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We present the theoretical energy values and the transition probabilities for a series of singly and doubly excited states below the first ionization threshold of the Be-like N IV ion calculated in a simple nonrelativistic configuration-interaction procedure using a finite L 2-basis set constructed ...
The first ionization energies of the elements ___ as you go from left to right across a period of the periodic table, and ___ as you go from the bottom to the top of a group in the table... A. decrease, decrease B. increase, increase C. are completely unpredictable D. ...
Free energy barrier in the growth of sulfuric acid-ammonia and sulfuric acid-dimethylamine clusters The first step in atmospheric new particle formation involves the aggregation of gas phase molecules into small molecular clusters that can grow by collidi... T Olenius,Kupiainen-Ma?a?tta?, O.,...
We use first-order perturbation theory to obtain intermediate coupling coefficients and second-order MBPT to determine matrix elements. The transition energies used to evaluate transition probabilities are also obtained from second-order MBPT. The importance of negative-energy contributions to the ...
In the second method the detachment energy is calculated directly. The first method gives good agreement with experiment but it is found that, if diagrams are included in a balanced manner, the second method seems more attractive. We have also studied the geometrical properties of the two outer...
The contributions from the diagrams of the first two orders are calculated for the energy of the ground state of Be. The result is E 2 = =−1.25 Z 2 +1.55927422 Z−0.8775, with E 2 corr =−0.01172683 Z −0.0720. Perturbation theories for the ground-state energy of Be are compar...
When 8 years old the father has given his life first hemp smoke, in the entire young people time, he and his family members all is abusing the hemp and the cocaine.In 1996, because has the narcotics, drives under the narcotic function private rushes the residents, the illegal carryhome fi...
Yadav A (2022) Monolayered carbides of main group elements (Si, Ge, Sn and Pb) for NO2 gas sensing: insights from first-principle studies. Silicon 14:12683–12692. https://doi.org/10.1007/s12633-022-01987-y Article CAS Google Scholar Sainda R, Chodvadiya D, Jha PK (2024) A DFT...
First-principles calculations for slabs as many as 13 layers thick show that the three surface core-level features observed on Be(0001) correspond to core-electron ionizations in its three outermost atomic layers. The calculations also imply that the experimental peak identified with core ionization...