Publications in Atomic Physics

Group D1: Physics of Atoms and Particles

52) SPIN-POLARIZATION STUDY OF CO MOLECULES ADSORBED ON Fe(110) USING METASTABLE-ATOM DEEXCITATION SPECTROSCOPY AND FIRST-PRINCIPLE CALCULATIONS.
By X. Sun, S. Förster, Q.X. Li, M. Kurahashi, T. Suzuki, J.W. Zhang, Y. Yamauchi, G. Baum, and H. Steidl (Nat.Inst.Mat.Sciences,Sengen,Tsukuba; Univ.Science Technology,Hefei, Anhui; Bielefeld U.; Jap.Science amd Technology Agency,Honcho,Kawaguchi). 2007.
Published in Phys.Rev.B75:035419,1-9,2007

51) ANGLE-DIFFERENTIAL CROSS SECTIONS AND SPIN-ASYMMETRY PARAMETERS FOR SPIN-POLARIZED ELECTRON-IMPACT EXCITATION OF SPIN-POLARIZED CESIUM ATOM.
By G. Baum, S. Förster, N. Pavlovic, B. Roth, K. Bartschat, and I. Bray (Bielefeld U. & Drake U., Des Moines & Murdoch U., Perth). 2004.
Published in Phys.Rev.A70:012707,1-13,2004

50) SPIN ASYMMETRY MEASUREMENTS IN INELASTIC e-Cs COLLISIONS.
By N. Pavlovic, G. Baum, I. Ernsting, S. Förster, and B. Roth (Bielefeld U.). 2003.
Published in AIP Conf.Proceed. 697 (eds. G. Friedrich Hanne, Laurence Malegat, Horst Schmidt-Böcking), pp. 199-204.

49) OXYGEN ADSORPTION ON Fe/W(110) AND Co/W(110) THIN FILMS: SURFACE MAGNETIC PROPERTIES.
By S. Förster, G. Baum, M. Müller, and H. Steidl (Bielefeld U.). 2002.
Published in Phys.Rev.B66:134427,1-8,2002

48) DETAILED EXPERIMENTAL AND THEORETICAL STUDY OF ELASTIC SCATTERING AT INTERMEDIATE ENERGIES IN THE ELECTRON-CESIUM SYSTEM.
By G. Baum, N. Pavlovic, B. Roth, K. Bartschat, Y. Fang, and I. Bray (Bielefeld U. & Drake U., Des Moines & Murdoch U., Perth). 2002.
Published in Phys.Rev.A66:022705,1-9,2002

47) SPIN ASYMMETRIES IN ELASTIC AND INELASTIC SCATTERING OF SPIN-POLARIZED ELECTRONS FROM SPIN-POLARIZED CESIUM ATOMS.
By G. Baum, N. Pavlovic, and B. Roth (Bielefeld U.). 2001.
Published in *Princeton 2002: Photonic, Electronic & Atomic Collisions*, Rinton Press (eds. J. Burgdörfer, J.S. Cohen, S. Datz, and C.R. Vance), 460-470.

46) ROLE OF EXCHANGE AND KINEMATIC IN THE GENERATION OF LOW-ENERGY POLARIZED ELECTRON PAIRS.
By M. Streun, G. Baum, W. Blask, and J. Berakdar (Bielefeld U. & CERN). 1999.
Published in Phys.Rev.A59:R4109-4112,1999

45) SPIN ASYMMETRIES IN LOW-ENERGY ELECTRON SCATTERING FROM CESIUM ATOMS.
By G. Baum, W. Raith, M. Tondera, K. Bartschat, I. Bray, S. Ait-Tahar, I. Grant, and P. Norrington (Bielefeld U. & Drake U., Des Moines & Flinders U., Adelaide & Oxford U. & Queens U., Belfast). 1999.
Published in Phys.Rev.Lett.82:1128-1131,1999

44) MEASUREMENT OF EXCHANGE EFFECTS IN (e,2e) COLLISIONS ON LITHIUM.
By G. Baum, W. Blask, and M. Streun. 1999.
Published in J.Phys.IV France 9:219-223,1999

43) (e,2e) MEASUREMENTS ON LITHIUM WITH SPIN-POLARIZED BEAMS OF ELECTRONS AND ATOMS.
By M. Streun and G. Baum (Bielefeld U.). 1998.
In *Cambridge 1998: New Directions in Atomic Physics* , eds. C.T. Whelan et al., London Kluwer Academic 1999, pp. 263-268.

