scholarly journals Localized thermal spike driven morphology and electronic structure transformation in swift heavy ion irradiated TiO2 nanorods

2021 ◽  
Author(s):  
Sutapa Dey ◽  
Anusmita Chakravorty ◽  
Shashi Bhusan Mishra ◽  
Nasima Khatun ◽  
Arnab Hazra ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Physicochemical Properties ◽  
Heavy Ion ◽  
High Energy ◽  
Tio2 Nanorods ◽  
Electronic Excitations ◽  
Structure Transformation ◽  
Thermal Spike ◽  
Swift Heavy Ion ◽  
High Energy Ions

Irradiation of materials by high energy ions (~MeV) causes intense electronic excitations through inelastic transfer of energy that significantly modifies physicochemical properties. We report the effect of 100 MeV Ag...

scholarly journals “Thermal Spike” model applied to thin targets irradiated with swift heavy ion beams at few MeV/u

2020 ◽  
Vol 229 ◽  
pp. 05001
Author(s):  
Christelle Stodel ◽  
Marcel Toulemonde ◽  
Christoph Fransen ◽  
Bertrand Jacquot ◽  
Emmanuel Clément ◽  
...  
Keyword(s):  
Nuclear Physics ◽  
Dominant Role ◽  
Heavy Ion ◽  
Ion Beams ◽  
Electronic Excitations ◽  
Thermal Spike ◽  
Experimental Conditions ◽  
Thermal Spike Model ◽  
Spike Model ◽  
Swift Heavy Ion

High electronic excitations in radiation of metallic targets with swift heavy ion beams at the coulomb barrier play a dominant role in the damaging processes of some metals. The inelastic thermal spike model was developed to describe tracks in materials and is applied in this paper to some systems beams/targets employed recently in some nuclear physics experiments. Taking into account the experimental conditions and the approved electron-phonon coupling factors, the results of the calculation enable to interpret the observation of the fast deformation of some targets.

Modification of Barium Cerate by Heavy Ion Irradiation

2013 ◽  
Vol 781-784 ◽  
pp. 357-361 ◽  
Author(s):  
Igor V. Khromushin ◽  
Taтiana I. Aksenova ◽  
Turgora Tuseyev ◽  
Karlygash K. Munasbaeva ◽  
Yuri V. Ermolaev ◽  
...  
Keyword(s):  
Structural Changes ◽  
Solid Phase ◽  
Ion Irradiation ◽  
Heavy Ion ◽  
High Energy ◽  
Low Energy ◽  
Barium Cerate ◽  
Weakly Bound ◽  
Ion Ranges ◽  
High Energy Ions

The effect of irradiation with heavy ions Ne, Ar, and Kr of various energies on the structure and properties of ceramic barium cerate doped with neodymium and annealed in air at 650°C for 7 hours is studied. It is noted that blistering was observed on cerate surface during its irradiation by low energy Ne ions, whereas it was not observed under low-energy Ar and Kr ions irradiation. Irradiation of the cerate with high energy ions caused partial amorphization of the irradiated surface of the material, while the structure of the non-irradiated surface did not change. In addition, the irradiated surface of the cerate endured solid-phase structural changes. Thus, upon high-energy ions irradiation in the range of Ne, Ar, Kr the cerate surface resembled the stages of spherulite formation - nucleation, growth (view of cauliflower), formation of spherulitic crust, respectively. The increase in water molecules release and reduction of molecular oxygen release from the barium cerate, irradiated by high-energy ions is found during vacuum constant rate heating. It is concluded that cerates undergo changes to the distances significantly exceeding the ion ranges in these materials. Features of high-energy ions influence on thermal desorption of carbon dioxide from cerates show, apparently, the formation of weakly bound carbonate compounds on the cerate surface in the irradiation process.

