State selective electron capture in partially stripped ion-atom interaction at intermediate and high energies

Sounda, S.; Dhara, Anamika; Purkait, M.; Mandal, Chittaranjan

doi:10.1140/epjd/e2006-00008-4

Cited by 16 publications

(11 citation statements)

References 38 publications

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“…The calculated energies of the 4l and 5l excited states of O 5+ have accuracy better than 0.1%, except for the 4s, 4p and 5p states for which it amounts to 0.3%, 0.8% and 0.8%, respectively. The model potentials used in [15,20,21,23,24] were also taken in the form of equations ( 1), (2), i.e. as V A q+ (r) = −q/r-2(1+br) e −αr /r.…”

Section: The Model Potentialsmentioning

confidence: 99%

“…as V A q+ (r) = −q/r-2(1+br) e −αr /r. The parameters α and b in [15,20,21] have respectively the values 10.001 and 5.0005 for N 5+ and 12.181 and 6.0905 for O 6+ , while in [23,24] they are 9.0074 and 4.9066 for N 5+ . In all of these references it is claimed that the excited state energies of the ion obtained by the corresponding model potential agree well with the experimental energies.…”

Section: The Model Potentialsmentioning

confidence: 99%

“…On the theoretical side, cross-section calculations for the N 5+ -H charge exchange collisions have been carried out in the low-energy region (below 25 keV u −1 ) by the perturbed stationary-state (PSS) method [18] and the semiclassical molecular orbital close-coupling (MOCC) method [15,[19][20][21][22]. In the intermediate and high energy regions (above 25 keV u −1 ) such calculations have been performed by the classical trajectory Monte Carlo (CTMC) method [18,23] and by the boundary corrected continuum intermediate state (BCCIS) method [24] (above 50 keV u −1 ). Theoretical cross sections for the state-selective electron capture in this collision system have been reported only in [21,22] for the energy ranges 0.9-7.3 and 0.1-10 keV u −1 , respectively.…”

Section: Introductionmentioning

confidence: 99%

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State-selective electron capture in N⁵⁺-H and O⁶⁺-H collisions

Liu

Wang

Janev

2011

J. Phys. B: At. Mol. Opt. Phys.

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The two-centre atomic orbital close-coupling method is employed to study the electron capture reactions in collisions of N 5+ and O 6+ ions with ground state atomic hydrogen in the energy range from 0.5 to 200 keV u −1 . The interaction of an active electron with the projectile ion is represented by a model potential. Total and state-selective electron capture cross sections for the dominant and subdominant reaction channels are calculated and compared with the available experimental and theoretical data.

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Section: The Model Potentialsmentioning

confidence: 99%

Section: The Model Potentialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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State-selective electron capture in N⁵⁺-H and O⁶⁺-H collisions

Liu

Wang

Janev

2011

J. Phys. B: At. Mol. Opt. Phys.

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“…Two main processes which contribute to the single electron loss from atomic/molecular targets are the electron capture and the electron ionization dominating at low and high impact velocities, respectively. In this paper, studies have been made on the single-electron capture from biological molecules by fast bare ions in the energy range of 25-10,000 keV/amu using the boundary corrected continuum intermediate state approximation (BCCIS) [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…Resulting in finding the computed results in satisfactory agreement with the experimental data. Success of the BCCIS approximation [20][21][22][47][48][49], motivated us to study the single-charge transfer cross sections from molecular targets N 2 , O 2 , CH 4 , CO, CO 2 and H 2 O interacting H + , He 2+ and Li 3+ ion beams with energies ranging from 25 to 10,000 keV/amu. The results are thoroughly compared with the existing experimental and other theoretical data.…”

Section: Introductionmentioning

confidence: 99%

Electron-capture Process Induced by Bare Ion Impact on Biological Targets

Samaddar¹,

Purkait²,

Halder³

et al. 2019

JEPE

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Within the framework of independent electron approach, the prior form of boundary corrected continuum intermediate state (BCCIS) approximation is employed to calculate the cross sections for total single electron capture in collision of bare ions (H + , He 2+ and Li 3+ ) with biological molecules in the intermediate to high energy regimes. With a suitable choice of the distorting potential, the boundary condition is satisfied with a proper account of the intermediate continuum states. The cross sections have been calculated from 25 keV/amu to 10 MeV/amu. We have approximated the cross sections for molecular targets by the linear combination of atomic cross sections weighted by the effective occupation electron number. Furthermore, the multi-electronic problem is reduced to a mono-electronic one using a version of the independent electron approximation. A detailed analysis on the contributions from different molecular orbitals to total cross sections is reported. In the present investigation, we observe clearly the importance of the core contribution in the change of slope of the TCS curves. Moreover, analysis has been made on the cross section per target electron resulting in achievement of a 'universal' cross section. However, some negligible discrepancies are observed for the case of the CH 4 molecule. The present computed results in prior from of BCCIS method have been compared with the available theoretical and experimental results. We found that our computed results are in good agreement with the experimental findings.

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