R-matrix study of elastic and inelastic electron collisions with cytosine and thymine
R-matrix study of elastic and inelastic electron collisions with cytosine and thymine
复制标题
弹性和非弹性电子与胞嘧啶和胸腺嘧啶碰撞的 R 矩阵研究
DOI:
10.1088/0953-4075/45/17/175203
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Dora A
中科院分区:
文献类型:
--
作者:
Dora A
Ab initio scattering calculations for low-energy electron collisions with gas-phase DNA pyrimidine bases (cytosine and thymine) are performed using the R-matrix method. The low-lying resonant states of the anions, formed due to electron capture by the bases, are identified using different levels of theory, including static exchange, static exchange plus polarization, and close-coupling approximations. For both the bases, all of our scattering models find three shape resonances of 2 A''(π) symmetry lying below 10 eV, in accordance with other calculations and experimental observations. In addition to these, a fourth 2 A''resonance is found in all models for thymine and in our best model, ie the uncontracted close-coupling approximation, for cytosine. This model places the fourth 2 A''resonance in both systems in the 6–7 eV range. No evidence is found for the presence of low-lying Feshbach resonances in either system. Integral cross sections for electronically elastic and inelastic collisions are also presented.
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影响因子:
8.6
作者:
A. Scheer;K. Aflatooni;G. Gallup;P. Burrow
通讯作者:
P. Burrow
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
A. Scheer;C. Silvernail;J. Belot;K. Aflatooni;G. Gallup;P. Burrow
通讯作者:
P. Burrow
影响因子:
1.8
作者:
Carr, J. M.;Galiatsatos, P. G.;Varambhia, H. N.
通讯作者:
Varambhia, H. N.
影响因子:
2.8
作者:
Abouaf, R;Pommier, J;Dunet, H
通讯作者:
Dunet, H