic physics , chemical physics , nanotechnology , chemistry , nuclear physics , composite material , physics , organic chemistry , composite number , meteorology
In situ measurements of the resistance changes of carbon nanotube bundles irradiated by 60 Co γ‐quanta at room temperature are presented. The peculiarity of our study consists in providing the sample irradiation in a hermetic cell filled with different gases at atmosphere pressure. Here we demonstrate the results for irradiation in hydrogen, deuterium, helium and argon media. The obtained dependences of the resistance change versus irradiation dose in vacuum are presented, too. We have developed a novel two‐stage mechanism, which implies defect introduction by energetic intermediate particles that are gas atoms. Preliminary calculations for Compton electrons (0.85 MeV) and atmospheric gas pressure show the high efficiency of this two‐stage mechanism in comparison to conventional one‐stage mechanism. It is shown that the defect introduction rate in the developed two‐stage mechanism is strongly dependent on the gas atomic mass and coincides well with our experimental results.