```
Mohamed, A. S., E-mail: asalah@ksu.edu.sa, Al-Azhar University, Cairo, Nasr City, and Nikitin, S. I., E-mail: dept.kpme@unecon.ru.
```*Collective motion of two-electron atom in hyperspherical adiabatic approximation*. United States: N. p., 2015.
Web. doi:10.1063/1.4914263.

```
Mohamed, A. S., E-mail: asalah@ksu.edu.sa, Al-Azhar University, Cairo, Nasr City, & Nikitin, S. I., E-mail: dept.kpme@unecon.ru.
```*Collective motion of two-electron atom in hyperspherical adiabatic approximation*. United States. doi:10.1063/1.4914263.

```
Mohamed, A. S., E-mail: asalah@ksu.edu.sa, Al-Azhar University, Cairo, Nasr City, and Nikitin, S. I., E-mail: dept.kpme@unecon.ru. 2015.
"Collective motion of two-electron atom in hyperspherical adiabatic approximation". United States.
doi:10.1063/1.4914263.
```

```
@article{osti_22391321,
```

title = {Collective motion of two-electron atom in hyperspherical adiabatic approximation},

author = {Mohamed, A. S., E-mail: asalah@ksu.edu.sa and Al-Azhar University, Cairo, Nasr City and Nikitin, S. I., E-mail: dept.kpme@unecon.ru},

abstractNote = {This work is devoted to calculate bound states in the two-electron atoms. The separation of variables has carried out in hyper spherical coordinate system (R, θ, α). Assuming collective motion of the electrons, where the hper angle (α∼π/4) and (θ∼π). The separation of the rotational variables leads to system of differential equations with more simple form as compared with non restricted motion. Energy of doubly excited P{sup e} and D{sup 0} states are calculated semi classically by using quantization condition of Bohr -Somerfield. The results compared with previously published data.},

doi = {10.1063/1.4914263},

journal = {AIP Conference Proceedings},

number = 1,

volume = 1653,

place = {United States},

year = 2015,

month = 3

}