First Born triple differential cross sections (TDCS) for ionization of metastable 3P-state hydrogen atoms by electrons are calculated for various kinematic conditions in the asymmetric coplanar geometry. A multiple scattering theory is used in this study. The present results are compared with other existing related theoretical results for ionizations of hydrogen atoms from metastable 2S-state and 2P-state, showing a good qualitative agreement. There is no available theoretical study for ionization of metastable 3P-state hydrogen atoms by electrons. We are expecting that the present results provide a wide scope for further study of such ionization problems.
References
[1]
Trajmer, S. and Nickel, J.C. (1992) Cross-Section Measurements for Electron Impact on Excited Atomic Species. Advances In Atomic, Molecular, and Optical Physics, 30, 45. http://dx.doi.org/10.1016/S1049-250X(08)60173-1
[2]
Bethe, H. (1930) Zur Theorie des Durchgangs schneller Korpuskularstrahlen durch Materie, Annalen der Physik, 397, 325-400. http://dx.doi.org/10.1002/andp.19303970303
[3]
Ehrhardt, H., Jung, K., Knoth, G. and Schlemmer, P. (1986) Differential Cross Sections of Direct Single Electron Impact Ionization. Zeitschrift für Physik D Atoms, Molecules and Clusters, 1, 3. http://dx.doi.org/10.1007/BF01384654
[4]
Ehrhardt, H., Knoth, G., Schlemmer, P. and Jung, K. (1985) Absolute H(e, 2e)p Cross Section Measurements: Comparison with First and Second Order Theory. Physics Letters A, 110, 92-94. http://dx.doi.org/10.1016/0375-9601(85)90326-3
[5]
Ehrhardt, H., Schulz, M., Tekaat, T. and Willmann, K. (1969) Ionization of Helium: Angular Correlation of the Scattered and Ejected Electrons. Physical Review Letters, 22, 89. http://dx.doi.org/10.1103/PhysRevLett.22.89
[6]
Whelan, C.T. and Walters, H.R.J., Eds. (1997) Coincidence Studies of Electron and Photon Impact Ionization. Springer Publishing, 1-10.
[7]
Byron, W.F., Joachain, J.C. and Piraux, B. (1980) Triple Differential Cross Sections for the Ionisation of Atomic Hydrogen by Fast Electrons: A Second Born Treatment. Journal of Physics B: Atomic, Molecular and Optical Physic, 13, L673. http://dx.doi.org/10.1088/0022-3700/13/22/005
[8]
Byron, W.F., Joachain, J.C. and Piraux, B. (1986) Theory of Coplanar Asymmetric (e, 2e) Reactions in Helium. Journal of Physics B: Atomic, Molecular and Optical Physics, 19, 1201. http://dx.doi.org/10.1088/0022-3700/19/8/015
[9]
Das, J.N. (1990) Momentum-Space Analysis of Scattering States with Possible Application to Atomic Ionization. Physical Review A, 42, 1376. http://dx.doi.org/10.1103/PhysRevA.42.1376
[10]
Das, J.N. and Seal, S. (1993) Electron-Hydrogen-Atom Ionization Collisions at Intermediate (5I0-20I0) and High (≥20I0) Energies. Physical Review A, 47, 2978. http://dx.doi.org/10.1103/PhysRevA.47.2978
[11]
Das, J.N. and Dhar, S. (1999) Energy Spectrum of Ejected Electrons in Ionization of Hydrogen Atoms by Electrons. Pramana, 53, 869-875. http://dx.doi.org/10.1007/s12043-999-0121-9
[12]
Jones, S. and Madison, D.H. (2000) Ionization of Hydrogen Atoms by Fast Electrons. Physical Review A, 62, Article ID: 042701. http://dx.doi.org/10.1103/PhysRevA.62.042701
[13]
Jones, S. and Madison, D.H. (2002) Scaling Behavior of the Fully Differential Cross Section for Ionization of Hydrogen Atoms by the Impact of Fast Elementary Charged Particles. Physical Review A, 65, Article ID: 052727. http://dx.doi.org/10.1103/PhysRevA.65.052727
[14]
Vucic, S., Potvliege, R.M. and Joachain, C.J. (1987) Second Born Triple-Differential Cross Sections for the Coplanar Asymmetric Ionization of H(2S) by Fast Electrons. Physical Review A, 35, 1446. http://dx.doi.org/10.1103/PhysRevA.35.1446
[15]
