Low Energy Scattering Of Positrons By H2 O

We present a theoretical investigation on elastic positron-H2 O collisions. More specifically, differential and integral cross sections in the 0-10 eV energy range are reported. The calculations were performed using two theoretical approaches, namely, the Schwinger multichannel method and the method of continued fractions. The positron-molecule interaction dynamics is described by using a potential composed of static and correlation-polarization contributions. Comparison of our calculated results with the recent experimental of Zecca et al. [J. Phys. B 39 (2006) 1597] and theoretical results is encouraging. © 2009 Elsevier B.V. All rights reserved.2682178182Sweet, W.H., (1951) New Eng. J. Med., 245, p. 875Brownell, G.L., Sweet, W.H., (1953) Nucleonics, 11, p. 40Champion, C., Le Loirec, C., (2006) Phys. Med. Biol., 51, p. 1707Sueoka, O., Mori, S., Katayama, Y., (1986) J. Phys. B: At. Mol. Phys., 19, pp. L373Kimura, M., Sueoka, O., Hamada, A., Itikawa, Y., (2000) Adv. Chem. Phys., 111, p. 537Zecca, A., Sanyal, D., Chakrabarti, M., Brunger, M.J., (2006) J. Phys. B: At. Mol. Opt. Phys., 39, p. 1597Beale, J., Armitage, S., Laricchia, G., (2006) J. Phys. B: At. Mol. Opt. Phys., 39, p. 1337Baluja, K.L., Jain, A., (1992) Phys. Rev. A, 45, p. 7838Gianturco, F.A., Muherjee, T., Occhigrossi, A., (2001) Phys. Rev. A, 64, p. 032715Baluja, K.L., Zhang, R., Franz, J., Tennyson, J., (2007) J. Phys. B: At. Mol. Opt. Phys., 40, p. 3515Arretche, F., Mazon, K.T., Michelin, S.E., Lee, M.-T., Lima, M.A.P., (2008) Phys. Rev. A, 77, p. 042708Germano, J.S.E., Lima, M.A.P., (1993) Phys. Rev. A, 47, p. 3976Horácek, J., Sasakawa, T., (1983) Phys. Rev. A, 28, p. 2151Lee, M.-T., Iga, I., Fujimoto, M.M., Lara, O., (1995) J. Phys. B: At. Mol. Opt. Phys., 28, p. 3325Mazon, K.T., Fujiwara, R., Lee, M.-T., (2001) Phys. Rev. A, 64, p. 042705Murtagh, D.J., Arcidiacono, C., Peŝić, Z.D., Laricchia, G., (2006) Nucl. Instr. Methods Phys. B, 247, p. 92Winstead, C., McKoy, V., (1999) Phys. Rev. A, 57, p. 3589Lengsfield, B.H., Rescigno, T.N., McCurdy, C.W., (1991) Phys. Rev. A, 44, p. 4296Horácek, J., Sasakawa, T., (1985) Phys. Rev. C, 32, p. 70Makowiski, A.J., Raczyński, A., Staszewska, G., (1986) Phys. Rev. A, 33, p. 733Makowiski, A.J., Raczyński, A., Staszewska, G., (1986) J. Phys. B: At. Mol. Opt. Phys., 19, p. 3367Lee, M.-T., Iga, I., Fujimoto, M.M., Lara, O., (1995) J. Phys. B: At. Mol. Opt. Phys., 28, pp. L299Lee, M.-T., Fujimoto, M.M., Iga, I., (1997) J. Mol. Struct. (Theochem), 394, p. 117Lee, M.-T., Fujimoto, M.M., Iga, I., (1998) J. Mol. Struct. (Theochem), 432, p. 197Machado, A.M., Lee, M.-T., (1995) J. Phys. B: At. Mol. Opt. Phys., 32, pp. L299Ribeiro, E.M.S., Machado, L.E., Lee, M.-T., Brescansin, L.M., (2001) Comput. Phys. Commun., 136, p. 117Arretche, F., Mazon, K.T., Michelin, S.E., Lee, M.-T., Iga, I., Fujimoto, M.M., (2008) Nucl. Instr. Meth. Phys. Res. Sec. B, 266, p. 441Gil, T.J., Rescigno, T.N., McCurdy, C.W., Lengsfield III, B.H., (1994) Phys. Rev. A, 49, p. 2642Poirier, R., Kari, R., Csizmadia, G., (1995) Handbook of Guassian Basis Sets, , Elsevier Science, Publishers, B.VHerzberg, G., Spectra, M., Structure, M., (1967) Electronic Spectra and Electronic Structure of Polyatomic Molecules, III. , Van Nostrand, New YorkMachado, L.E., Brescansin, L.M., Iga, I., Lee, M.-T., (2005) Eur. Phys. J. D, 33, p. 193Rescigno, T.N., Orel, A.E., Hase, A.U., McKoy, B.V., (1982) Phys. Rev. A, 26, p. 69