The Effect of Swift Heavy Ion Irradiation on Quasicrystals

2000 ◽  
Vol 643 ◽  
Author(s):  
Ratnamala Chatterjee ◽  
Aloke Kanjilal ◽  
A. Dunlop
Keyword(s):  
Ion Irradiation ◽  
Heavy Ion ◽  
Ex Situ ◽  
Stopping Power ◽  
Icosahedral Quasicrystal ◽  
Electronic Excitations ◽  
Nuclear Collisions ◽  
Heavy Ion Irradiation ◽  
Swift Heavy Ion ◽  
Ex Situ Xrd

AbstractThe effect of pure electronic excitations (by ∼ 835 MeV Kr irradiation) on a stable icosahedral quasicrystal is compared with the effect of electronic excitations combined with the nuclear collisions (by 100 MeV Ni irradiation) occurring in a similar quasicrystal. The critical stopping power was kept at 1300 eV/Å for both the experiments. Under the pure electronic excitations, the R(φ)/R(0) [ratio of resistance at fluence φ and the resistance on the same piece with zero fluence) of quasicrystal goes through oscillatory changes, until at ∼ 1 × 1012 ions/cm2where this ratio drops considerably. The ex-situ XRD on the irradiated sample does show the evidence of degradation of the structure. In contrast, the Ni- irradiated sample shows an increase in resistivity after a critical fluence of 2.5 × 1013 ions/cm2, which remains constant for higher fluences. Corresponding defect annihilation effects are observed in the XRD of Ni- irradiated samples.

The Thermal Spike Model: A Possible Way to Describe the Effects Induced in Y2O3 by Swift Heavy Ion Irradiations

1997 ◽  
Vol 248-249 ◽  
pp. 21-32 ◽  
Author(s):  
C. Dufour ◽  
S. Hemon ◽  
F. Gourbilleau ◽  
E. Paumier ◽  
E. Dooryhee
Keyword(s):  
Heavy Ion ◽  
Thermal Spike ◽  
Thermal Spike Model ◽  
Spike Model ◽  
Swift Heavy Ion

Thermophysical behavior of boron nitride and boron trioxide ceramics compounds with high energy electron fluence and swift heavy ion irradiated

2020 ◽  
Vol 834 ◽  
pp. 155119 ◽  
Author(s):  
Matlab N. Mirzayev ◽  
E. Popov ◽  
E. Demir ◽  
B.A. Abdurakhimov ◽  
D.M. Mirzayeva ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Heavy Ion ◽  
High Energy ◽  
Energy Electron ◽  
High Energy Electron ◽  
Boron Trioxide ◽  
Swift Heavy Ion

scholarly journals High energy swift heavy ion irradiation and annealing effects on DC electrical characteristics of 200 GHz SiGe HBTs

2019 ◽  
Vol 51 (5) ◽  
pp. 1428-1435
Author(s):  
Vinayakprasanna N. Hegde ◽  
K.C. Praveen ◽  
T.M. Pradeep ◽  
N. Pushpa ◽  
John D. Cressler ◽  
...  
Keyword(s):  
Ion Irradiation ◽  
Heavy Ion ◽  
High Energy ◽  
Electrical Characteristics ◽  
Swift Heavy Ion Irradiation ◽  
Heavy Ion Irradiation ◽  
Swift Heavy Ion ◽  
Annealing Effects

Regrowth of Ge with different degrees of damage under thermal and athermal treatment

RSC Advances ◽  
2016 ◽  
Vol 6 (6) ◽  
pp. 4576-4586 ◽  
Author(s):  
Sonu Hooda ◽  
B. Satpati ◽  
Tanuj Kumar ◽  
Sunil Ojha ◽  
D. Kanjilal ◽  
...  
Keyword(s):  
Steady State ◽  
Thermal Annealing ◽  
High Energy ◽  
Thermal Spike ◽  
High Energy Ions

In this report, the recrystallization of pre-damaged Ge samples is extensively investigated under steady-state thermal annealing and ultrafast thermal spike-assisted annealing generated by high-energy ions.

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