Ion-atom excitation at high and intermediate energies

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Exact post and prior impulse approximation cross sections are calculated for the excitation process H++H (1s to n=2). The results show a large post-prior discrepancy and a huge disagreement with the experiments, even at energies where the simple Born approximation already works. Following a previous...

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Detalles Bibliográficos
Autor principal: Rodriguez, V.D
Otros Autores: Miraglia, Jorge Esteban
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 1990
Acceso en línea:Registro en Scopus
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Biblioteca Central Dr. Luis F. Leloir (FCEN) de Universidad de Buenos Aires
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100 1 |a Rodriguez, V.D. 
245 1 0 |a Ion-atom excitation at high and intermediate energies 
260 |c 1990 
504 |a Ast, H., Ludde, H.J., Dreizler, R.M., (1988) J. Phys. B: At. Mol. Opt. Phys., 21, p. 4143 
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504 |a Grün, N., (1987) Int. Conf. on the Physics of Electronic and Atomic Collisions (Brighton), p. 345. , H B Gilbody, et al (Amsterdam: North-Holland) 
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504 |a Park, J.T., (1983) Adv. At. Mol. Phys., 19, p. 67 
504 |a Park, J.T., Aldag, J.E., George, J.M., Peacher, J.L., (1976) Phys. Rev., 14, p. 608 
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504 |a Reinhold, C.O., Miraglia, J.E., (1987) J. Phys. B: At. Mol. Phys., 20, p. 1069 
504 |a Reinhold, C.O., Falcon, C.A., Miraglia, J.E., (1987) J. Phys. B: At. Mol. Phys., 20, p. 3737 
504 |a Reymann, K., Schartner, K.H., Sommer, B., Trabert, E., (1988) Phys. Rev., 38, p. 2290 
504 |a Rodríguez, V.D., Miraglia, J.E., (1989) Phys. Rev., 39, p. 6594 
504 |a Rodríguez, V.D., Miraglia, J.E., (1989) Phys. Lett., 137A, p. 123 
504 |a Rodríguez, V.D., Miraglia, J.E., (1989) Proc. 16th Int. Conf., p. 490. , on the Physics of Electronic and Atomic Collisions (New York) (Amsterdam: North-Holland) 
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506 |2 openaire  |e Política editorial 
520 3 |a Exact post and prior impulse approximation cross sections are calculated for the excitation process H++H (1s to n=2). The results show a large post-prior discrepancy and a huge disagreement with the experiments, even at energies where the simple Born approximation already works. Following a previous work along this line, the authors show that the theory remarkably improves when the correct asymptotic conditions are observed by including eikonal phases. This new approximation, called the eikonal impulse approximation, presents a negligible prior-post discrepancy at high energies and the prior version produces very good agreement with the experiments. Departure of the total excitation cross section from the quadratic law on the projectile charge (saturation) is discussed and compared with the available data. Scaling laws, alignment factors and s-p coherences are reported and compared with previous results. © 1990, IOP Publishing Ltd.  |l eng 
593 |a Instituto de Astronomia y Fisica del Espacio, Consejo Nacional de Investigaciones Cientificas y TCcnicas from Argentina, Casilla de Correos 67, Sucursal 28, 1428, United States 
690 1 0 |a CROSS SECTION 
690 1 0 |a EIKONAL 
690 1 0 |a EXCITATION CROSS SECTION 
690 1 0 |a EXCITATION PROCESS 
690 1 0 |a HIGH ENERGY 
690 1 0 |a IMPULSE APPROXIMATION 
690 1 0 |a INTERMEDIATE ENERGIES 
690 1 0 |a ION-ATOM 
690 1 0 |a PROJECTILE CHARGE 
690 1 0 |a BORN APPROXIMATION 
690 1 0 |a EXPERIMENTS 
700 1 |a Miraglia, Jorge Esteban 
773 0 |d 1990  |g v. 23  |h pp. 3629-3642  |k n. 20  |p J Phys B At Mol Opt Phys  |x 09534075  |w (AR-BaUEN)CENRE-332  |t Journal of Physics B: Atomic, Molecular and Optical Physics 
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856 4 0 |u https://doi.org/10.1088/0953-4075/23/20/022  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_09534075_v23_n20_p3629_Rodriguez  |y Handle 
856 4 0 |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09534075_v23_n20_p3629_Rodriguez  |y Registro en la Biblioteca Digital 
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963 |a VARI 
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