Double-electron capture as a two-step process
Double-electron capture by the impact of heavy projectiles on heliumlike atoms is studied with a two-electron model. The process is here considered a two-step collision, which in the frame of the distorted-wave formalism is related to the second order. This second order is evaluated by using an on-s...
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| Formato: | Capítulo de libro |
| Lenguaje: | Inglés |
| Publicado: |
1992
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
| LEADER | 06182caa a22006017a 4500 | ||
|---|---|---|---|
| 001 | PAPER-19280 | ||
| 003 | AR-BaUEN | ||
| 005 | 20250804082622.0 | ||
| 008 | 190411s1992 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-0040900426 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a Gravielle, M.S. | |
| 245 | 1 | 0 | |a Double-electron capture as a two-step process |
| 260 | |c 1992 | ||
| 270 | 1 | 0 | |m Gravielle, M.S.; Instituto de Astronomía y Física Del Espacio, Consejo Nacional de Investigaciones Científicas y Técnicas, 1428 Buenos Aires, Argentina |
| 504 | |a Zourus, T.J.M., Schneider, D., Stolterfoht, N., (1987) Phys. Rev. A, 35, p. 1963 | ||
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| 504 | |a Miraglia, J.E., Gravielle, M.S., (1987) Abstracts of Contributed Papers to the 15th International Conference on the Physics of Electronic and Atomic Collisions, Brighton, 1987, p. 521. , edited by, J. Geddes, et al., North-Holland, Amsterdam | ||
| 504 | |a McGuire, J., (private communcation); When using unperturbed Born wave functions in double excitation, Tfi(1) is real and proportional to ZP, and the principal part also being real contributes to the ZP3 terms of the cross section. Since the energy conservation is imaginary, it gives a contribution of the order of ZP4 and is therefore less important than the principal part; Coleman, J.P., (1969) Case Studies in Atomic Collision Physics I, p. 101. , edited by, E. W. McDaniel, M. C. R. McDowell, North-Holland, Amsterdam | ||
| 504 | |a We note that langle ξn|Wi| χi+> = < ξn| H-E| χi+rangle = < ξn| En-E +Vn| χi+rangle, where En is the energy of the intermediate state ξn. Since we are working on-shell, E=En [see Eq. (2.7)]; Clementi, E., Roetti, C., (1974) At. Data Nucl. Data Tables, 14, p. 177 | ||
| 504 | |a Bunge, A.V., Bunge, C.F., Jáuregui, R., Cisneros, G., (1989) Comput. Chem., 13, p. 201 | ||
| 504 | |a Bunge, C.F., Jáuregui, R., Cisneros, G., (1989) Comput. Chem., 13, p. 277 | ||
| 504 | |a McDaniel, E.W., Flannery, M.R., Ellis, H.W., Eisele, F.L., Pope, W., (1977), U.S. Army Missile Research and Development Command Technical; DuBois, R.D., (1987) Phys. Rev. A, 36, p. 2585 | ||
| 504 | |a Freire, F.L., Jr., (1988) Phys. Rev. A, 37, p. 280. , N. V. de Castro Faria, and A. G. de Pinho | ||
| 504 | |a McGuire, J.H., Deb, N.C., Aktas, Y., Sil, N.C., (1988) Phys. Rev. A, 38, p. 3333 | ||
| 504 | |a Fritsch, W., Lin, C.D., (1988) Phys. Rev. Lett., 61, p. 690 | ||
| 504 | |a Meng, L., Reinhold, C.O., (private communication); Note that each contribution should be added coherently; Shah, M.B., Gilbody, H.B., (1985) J. Phys. B, 18, p. 899 | ||
| 504 | |a Hippler, R., Datz, S., Miller, P.D., Pepmiller, P.L., Dittner, P.F., (1987) Phys. Rev. A, 35, p. 585 | ||
| 504 | |a Irby, V., (unpublished). Results provided by C. Reinhold in Ref. [26] | ||
| 506 | |2 openaire |e Política editorial | ||
| 520 | 3 | |a Double-electron capture by the impact of heavy projectiles on heliumlike atoms is studied with a two-electron model. The process is here considered a two-step collision, which in the frame of the distorted-wave formalism is related to the second order. This second order is evaluated by using an on-shell Green function representing one electron in each center, and it is found to be related, after some approximations, to the independent-electron model. In particular, the exact impulse approximation is used to calculate the single-capture T-matrix elements, and the electronic repulsion is included as a dynamic perturbation in first order. A configuration-interaction wave function is employed to describe the ground state of helium for double capture 1s21s2 in a He2+-He collision. For this benchmark, differences with the use of a Hartree-Fock wave function instead are found to be negligible. Thereafter, capture to single excited states for the same system is calculated by using Hartree-Fock and variational electronic wave functions. Also, double capture for multiply charged ions on helium is calculated. Differential cross sections for double-capture He2+-He collisions at 60 keV/amu impact energy are presented and compared with previous experiments. The present theory produces good agreement with the available data. © 1992 The American Physical Society. |l eng | |
| 593 | |a Instituto de Astronomía y Física Del Espacio, Consejo Nacional de Investigaciones Científicas y Técnicas, 1428 Buenos Aires, Argentina | ||
| 700 | 1 | |a Miraglia, Jorge Esteban | |
| 773 | 0 | |d 1992 |g v. 45 |h pp. 2965-2973 |k n. 5 |x 10502947 |t Physical Review A | |
| 856 | 4 | 1 | |u https://www.scopus.com/inward/record.uri?eid=2-s2.0-0040900426&doi=10.1103%2fPhysRevA.45.2965&partnerID=40&md5=30bd97ad6b4d8ccd184a7dc108ecd8c6 |y Registro en Scopus |
| 856 | 4 | 0 | |u https://doi.org/10.1103/PhysRevA.45.2965 |y DOI |
| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_10502947_v45_n5_p2965_Gravielle |y Handle |
| 856 | 4 | 0 | |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v45_n5_p2965_Gravielle |y Registro en la Biblioteca Digital |
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| 962 | |a info:eu-repo/semantics/article |a info:ar-repo/semantics/artículo |b info:eu-repo/semantics/publishedVersion | ||
| 963 | |a VARI | ||
| 999 | |c 80233 | ||