The Coulomb explosion of molecular ions in channeling conditions

Khodyrev, V.A.; Kulikauskas, V. S.; Yang, Chaowen

doi:10.1016/s0168-583x(02)01105-9

Cited by 18 publications

(10 citation statements)

References 16 publications

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“…The correct fitting between simulated and experimental data in the case of the atomic beams, Q ␣ Q ␤ = 0, also implies that the model used, which does not take into account any charge exchange process, is valid in the bulk region selected for the study, as proven also in Ref. 41. Evidently, the same value of A 0 was also used for all the molecular ion cases, Q ␣ Q ␤ 0, but in this case, Q ␣ Q ␤ was varied independently for all the possible combinations of the ionization states of the C 2 + molecule: from Q ␣ Q ␤ =1 to Q ␣ Q ␤ = 36.…”

Section: B Validation Of the Monte Carlo Simulationsmentioning

confidence: 74%

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Coulomb explosion as a probe to understand the mechanism of electron stripping from ions interacting with crystalline solids

2009

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When an ion impinges on a solid, it rapidly undergoes a process in which its electrons are stripped away provided the velocity of the orbiting electrons is smaller than the projectile speed. Electron stripping determines any posterior behavior of the ions in the solid, and it is assumed that it takes place on the surface of the solid, but no information is available on the details of the process. Here we show, using the Coulomb explosion of C 2 + ions moving in Si as a tool, that electron stripping takes place in an orderly manner and that the number of electrons stripped, before charge equilibration, depends on a characteristic length. We also propose a relation capable of quantifying this dependence. We foresee these results as a starting point to a more general understanding of ion-solid interaction, with important consequences on ion beam analysis and modification techniques, and special significance in silicon technology.

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Section: B Validation Of the Monte Carlo Simulationsmentioning

confidence: 74%

“…41 To simulate the ion flux behavior in channeling and in random configuration for atomic ions, the Coulomb interaction was set to zero. Thus Q ␣ Q ␤ = 0, where Q is the charge of atom of a molecular ion.…”

Section: B Validation Of the Monte Carlo Simulationsmentioning

confidence: 99%

Coulomb explosion as a probe to understand the mechanism of electron stripping from ions interacting with crystalline solids

2009

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“…However, the computer simulations employed in such study strongly overestimated the experimental results. (Khodyrev et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Coulomb Heating Behaviour of Fast Light Diclusters in Si<100> Direction

Fadanelli¹,

Behar²,

Dias³

2012

Ion Implantation

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“…More recently, new backscattering results interpreted in terms of computer simulations allowed a better understanding of the consequences due to the Coulomb explosion of molecules under channeling conditions. 7 Moreover, a refined experiment combining the detection of both x-rays and backscattered particles from crystal Si allowed a quantitative measure of the transversal Coulomb heating energy. 8 These results showed that this energy, for the cases of H 2 + and H 3 + traveling along the Si͗100͘ channel at 150 kev/ amu, amounts to 2.6± 0.6 eV and 5.1± 0.8 eV respectively, which are compatible with the potential energy stored per particle in the molecule.…”

Section: Introductionmentioning

confidence: 99%

Interplay between the Coulomb explosion and vicinage effects studied usingH2+molecules under channeling conditions

et al. 2006

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The aim of this work is to investigate how the mean energy loss and straggling due to H 2 + molecules interacting with silicon are affected by the Coulomb explosion and vicinage effects. To that end, a SIMOX-type sample made up of 18 O and with an appropriate 18 O marker grown over the surface of crystalline Si was employed, allowing to carry out the measurements through the 18 O͑p , ␣͒ 15 N resonant reaction at 151.2 keV under channeling and random directions. The results show that the mean energy loss associated with the Coulomb explosion and vicinage effects are similar and amount each to about 2% of the total mean energy loss. The comparison of the energy straggling obtained for molecular beams at random and the well-aligned ͗100͘ direction shows a larger value for the aligned case, which is interpreted as a result of the Coulomb explosion along the channel direction. The experimental results are also discussed in terms of Monte Carlo simulations.

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The Coulomb explosion of molecular ions in channeling conditions

Cited by 18 publications

References 16 publications

Coulomb explosion as a probe to understand the mechanism of electron stripping from ions interacting with crystalline solids

Coulomb explosion as a probe to understand the mechanism of electron stripping from ions interacting with crystalline solids

Coulomb Heating Behaviour of Fast Light Diclusters in Si<100> Direction

Interplay between the Coulomb explosion and vicinage effects studied usingH2+molecules under channeling conditions

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