TY  - JOUR
AU  - Majkić, Milena D.
AU  - Nedeljković, Nataša N.
AU  - Dojčilović, Radovan
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1766
AB  - We consider the slow highly charged ions impinging upon a metal surface covered with a thin dielectric film, and formation of the surface nanostructures (craters) from the standpoint of the required energy. For the moderate ionic velocities, the size of the surface features depends on the deposited kinetic energy of the projectile and the ionic neutralization energy. The neutralization energy is calculated by employing the recently developed quasi-resonant two-state vector model for the intermediate Rydberg state population and the micro-staircase model for the cascade neutralization. The electron interactions with the ionic core, polarized dielectric and charge induced on the metal surface are modelled by the appropriate asymptotic expressions and the method for calculation of the effective ionic charges in the dielectric is proposed. The results are presented for the interaction of XeZ+ ions (velocity v = 0.25 a.u.; 25 LT Z LT 45) with the metal surface (Co) covered with a thin dielectric film, for model values of dielectric constant inside the interaction region. In the absence of dielectric film, the neutralization energy is lower than the potential (ionization) energy due to the incomplete neutralization. The presence of dielectric film additionally decreases the neutralization energy. We calculate the projectile neutralization energy in the perturbed dielectric (perturbation is caused by the ionic motion and the surface structure formation). We correlate the neutralization energy added to the deposited kinetic energy with the experimentally obtained energy necessary for the formation of the nano-crater of a given depth.
T2  - Materials Research Express
T1  - Interaction of slow highly charged ions with a metal surface covered with a thin dielectric film. The role of the neutralization energy in the nanostructures formation
VL  - 4
IS  - 9
DO  - 10.1088/2053-1591/aa8bc7
ER  - 

@article{
author = "Majkić, Milena D. and Nedeljković, Nataša N. and Dojčilović, Radovan",
year = "2017",
abstract = "We consider the slow highly charged ions impinging upon a metal surface covered with a thin dielectric film, and formation of the surface nanostructures (craters) from the standpoint of the required energy. For the moderate ionic velocities, the size of the surface features depends on the deposited kinetic energy of the projectile and the ionic neutralization energy. The neutralization energy is calculated by employing the recently developed quasi-resonant two-state vector model for the intermediate Rydberg state population and the micro-staircase model for the cascade neutralization. The electron interactions with the ionic core, polarized dielectric and charge induced on the metal surface are modelled by the appropriate asymptotic expressions and the method for calculation of the effective ionic charges in the dielectric is proposed. The results are presented for the interaction of XeZ+ ions (velocity v = 0.25 a.u.; 25 LT Z LT 45) with the metal surface (Co) covered with a thin dielectric film, for model values of dielectric constant inside the interaction region. In the absence of dielectric film, the neutralization energy is lower than the potential (ionization) energy due to the incomplete neutralization. The presence of dielectric film additionally decreases the neutralization energy. We calculate the projectile neutralization energy in the perturbed dielectric (perturbation is caused by the ionic motion and the surface structure formation). We correlate the neutralization energy added to the deposited kinetic energy with the experimentally obtained energy necessary for the formation of the nano-crater of a given depth.",
journal = "Materials Research Express",
title = "Interaction of slow highly charged ions with a metal surface covered with a thin dielectric film. The role of the neutralization energy in the nanostructures formation",
volume = "4",
number = "9",
doi = "10.1088/2053-1591/aa8bc7"
}

Majkić, M. D., Nedeljković, N. N.,& Dojčilović, R.. (2017). Interaction of slow highly charged ions with a metal surface covered with a thin dielectric film. The role of the neutralization energy in the nanostructures formation. in Materials Research Express, 4(9).
https://doi.org/10.1088/2053-1591/aa8bc7

Majkić MD, Nedeljković NN, Dojčilović R. Interaction of slow highly charged ions with a metal surface covered with a thin dielectric film. The role of the neutralization energy in the nanostructures formation. in Materials Research Express. 2017;4(9).
doi:10.1088/2053-1591/aa8bc7 .

Majkić, Milena D., Nedeljković, Nataša N., Dojčilović, Radovan, "Interaction of slow highly charged ions with a metal surface covered with a thin dielectric film. The role of the neutralization energy in the nanostructures formation" in Materials Research Express, 4, no. 9 (2017),
https://doi.org/10.1088/2053-1591/aa8bc7 . .

