scholarly journals C60 ions of 1 MeV are slow but elongate nanoparticles like swift heavy ions of hundreds MeV

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
H. Amekura ◽  
K. Narumi ◽  
A. Chiba ◽  
Y. Hirano ◽  
K. Yamada ◽  
...  
Keyword(s):  
Heavy Ions ◽  
Ion Source ◽  
Synergy Effect ◽  
Irradiation Effects ◽  
Nuclear Collisions ◽  
Ion Tracks ◽  
Swift Heavy Ions ◽  
New Type ◽  
Molecule Model ◽  
Track Diameter

Abstract This study reports that high fluence fullerene ion (C60+) irradiation of 1–6 MeV, which was made possible by a new-type of high-flux ion source, elongates metal nanoparticles (NPs) in amorphous SiO2 as efficiently as swift heavy ions (SHIs) of 200 MeV Xe14+, i.e., two orders of the magnitude higher energy ions. Comparing the irradiation effects induced by both the beams, the stopping processes of C60 ions in SiO2 are discussed in this paper. Despite of having almost the same elongation efficiency, the C60+ irradiation induced ~10 times more efficient sputtering due to the clustering enhancement and/or the synergy effect. Ion tracks of ~10.4 nm in diameter and 60–80 nm in length were observed in crystalline SiO2 under 4 MeV C60 irradiation. While the track diameter was comparable to those by SHIs of the same electronic stopping, much shorter track lengths than those predicted by a rigid C60 molecule model indicates that the fragmentation occurred due to nuclear collisions. The elongation of the metal NPs was induced only down to the depth where the tracks were observed but not beyond.

scholarly journals Comprehensive Understanding of Hillocks and Ion Tracks in Ceramics Irradiated with Swift Heavy Ions

2020 ◽  
Vol 4 (4) ◽  
pp. 43
Author(s):  
Norito Ishikawa ◽  
Tomitsugu Taguchi ◽  
Hiroaki Ogawa
Keyword(s):  
Heavy Ions ◽  
Ion Irradiation ◽  
Incidence Angle ◽  
Recrystallization Process ◽  
Comprehensive Understanding ◽  
Ion Tracks ◽  
Swift Heavy Ions ◽  
Transmission Electron ◽  
Niobium Doped ◽  
Track Diameter

Amorphizable ceramics (LiNbO3, ZrSiO4, and Gd3Ga5O12) were irradiated with 200 MeV Au ions at an oblique incidence angle, and the as-irradiated samples were observed by transmission electron microscopy (TEM). Ion tracks in amorphizable ceramics are confirmed to be homogenous along the ion paths. Magnified TEM images show the formation of bell-shaped hillocks. The ion track diameter and hillock diameter are similar for all the amorphizable ceramics, while there is a tendency for the hillocks to be slightly bigger than the ion tracks. For SrTiO3 (STO) and 0.5 wt% niobium-doped STO (Nb-STO), whose hillock formation has not been fully explored, 200 MeV Au ion irradiation and TEM observation were also performed. The ion track diameters in these materials are found to be markedly smaller than the hillock diameters. The ion tracks in these materials exhibit inhomogeneity, which is similar to that reported for non-amorphizable ceramics. On the other hand, the hillocks appear to be amorphous, and the amorphous feature is in contrast to the crystalline feature of hillocks observed in non-amorphizable ceramics. No marked difference is recognized between the nanostructures in STO and those in Nb-STO. The material dependence of the nanostructure formation is explained in terms of the intricate recrystallization process.

Single-ion tracks inGd2Zr2−xTixO7pyrochlores irradiated with swift heavy ions

2009 ◽  
Vol 79 (22) ◽  
Author(s):  
Maik Lang ◽  
Jie Lian ◽  
Jiaming Zhang ◽  
Fuxiang Zhang ◽  
William J. Weber ◽  
...  
Keyword(s):  
Heavy Ions ◽  
Ion Tracks ◽  
Swift Heavy Ions

TEM analysis of ion tracks and hillocks produced by swift heavy ions of different velocities in Y3Fe5O12

2020 ◽  
Vol 127 (5) ◽  
pp. 055902 ◽  
Author(s):  
N. Ishikawa ◽  
T. Taguchi ◽  
A. Kitamura ◽  
G. Szenes ◽  
M. E. Toimil-Molares ◽  
...  
Keyword(s):  
Heavy Ions ◽  
Tem Analysis ◽  
Ion Tracks ◽  
Swift Heavy Ions

Conducting ion tracks generated by charge-selected swift heavy ions

2016 ◽  
Vol 381 ◽  
pp. 76-83 ◽  
Author(s):  
Srashti Gupta ◽  
H.G. Gehrke ◽  
J. Krauser ◽  
C. Trautmann ◽  
D. Severin ◽  
...  
Keyword(s):  
Heavy Ions ◽  
Ion Tracks ◽  
Swift Heavy Ions

scholarly journals Comparative study of irradiation effects in graphite and graphene induced by swift heavy ions and highly charged ions

Carbon ◽  
2016 ◽  
Vol 100 ◽  
pp. 16-26 ◽  
Author(s):  
J. Zeng ◽  
J. Liu ◽  
H.J. Yao ◽  
P.F. Zhai ◽  
S.X. Zhang ◽  
...  
Keyword(s):  
Comparative Study ◽  
Heavy Ions ◽  
Highly Charged Ions ◽  
Irradiation Effects ◽  
Swift Heavy Ions ◽  
Charged Ions

Synchrotron x-ray diffraction analysis of gadolinium and lanthanum titanate oxides irradiated by xenon and tantalum swift heavy ions

2015 ◽  
Vol 1743 ◽  
Author(s):  
Sulgiye Park ◽  
Maik Lang ◽  
Cameron L. Tracy ◽  
Fuxiang Zhang ◽  
Christina Trautmann ◽  
...  
Keyword(s):  
Cross Sections ◽  
Heavy Ions ◽  
Layered Perovskite ◽  
X Ray Diffraction ◽  
X Ray ◽  
Swift Heavy Ions ◽  
Lanthanum Titanate ◽  
Radiation Induced ◽  
Consistent Increase ◽  
Track Diameter

ABSTRACTA synthetic cubic pyrochlore, Gd2Ti2O7 (Fd3̅m) irradiated with swift heavy ions is compared with a compositionally-related composition La2Ti2O7 (P21), which has a monoclinic, layered, perovskite-type structure. Irradiation experiments were performed at the GSI Helmholtz Center with 181Ta ions and 129Xe ions at specific energies of 11MeV/amu. At these energies the ions pass entirely through the sample thickness of ∼ 40 μm. Angle-dispersive synchrotron powder x-ray diffraction (XRD) measurements were completed and an increasing ion-induced amorphization with increasing ion fluence was for both phases. The ion track cross-sections for the radiation-induced crystalline-to-amorphous transformation, as determined from the evolution of the integrated peak intensities as a function of fluence, reveal that La2Ti2O7 (track diameter, d ∼ 7.2 nm with 181Ta and 5.1 nm with 129Xe) is more susceptible to amorphization than Gd2Ti2O7 (d ∼ 6.2 nm with 181Ta and 4.6 nm with 129Xe). The radiation response of the two titanate compounds can be understood in the context of their different structures and cation ionic radius ratios rA/rB, where the susceptibility of radiation of titanate pyrochlores is proportionate with this radius ratio. The higher electronic linear energy loss of the 181Ta ions as compared with 129Xe ions leads to a consistent increase of volume amorphized per ion in both materials, which manifests as a larger track diameter.

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