42) SPIN DEPENDENCE OF (e,2e) COLLISIONS ON LITHIUM AT 54.4 eV.
By M. Streun, G. Baum, W. Blask, J. Rasch, I. Bray, D. Fursa, S. Jones, D. Madison, H. Walters, and C. Whelan (Bielefeld U. & Flinders U., Adelaide). 1998.
Published in J.Phys.B31:4401-4411,1998

41) MEASUREMENT OF SPIN POLARIZED (e,2e) PROCESSES AT 54.4 eV.
By M. Streun, G. Baum, W. Blask, S. Foerster, W. Raith and I. Schmaehl (Bielefeld U.). 1997.
In *New York 1997, Coincidence Studies of Electron and Photon Impact Ionization* 231-237.

40) INTERACTION OF SPIN-POLARIZED HELIUM (2^3S)-ATOMS WITH FERROMAGNETIC SURFACES.
By H. Steidl and G. Baum (Bielefeld U.). 1996.
In *New York and London 1996, Selected Topics on Electron Physics* 233-241.

39) INTERFERENCE EFFECTS BETWEEN ELECTRON EXCHANGE AND THE SPIN-ORBIT INTERACTION.
By W. Raith, G. Baum, and M. Tondera (Bielefeld U.). 1996.
In *Can. J. Phys.74* 883-888.

38) MEASUREMENT OF SPIN OBSERVABLES IN ELECTRON SCATTERING FROM ATOMS AND NUCLEONS.
By G. Baum and W. Raith (Bielefeld U.). 1996.
In *New York and London 1996, Selected Topics on Electron Physics* 15-30.

37) MEASUREMENT OF EXCHANGE AND SPIN-ORBIT EFFECTS AND THEIR INTERFERENCE IN ELASTIC e-Cs-SCATTERING.
By M. Tondera et al. (Bielefeld U.). 1995.
In *The Physics of Electronic and Atomic Collisions, Conf. Proc. 360, 1995* 805-813.

36) MEASUREMENT OF EXCHANGE AND SPIN-ORBIT INTERACTION EFFECTS IN ELASTIC ELECTRON-CESIUM SCATTERING.
By W. Raith et al. (Bielefeld U.). 1995.
In *New York 1995, Polarized Electron / Polarized Photon Physics* 23-35.

35) MEASUREMENT OF EXCHANGE AND SPIN-ORBIT INTERACTION EFFECTS AND THEIR INTERFERENCE IN ELASTIC e-Cs SCATTERING at 7 eV.
By B. Leuer, G. Baum, L. Grau, R. Niemeyer, W. Raith, and M. Tondera (Bielefeld U.). 1995.
Published in Z.Phys. D33, 39-42, 1995.

34) SURFACE MAGNETIC PROPERTIES OF OXYGEN ON FERROMAGNETIC FILMS: A SPIN RESOLVED MDS STUDY.
By M. Getzlaff et al. (Bielefeld U.). 1995.
Published in Surf.Sci. 31-333, 1404-1407. 1995.

33) SURFACE MAGNETIC PROPERTIES OF OXYGEN ON Fe (110).
By M. Getzlaff et al. (Bielefeld U.). 1995.
Published in J.Magn.Magn.Mater. 140-144, 727-728. 1995.

32) SURFACE MAGNETIC PROPERTIES OF Fe (110) AND Co(0001) FILMS.
By G. Baum et al. (Bielefeld U.). 1995.
Published in J.Magn.Magn.Mater. 148, 179-180, 1995.

31) POLARIZATION AND CORRELATION IN ELECTRONIC AND ATOMIC COLLISIONS.
By R. Hippler and G. Baum (Bielefeld U.). 1994.
Published in Comments At. Mol. Phys. 30, 307-313, 1994.

30) INVESTIGATION OF FERROMAGNETIC SURFACES WITH SPIN POLARIZED METASTABLE HE(2^3S) ATOMS.
By M. Getzlaff, D. Egert, H. Steidl, G. Baum, and W. Raith (Bielefeld U.). 1994.
Published in Z. Phys. D30, 245-249, 1994.

29) SPIN ASYMMETRY IN ELECTRON IMPACT IONIZATION OF CAESIUM.
By G. Baum, B. Granitza, L. Grau, B. Leuer, W. Raith, K. Rott, M. Tondera, and B. Witthuhn (Bielefeld U.). 1993.
Published in J.Phys. B26, 331-336, 1993.

28) SPIN ASYMMETRIES FOR TRIPLE-DIFFERENTIAL ELECTRON-IMPACT IONIZATION OF LITHIUM AT 54.4 eV.
By G. Baum, W. Blask, P. Freienstein, L. Frost, S. Hesse, W. Raith, P. Rappolt, and M. Streun (Bielefeld U.). 1992.
Published in Phys.Rev.Lett. 69, 3037-40, 1992.