Dal Cappello, C., Haddadou, A., Menas, F. and Roy, A.C. (2011) The Second Born Approximation for the Single and Double Ionization of Atoms by Electrons and Positrons. Journal of Physics B: Atomic, Molecular and Optical Physics, 44, Article ID: 015204. http://iopscience.iop.org/0953-4075/44/1/015204
[16]
Das, J.N. and Dhar, S. (1996) Symmetric Scattering in Electron and Positron Impact Ionization of Metastable 2S-State Hydrogen Atoms. Pramana, 47, 263-269. http://dx.doi.org/10.1007/BF02848527
[17]
Dhar, S. (1996) Electron Impact Ionisation of Metastable 2S-State Hydrogen Atoms. Australian Journal of Physics, 49, 937. http://dx.doi.org/10.1071/PH960937
[18]
Das, J.N. and Dhar, S. (1998) Energy Spectrum of Scattered Electrons in K-Shell Ionization of Medium to Heavy Atoms by Relativistic Electrons. Journal of Physics B: Atomic, Molecular and Optical Physics, 31, 2355-2358. http://dx.doi.org/10.1088/0953-4075/31/10/021
[19]
Qi, Y.Y., Ning, L.N., Wang, J.G. and Qu, Y.Z. (2013) Plasma Effect on Fast-Electron-Impact Ionization from 2p State of Hydrogen-Like Ions. Physics of Plasmas, 20, Article ID: 123301. http://dx.doi.org/10.1063/1.4833616
[20]
Dhar, S. and Nahar, N. (2015) Electron Impact Ionization of Metastable 2P-State Hydrogen Atoms in the Coplanar Geometry. Results in Physics, 5, 3-8. http://dx.doi.org/10.1016/j.rinp.2014.11.001
[21]
Dhar, S. and Nahar, N. (2014) Ionization of Metastable 2P-State Hydrogen Atoms by Electron Impact for Coplanar Asymmetric Geometry. Open Journal of Microphysics, 4, 46-53. http://dx.doi.org/10.4236/ojm.2014.44007
[22]
Dörr, M., et al. (2008) Higher-Order Contributions Observed in Three-Dimensional (e, 2e) Cross-Section Measurements at 1-keV Impact Energy. Physical Review A, 77, Article ID: 032717. http://dx.doi.org/10.1103/PhysRevA.77.032717
[23]
Ren, X., Dorn, A. and Ullrich, J. (2008) Coulomb Four-Body Problem: Electron-Impact Double Ionization of Helium in the Threshold Regime. Physical Review Letters, 101, Article ID: 093201. http://dx.doi.org/10.1103/PhysRevLett.101.093201
[24]
Dürr, M., Najjari, B., Schulz, M., Voitkiv, A.B. and Ullrich, J. (2007) Analysis of Experimental Data for Ion-Impact Single Ionization of Helium with Monte Carlo Event Generators Based on Quantum Theory. Physical Review A, 75, Article ID: 062708. http://dx.doi.org/10.1103/PhysRevA.75.062708
[25]
Brauner, M. and Briggs, J.S. (1986) Ionisation to the Projectile Continuum by Positron and Electron Collisions with Neutral Atoms. Journal of Physics B: Atomic, Molecular and Optical Physics, 19, L325-L330. http://dx.doi.org/10.1088/0022-3700/19/9/006
[26]
Brauner, M., Briggs, J.S. and Klar, H. (1989) Triply-Differential Cross Sections for Ionisation of Hydrogen Atoms by Electrons and Positrons. Journal of Physics B: Atomic, Molecular and Optical Physics, 22, 2265-2287. http://dx.doi.org/10.1088/0953-4075/22/14/010
[27]
Brauner, M., Briggs, J.S. and Klar, H. (1991) Structures in Differential Cross Sections for Positron Impact Ionization of Hydrogen. Journal of Physics B: Atomic, Molecular and Optical Physics, 24, 2227-2236. http://dx.doi.org/10.1088/0953-4075/24/8/030
[28]
Köver, A. and Laricchia, G. (1998) Triply Differential Study of Positron Impact Ionization of H2. Physical Review Letters, 80, 5309-5312. http://dx.doi.org/10.1103/PhysRevLett.80.5309
[29]
Berakder, J. and Klar, H. (1993) Structures in Triply and Doubly Differential Ionization Cross Sections of Atomic Hydrogen. Journal of Physics B: Atomic, Molecular and Optical Physics, 26, 3891-3913. http://dx.doi.org/10.1088/0953-4075/26/21/023
[30]
Ghosh Deb, S., Roy, S. and Sinha, C. (2009) Multiphoton (e, 2e) Process of Hydrogen Atom in Strong Laser Field. The European Physical Journal D, 55, 591-600. http://dx.doi.org/10.1140/epjd/e2009-00254-x
[31]
Lewis, R.R. (1956) Potential Scattering of High-Energy Electrons in Second Born Approximation. Physical Review, 102, 537-543. http://dx.doi.org/10.1103/PhysRev.102.537
