scholarly journals Development of a Slow Positron Beam System for in-situ Lifetime Measurements During Ion Beam Irradiation

2012 ◽  
Vol 35 ◽  
pp. 111-116 ◽  
Author(s):  
A. Kinomura ◽  
R. Suzuki ◽  
T. Ohdaira ◽  
N. Oshima ◽  
B.E. O’Rourke ◽  
...  
Keyword(s):  
Ion Beam ◽  
Positron Beam ◽  
Beam Irradiation ◽  
Ion Beam Irradiation ◽  
Lifetime Measurements ◽  
Slow Positron ◽  
Beam System

In-situ luminescence measurement of lithium aluminate under ion beam irradiation

1992 ◽  
Vol 191-194 ◽  
pp. 268-271 ◽  
Author(s):  
Yoshiyuki Asaoka ◽  
Hirotake Moriyama ◽  
Kimihiko Iwasaki ◽  
Kimikazu Moritani ◽  
Yasuhiko Ito
Keyword(s):  
Ion Beam ◽  
Lithium Aluminate ◽  
Beam Irradiation ◽  
Ion Beam Irradiation ◽  
Luminescence Measurement

In-situ observation of structural changes in aluminum during He+ and H2+ dual-ion beam irradiation

1992 ◽  
Vol 191-194 ◽  
pp. 1219-1223 ◽  
Author(s):  
S. Furuno ◽  
K. Hojou ◽  
K. Izui ◽  
N. Kamigaki ◽  
K. Ono ◽  
...  
Keyword(s):  
Structural Changes ◽  
Ion Beam ◽  
In Situ Observation ◽  
Beam Irradiation ◽  
Ion Beam Irradiation

Amortization And Dynamic Recovery Of A2BO4 Structure Types During 1.5 MeV Krypton Ion-Beam Irradiation

1993 ◽  
Vol 321 ◽  
Author(s):  
L. M. Wang ◽  
W. L. Gong ◽  
R. C. Ewing
Keyword(s):  
Dynamic Recovery ◽  
Ion Beam ◽  
Recovery Process ◽  
Beam Irradiation ◽  
Ion Beam Irradiation ◽  
Materials Properties ◽  
Recovery Processes ◽  
Rate Of Increase ◽  
A Site

ABSTRACTThe temperature dependence of the critical amorphization dose, Dc, of four A2BO4 compositions, forsterite (Mg2SiO4), fayalite (Fe2SiO4), synthetic Mg2GeO4, and phenakite (Be2SiO4) was investigated by in situ TEM during 1.5 MeV Kr+ion beam irradiation at temperatures between 15 to 700 K. For the Mg- and Fe-compositions, the A-site is in octahedral coordination, and the structure is a derivative hep (Pbnm); for the Be-composition, the A- and B-sites are in tetrahedral coordination, forming corner-sharing hexagonal rings (R3). Although the Dc's were quite close at 15 K for all the four compositions (0.2–0.5 dpa), Dc increased with increasing irradiation temperature at different rates. The Dc-temperature curve is the result of competition between amorphization and dynamic recovery processes. The Dc rate of increase (highest to lowest) is: Be2SiO4, Mg2SiO4, Mg2GeO4, Fe2SiO4. At room temperature, Be2SiO4 amorphized at 1.55 dpa; Fe2SiO4, at only 0.22 dpa. Based on the Dc-temperature curves, the activation energy, Ea, of the dynamic recovery process and the critical temperature, Tc, above which complete amorphization does not occur are: 0.029, 0.047, 0.055 and 0.079 eV and 390, 550, 650 and 995 K for Be2SiO4, Mg2SiO4, Mg2GeO4 and Fe2SiO4, respectively. These results are explained in terms of the materials properties (e.g., bonding and thermodynamic stability) and cascade size which is a function of the density of the phases. Finally, we note the importance of increased amorphization cross-section, as a function of temperature (e.g., the low rate of increase of Dc with temperature for Fe2SiO4).

scholarly journals Dual Ion Beam Irradiation System for In situ Observation with Electron Microscope.

Shinku ◽  
1993 ◽  
Vol 36 (7) ◽  
pp. 603-609
Author(s):  
Tetuo TSUKAMOTO ◽  
Kiiti HOJOU ◽  
Sigemi FURUNO ◽  
Hitosi OTSU ◽  
Kazuhiko IZUI
Keyword(s):  
Electron Microscope ◽  
Ion Beam ◽  
In Situ Observation ◽  
Beam Irradiation ◽  
Ion Beam Irradiation ◽  
Irradiation System

scholarly journals A positron beam study on vacancy formation in iron by ion beam irradiation at low temperature

2010 ◽  
Vol 225 ◽  
pp. 012023 ◽  
Author(s):  
T Iwai ◽  
K Murakami ◽  
Y Katano ◽  
T Iwata ◽  
T Onitsuka ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ion Beam ◽  
Positron Beam ◽  
Vacancy Formation ◽  
Beam Irradiation ◽  
Ion Beam Irradiation

Visualising discrete structural transformations in germanium nanowires during ion beam irradiation and subsequent annealing

Nanoscale ◽  
2014 ◽  
Vol 6 (21) ◽  
pp. 12890-12897 ◽  
Author(s):  
Roisin A. Kelly ◽  
Justin D. Holmes ◽  
Nikolay Petkov
Keyword(s):  
Ion Irradiation ◽  
Ion Beam ◽  
Structural Transformations ◽  
Subsequent Annealing ◽  
Beam Irradiation ◽  
Ion Beam Irradiation ◽  
Germanium Nanowires

A correlative approach to observe discrete structural transformations incurring in one and the same Ge nanowire upon ion irradiation and subsequent in situ annealing.

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