Positron scattering and ionization of neon atoms —— theoretical investigations

doi:10.1088/1674-1056/19/10/103402

Abstract Although positron scattering with inert gas atoms has been studied in theory as well as in experiment, there are discrepancies. The present work reports all the major total cross sections of e⁺–neon scattering at incident energies above ionization threshold, originating from a complex potential formalism. Elastic and cumulative inelastic scatterings are treated in the complex spherical e⁺–atom potential. Our total inelastic cross section includes positronium formation together with ionization and excitation channels in Ne. Because of the Ps formation channel it is difficult to separate out ionization cross sections from the total inelastic cross sections. An approximate method similar to electron–atom scattering has been applied to bifurcate ionization and cumulative excitation cross sections at energies from threshold to 2000 eV. Comparisons of present results with available data are made. An important outcome of this work is the relative contribution of different scattering processes, which we have shown by a bar-chart at the ionization peak.

Keywords: ionization cross sections positron scattering complex potential total cross sections

Received: 29 December 2009
Revised: 18 March 2010
Accepted manuscript online:

PACS:	32.80.Fb	(Photoionization of atoms and ions)
	34.80.Uv	(Positron scattering)

Fund: Project supported by ISRO Bangalore–India for a Research Project (Grant No. RES/2/356/08-09), and UGC, New Delhi for Meritorious Research Fellowship through Sardar Patel University, Vallabh Vidyanagar, India.

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Harshit N. Kothari and K. N. Joshipura Positron scattering and ionization of neon atoms —— theoretical investigations 2010 Chin. Phys. B 19 103402

[1]	Marler J P, Sullivan J P and Surko C M 2005 Phys. Rev. A 71 022701
[2]	Kauppila W E, Stein T S, Smart J H, Dababneh M S, Ho Y K, Downing J P and Pol V 1981 Phys. Rev. A 24 725
[3]	Tsai J S, Lebow L and Paul D A L 1976 Can. J. Phys. 54 1741
[4]	Griffith T C, Heyland G R, Lines K R and Twomey T R 1979 Appl. Phys. 19 431
[5]	Brenton A G, Dutton J and Harris F M 1978 J. Phys. B 11 L15
[6]	Coleman P G, Griffith T C, Heyland G R and Twomey T R 1976 it Appl. Phys. 11 321
[7]	Dewangan D P and Walters H R J 1977 J. Phys. B 10 637
[8]	Parcell L A, McEachran R P and Stauffer A D 2000 Nucl. Instrum. Methods B 171 113
[9]	Campeanu R I, McEachran R P and Stauffer A D 2001 Can. J. Phys. 79 1231
[10]	Reid D D and Wadehra J M 1996 J. Phys. B 29 L127
[11]	Baluja K L and Jain A 1992 Phys. Rev. A 46 1279
[12]	Laricchia G, Reeth P Van, Szluinska M and Moxom J 2002 it J. Phys. B 35 2525
[13]	Bluhme H, Knudsen H, Merrison J P and Nielsen K A 1999 J. Phys. B 32 5835
[14]	Knudsen H, Brun-Nielsen L, Charlton M and Poulsen M R 1990 J. Phys. B 23 3955
[15]	Jacobsen F M, Frandsen N P, Knudsen H, Mikkelsen U and Schrader D M 1995 J. Phys. B 28 4691
[16]	Kara V, Paludan K, Moxom J, Ashley P and Laricchia G 1997 J. Phys. B 30 3933
[17]	Mori S and Sueoka O 1994 J. Phys. B 27 4349
[18]	Joshipura K N, Gangopadhyay S S, Kothari H N and Shelat F A 2009 it Phys. Lett. A 373 2876
[19]	Joshipura K N, Vaishnav B G and Gangopadhyay Sumona 2007 it Int. J. Mass Spectrom. 261 146
[20]	Joshipura K N, Vinodkumar M, Limbachiya C G and Antony B K 2004 it Phys. Rev. A 69 022705
[21]	Bunge C F and Barrientos J A 1993 Atomic Data and Nuclear Data Tables 53 113
[22]	Calogero F 1967 Variable Phase Approach to Potential Scattering (New York and London: Academic Press)
[23]	Lide D R 2003 CRC Handbook of Chemistry and Physics (Boca Raton FL: CRC Press LLC)
[24]	Kothari Harshit N and Joshipura K N 2009 Prajna J. Pure and Appl. Sci. (SPU India) 17 185
[25]	Krishnakumar E and Srivastava S K 1988 J. Phys. B 21 1055
[26]	Rapp D and Englander Golden P 1965 J. Chem. Phys. 43 1464
[27]	Raith W 1998 in Photonic, Electronic and Atomic Collisions, Proc. XX ICPEAC 1997 Austria ed. Aumayr F and Winter H (Singapore: World Scientific) p. 341

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