Photoionization of He - a Field Theoretic Approach

• Authors: S. Bhattacharyya , S. Mitra
• Languages of publication: EN

Abstracts

EN

The present paper deals with the field theoretic study of single ionization cross-sectionsσ_{ph} and σ_C of helium due to photoelectric effect and the Compton scattering, respectively, by photons of energy lying between 0-12 keV. In this energy range,σ_{ph} gradually decreases with energy whileσ_C gradually increases. There is a crossover point around 6.5 keV where σ_{ph}=σ_C=10^{-24} cm^2. Near about this crossover point σ_{ph} andσ_C curves are like mirror images. The ratio σ_C/σ_{ph} lies between 0.3 to 1.5 in the energy range under consideration. The present results are compared with existing theoretical results.

Keywords

EN

32.80.Cy; 32.80.Fb

Discipline

• 32.80.Fb: Photoionization of atoms and ions(for fluorescence yield, see 32.50.+d)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2001
• Volume: 100
• Issue: 4
• Pages: 505-516

Dates

published

2001-10

received

2001-03-05

(unknown)

2001-07-10

Contributors

author

S. Bhattacharyya

• Gokhale Memorial Girls' College, Calcutta, India

author

S. Mitra

• Gokhale Memorial Girls' College, Calcutta, India

References

• 1. D.V. Morgan, R.J. Barlett, Phys. Rev. A, 59, 4075, 1999
• 2. K. Hino, P.M. Bergstrom, J.H. Macek, Phys. Rev. Lett., 72, 1620, 1994
• 3. K. Hino, T. Ishihara, F. Shimizu, N. Toshima, J.H. McGuire, Phys. Rev. A, 48, 1271, 1993
• 4. L.R. Andersson, J. Burgdorfer, Phys. Rev. Lett., 71, 50, 1993
• 5. S. Bhattacharyya, S. Mitra, Phys. Rev. A, 60, 2269, 1999
• 6. S. Bhattacharyya, S. Mitra, Phys. Rev. A, 62, 032709(1-7), 2000
• 7. S. Bhattacharyya, K. Pathak, Indian J. Phys. B, 74, 1, 2000
• 8. S. Bhattacharyya, K. Pathak, Acta Phys. Pol. A, 98, 335, 2000
• 9. S. Jetzke, F.H.M. Faisal, R. Hippler, H.O. Lutz, Z. Phys. A, 315, 271, 1984
• 10. W. Greiner, J. Reinhardt, Quantum Electrodynamics, 2nd ed., Springer-Verlag, New York 1994
• 11. C. Itzykson, J. Zuber, Quantum Field Theory, McGraw-Hill Book Co., New York 1980
• 12. J.J. Sakurai, Advanced Quantum Mechanics, Addison Wesley, London 1967
• 13. W.T. Viegele, At. Data, 5, 51, 1973

Identifiers

DOI

10.12693/APhysPolA.100.505