27) IMPACT IONIZATION OF POLARIZED ATOMS BY POLARIZED ELECTRONS: MEASUREMENT OF THE INTEGRAL POLARIZATION ASYMMETRY.
By W. Raith, G. Baum, B. Granitza, B. Leuer, and H. Steidl (Bielefeld U.). 1991.
In *Correlations and Polarization in Electronic and Atomic Collisions and (e,2e) Reactions* IOP Conf.Series 122, 247-254, 1991.

26) EXCHANGE IN ELECTRON IMPACT IONIZATION: TRIPLE DIFFERENTIAL MEASUREMENTS WITH POLARIZED BEAMS.
By L. Frost, G. Baum, W. Blask, P. Freienstein, S. Hesse, and W. Raith (Bielefeld U.). 1991.
In *Brisbane 1991, Proc. XVII ICPEAC Brisbane*, 655-664, 1991.

25) AN OPTICALLY PUMPED, HIGHLY POLARIZED CESIUM BEAM FOR THE STUDY OF SPIN-DEPENDENT ELECTRON SCATTERING.
By G. Baum, B. Granitza, S. Hesse, B. Leuer, W. Raith, K. Rott, M. Tondera, and B. Witthuhn (Bielefeld U.). 1991.
Published in Z.Phys. D22, 431-436, 1991.

24) LOW-ENERGY CATHODOLUMINESCENCE EXPERIMENT WITH POLARIZED ELECTRONS AND A NEGATIVE-ELECTRON AFFINITY GaAs TARGET.
By D. Goeckel, G. Baum, B. Fromme, V. Lehmann, B. Lohmann, and W. Raith (Bielefeld U.). 1990.
Published in Phys.Rev. B42, 7242-44, 1990.

23) SPIN POLARIZED ELECTRON IMPACT IONIZATION OF ATOMS.
By G. Baum, P. Freienstein, L. Frost, B. Granitza, W. Raith, and H. Steidl (Bielefeld U.). 1990.
In *Hoboken 1989, Proceed. Int. Symp. on Correlation and Polarization in Electronic and Atomic Collisions*, NIST Special Publication 789, eds. P.A. Neill et al., Washington 20402, 1990, pp. 121-127.

22) EMISSION OF CURCULARLY POLARIZED RECOMBINATION RADIATION FROM p-DOPED GaAs and GaAsP UNDER THE IMPACT OF POLARIZED ELECTRONS.
By B. Fromme, G. Baum, D. Goeckel, and W. Raith (Bielefeld U.). 1989.
Published in Phys.Rev. B40, 12312-318, 1989.

21) POLARIZED ELECTRON-IMPACT IONIZATION OF METASTABLE HELIUM.
By G. Baum, M. Fink, W. Raith, H. Steidl, and J. Taborski (Bielefeld U.). 1989.
Published in Phys.Rev. A40, 6743-36, 1989.

20) SPIN ASYMMETRIES IN THE LOW-ENERGY ELECTRON IMPACT EXCITATION OF 2s-2p TRANSITIONS
IN LITHIUM ATOMS.
By G. Baum, L. Frost, W. Raith, and U. Sillmen (Bielefeld U.). 1989.
Published in J.Phys. B22, 1667-77, 1989.

19) THE SPIN DEPENDENCE OF THE EXCITATION OF METASTABLE AUTOIONISING LITHIUM ^4P STATES BY ELECTRON IMPACT.
By G. Baum, W. Raith, and W. Schroeder (Bielefeld U.). 1988.
Published in J.Phys. B21, L501-07, 1988.

18) PRODUCTION OF A SPIN-POLARIZED METASTABLE He(2^3S)-BEAM FOR STUDIES IN ATOMIC AND SURFACE PHYSICS.
By G. Baum, W. Raith, and H. Steidl (Bielefeld U.). 1988.
Published in Z.Phys. D10, 171-78, 1988.

17) MEASUREMENT OF SPIN DEPENDENCE IN LOW-ENERGY ELASTIC SCATTERING OF ELECTRONS FROM LITHIUM ATOMS.
By G. Baum, M. Moede, W. Raith, and U. Sillmen (Bielefeld U.). 1986.
Published in Phys.Rev.Lett. 57, 1855-58, 1986.

16) MEASUREMENT OF SPIN ASYMMETRIES IN THE ELECTRON IMPACT IONISATION OF ALKALI ATOMS.
By G. Baum, M. Moede, W. Raith, and W. Schroeder (Bielefeld U.). 1985.
Published in J.Phys. B18, 531-538, 1985.

15) A SPIN FLIPPER FOR REVERSAL OF POLARISATION IN A THERMAN ATOMIC BEAM.
By W. Schroeder and G. Baum (Bielefeld U.). 1983.
Published in J.Phys. E16, 52-56, 1983.

