the effect of interactions of various ia and iia cations with two positions of the adenine-thymine (a−t) and guanine-cytosine (g−c) base pairs on the geometries and individual hydrogen bond (hb) energies have been investigated by using the atoms in molecules (aim) method at the b3lyp/6-311++g(d,p) level of theory. the cations that possess higher charge/radius (q/rad) ratio make higher changes o...

The reconstruction of low-mass vector mesons (ρ, ω, φ) emitted out of the hot and dense phase of relativistic heavy ion collisions is one of the experimental goals of the CBM experiment. In this contribution the status on feasibility studies for their measurement will be summarized. Dominant background sources are random combinations of e− and e from π-Dalitz decay and γ conversion, the latter ...

We have studied the electron pair emission process from a Cu(111) surface excited by primary or photon beam. Although energy was 30 eV beam had an of 25 eV. will discuss and momentum distributions. The experiments with demonstrate that contributions Shockley state can be clearly identified. This is not case for work photons which we ascribe to low spectral weight contribution two electrons comp...

A modification of the variational configuration interaction functional in the first-order interacting space for molecular electronic structure is presented. The modified functional is a fully linked expression that by construction is extensive and invariant to transformations of the underlying orbital basis and is exact for an ensemble of separated two-electron subsystems. In addition, an appro...