TY  - JOUR
AU  - Nedeljković, Nataša N.
AU  - Majkić, Milena D.
AU  - Božanić, Dušan K.
AU  - Dojčilović, Radovan
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1092
AB  - We consider the population dynamics of the intermediate Rydberg states of highly charged ions (core charge Z GT GT 1, principal quantum number n(A) GT GT 1) interacting with solid surfaces at arbitrary collision geometry. The recently developed resonant two-state vector model for the grazing incidence (2012 J. Phys. B: At. Mol. Opt. Phys. 45 215202) is extended to the quasi-resonant case and arbitrary angle of incidence. According to the model, the population probabilities depend both on the projectile parallel and perpendicular velocity components, in a complementary way. A cascade neutralization process for XeZ+ ions, for Z = 15-45, interacting with a conductive-surface is considered by taking into account the population dynamics. For an arbitrary collision geometry and given range of ionic velocities, a micro-staircase model for the simultaneous calculation of the kinetic energy gain and the charge state of the ion in front of the surface is proposed. The relevance of the obtained results for the explanation of the formation of nanostructures on solid surfaces by slow highly charged ions for normal incidence geometry is briefly discussed.
PB  - IOP Publishing
T2  - Journal of Physics. B: Atomic Molecular and Optical Physics
T1  - Dynamics of the Rydberg state population of slow highly charged ions impinging a solid surface at arbitrary collision geometry
VL  - 49
IS  - 12
DO  - 10.1088/0953-4075/49/12/125201
ER  - 

@article{
author = "Nedeljković, Nataša N. and Majkić, Milena D. and Božanić, Dušan K. and Dojčilović, Radovan",
year = "2016",
abstract = "We consider the population dynamics of the intermediate Rydberg states of highly charged ions (core charge Z GT GT 1, principal quantum number n(A) GT GT 1) interacting with solid surfaces at arbitrary collision geometry. The recently developed resonant two-state vector model for the grazing incidence (2012 J. Phys. B: At. Mol. Opt. Phys. 45 215202) is extended to the quasi-resonant case and arbitrary angle of incidence. According to the model, the population probabilities depend both on the projectile parallel and perpendicular velocity components, in a complementary way. A cascade neutralization process for XeZ+ ions, for Z = 15-45, interacting with a conductive-surface is considered by taking into account the population dynamics. For an arbitrary collision geometry and given range of ionic velocities, a micro-staircase model for the simultaneous calculation of the kinetic energy gain and the charge state of the ion in front of the surface is proposed. The relevance of the obtained results for the explanation of the formation of nanostructures on solid surfaces by slow highly charged ions for normal incidence geometry is briefly discussed.",
publisher = "IOP Publishing",
journal = "Journal of Physics. B: Atomic Molecular and Optical Physics",
title = "Dynamics of the Rydberg state population of slow highly charged ions impinging a solid surface at arbitrary collision geometry",
volume = "49",
number = "12",
doi = "10.1088/0953-4075/49/12/125201"
}

Nedeljković, N. N., Majkić, M. D., Božanić, D. K.,& Dojčilović, R.. (2016). Dynamics of the Rydberg state population of slow highly charged ions impinging a solid surface at arbitrary collision geometry. in Journal of Physics. B: Atomic Molecular and Optical Physics
IOP Publishing., 49(12).
https://doi.org/10.1088/0953-4075/49/12/125201

Nedeljković NN, Majkić MD, Božanić DK, Dojčilović R. Dynamics of the Rydberg state population of slow highly charged ions impinging a solid surface at arbitrary collision geometry. in Journal of Physics. B: Atomic Molecular and Optical Physics. 2016;49(12).
doi:10.1088/0953-4075/49/12/125201 .

Nedeljković, Nataša N., Majkić, Milena D., Božanić, Dušan K., Dojčilović, Radovan, "Dynamics of the Rydberg state population of slow highly charged ions impinging a solid surface at arbitrary collision geometry" in Journal of Physics. B: Atomic Molecular and Optical Physics, 49, no. 12 (2016),
https://doi.org/10.1088/0953-4075/49/12/125201 . .