14) SPIN INTERACTION IN ELECTRON-ATOM COLLISIONS.
By G. Baum (Bielefeld U.). 1982.
In *Trends in Physics, Proceedings of the 5th EPS General Conference, Istanbul*, 460-469, Central Institute of Physics, Bucharest, 1982.

13) SPIN DEPENDENT ELECTRON IMPACT IONISATION OF LITHIUM FROM THRESHOLD TO 80 eV.
By G. Baum, E. Kisker, W. Raith, W. Schroeder, U. Sillmen, and D. Zenses (Bielefeld U.). 1981.
Published in J.Phys. B14, 4377-88, 1981.

12) POLARIZED ELECTRON-LITHIUM SCATTERING.
By W. Raith, G. Baum, D. Caldwell, and E. Kisker (Bielefeld U.). 1980.
In *Coherence and Correlation in Atomic Collisions*, Plenum Press, 567-75, 1980.

11) DUAL-FREQUENCY OPTICAL PUMPING FOR SPIN-POLARIZING AT LITHIUM ATOMIC BEAM.
By G. Baum, D. Caldwell, and W. Schroeder (Bielefeld U.). 1980.
Published in Appl.Phys. 21, 121-26, 1980.

10) APPLICATION OF A DE FANO EFFECT POLARIZED ELECTRON SOURCE TO LOW-ENERGY ELECTRON-ATOM SCATTERING.
By P. Wainwright, M. Alguard, G. Baum, and M. Lubell (Bielefeld U.). 1978.
Published in Rev.Sci.Instr. 49, 571-85, 1978.

9) ELECTRON FIELD EMISSION FROM FERROMAGNETIC EUROPIUM SULFIDE ON TUNGSTEN.
By E. Kisker, G. Baum,, A. Mahan, W. Raith, and B. Reihl (Bielefeld U.). 1978.
Published in Phys.Rev. B18, 2256-75, 1978.

8) FIELD EMISSION OF MONOENERGETIC SPIN-POLARIZED ELECTRONS.
By G. Baum, E. Kisker, A. Mahan, W. Raith, and B. Reihl (Bielefeld U.). 1977.
Published in Appl.Phys. 14, 149-53, 1977.

7) DEPOLARIZATION EFFECTS IN PULSED PHOTIONIZATION OF STATE-SELECTED LITHIUM.
By M. Alguard, J. Clendenin, P. Cooper, R. Ehrlich, V. Hughes, M. Lubell, G. Baum, and K. Schueler (Bielefeld U.). 1977.
Published in Phys.Rev. 16, 209-12, 1977.

6) MEASUREMENT OF THE SCALAR POLARIZABILITY OF VERY HIGHLY EXCITED STATES OF CAESIUM.
By A. van Raan, G. Baum, and W. Raith (Bielefeld U.). 1976.
Published in J.Phys. B9, L349-52, 1976.

5) ONE- AND TWO-PHOTON PRODUCTION OF VERY HIGHLY EXCITED STATES OF CAESIUM.
By A. van Raan, G. Baum, and W. Raith (Bielefeld U.). 1976.
Published in J.Phys. B9, L173-76, 1976.

4) CONDUCTION-BAND TUNNELING AND ELECTRON-SPIN POLARIZATION IN FIEDL EMISSION FROM MAGNETICALLY ORDERED EUROPIUM SULFID ON TUNGSTEN.
By E. Kisker, G. Baum, A. Mahan, W. Raith, and K. Schroeder (Bielefeld U.). 1976.
Published in Phys.Rev.Lett. 36, 982-85, 1976.

3) THE TEMPERATURE DEPENDENCE OF THE SPIN POLARIZATION OF FIELD EMITTED ELECTRONS FROM A W-EWuS-VACUUM JUNCTION.
By G. Baum, E. Kisker, A. Mahan, and K. Schroeder (Bielefeld U.). 1976.
Published in J.Magn.Magn.Mater. 3, 4-6, 1976.

2) MEASUREMENT OF THE SPIN-ORBIT PERTURBATION IN THE P-STATE CONTINUUM OF HEAVY ALKALI-METAL ATOMS: K, Rb, and Cs.
By G. Baum, M. Lubell, and W. Raith (Bielefeld U.). 1972.
Published in Phys.Rev. A5, 1073-97, 1972.

1) SPIN-ORBIT PERTURBATION IN HEAVY ALKALI ATOMS.
By G. Baum, M. Lubell, and W. Raith (Bielefeld U.). 1970.
Published in Phys.Rev.Lett. 25, 267-70, 1970.