| Journal: | Brazilian journal of physics |
| Database: | PERIÓDICA |
| System number: | 000336869 |
| ISSN: | 0103-9733 |
| Authors: | Abdel-Mageed, Mahasen M1 |
| Institutions: | 1Ain Shams University, Faculty of Sciences, El Cairo. Egipto |
| Year: | 2010 |
| Season: | Mar |
| Volumen: | 40 |
| Number: | 1 |
| Pages: | 9-14 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English abstract | The least-squares variational method (LSVM) is used for determining trial wavefunctions representing lowenergy positron-xenon elastic scattering, which are used to determine the positron lifetime. The trial function is taken to depend on several adjustable parameters, and is improved iteratively by increasing the number of terms. The bound state wavefunctions are obtained using Hartree-Fock-Slater method. The 2g-rays annihilation rates of the positron in xenon atoms below Positronuim (Ps) formation threshold are calculated. Polarization potential Vpl(r) is applied to enhance annihilation rates and lifetime. The present results of annihilation parameters are consistent with semiempirical, theoretical and experimental results |
| Disciplines: | Física y astronomía |
| Keyword: | Física, Aniquilación positrónica, Función de onda, Método variacional |
| Keyword: | Physics and astronomy, Physics, Positron annihilation, Wave function, Variational methods |
| Full text: | Texto completo (Ver PDF) |
