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Absolute cross section for electron-impact ionization ofHe(1s2sS3)

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Génévriez, Matthieu [UCL] Jureta, Jozo [UCL] Defrance, Pierre [UCL] Urbain, Xavier [UCL]

We present an experimental determination of the electron-impact ionization cross section of the 1s2s 3S state of helium, for which there is a serious long-lasting discrepancy between theory and experiment. A technique for the production of a fast, intense beam of helium in the 1s2s 3S state only has been developed for this purpose,based on photodetachment of the He− anion. The cross section is measured using the animated crossed beam technique. The present results are much lower than the experimental data of Dixon et al. [J. Phys. B 9, 2617 (1976)] and are in excellent agreement with the calculation of Fursa and Bray [J. Phys. B 36, 1663 (2003)].

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2017
Language Anglais
Journal information "Physical Review A" - Vol. 96, no.1, p. 010701-1 - 010701-4 (2017)
Peer reviewed yes
issn 2469-9926
e-issn 2469-9934
Publication status Publié
Affiliation UCL - SST/IMCN/NAPS - Nanoscopic Physics
Links
  1. Dixon A J, Harrison M F A, Smith A C H, A measurement of the electron impact ionization cross section of helium atoms in metastable states, 10.1088/0022-3700/9/15/013
  2. Colgan J., Pindzola M. S., Time-dependent close-coupling studies of the electron-impact ionization of excited-state helium, 10.1103/physreva.66.062707
  3. Fursa D V, Bray I, Electron-impact ionization of the helium metastable 2 3S state, 10.1088/0953-4075/36/8/317
  4. Ralchenko Yu., Janev R.K., Kato T., Fursa D.V., Bray I., de Heer F.J., Electron-impact excitation and ionization cross sections for ground state and excited helium atoms, 10.1016/j.adt.2007.11.003
  5. Bartschat Klaus, Convergent R-matrix with pseudostates calculations for electron-impact ionization of the n   2 states in helium, 10.1088/0953-4075/35/23/104
  6. Baldwin Kenneth, Metastable helium: Atom optics with nano-grenades, 10.1080/00107510412331332798
  7. Ali M. Asgar, Stone P.M., Electron impact ionization of metastable rare gases: He, Ne and Ar, 10.1016/j.ijms.2007.10.006
  8. Fursa Dmitry V, Bray Igor, Convergent close-coupling calculations of electron - helium scattering, 10.1088/0953-4075/30/4/003
  9. Bray I, Fursa D V, Kheifets A S, Stelbovics A T, Electrons and photons colliding with atoms: development and application of the convergent close-coupling method, 10.1088/0953-4075/35/15/201
  10. Hodgman S. S., Dall R. G., Byron L. J., Baldwin K. G. H., Buckman S. J., Truscott A. G., Metastable Helium: A New Determination of the Longest Atomic Excited-State Lifetime, 10.1103/physrevlett.103.053002
  11. McDonald D C, Cordey J G, Righi E, Ryter F, Saibene G, Sartori R, Alper B, Becoulet M, Brzozowski J, Coffey I, Baar M de, Vries P de, Erents K, Fundamenski W, Giroud C, Jenkins I, Loarte A, Lomas P J, Maddison G P, Mailloux J, Murari A, Ongena J, Rapp J, Pitts R A, Stamp M, Strachan J, Suttrop W, Contributors JET EFDA, ELMy H-modes in JET helium-4 plasmas, 10.1088/0741-3335/46/3/007
  12. Summers H. P., von Hellermann M., Breger P., Frieling J., Horton L. D., Konig R., Mandl W., Morsi H., Wolf R., de Heer F. J., Hoekstra R., Fritsch W., Atomic processes relevant to neutral beam based tokamak diagnostics, 10.1063/1.42476
  13. Schmitz O, Beigman I L, Vainshtein L A, Schweer B, Kantor M, Pospieszczyk A, Xu Y, Krychowiak M, Lehnen M, Samm U, Unterberg B, , Status of electron temperature and density measurement with beam emission spectroscopy on thermal helium at TEXTOR, 10.1088/0741-3335/50/11/115004
  14. Goto M, Collisional-radiative model for neutral helium in plasma revisited, 10.1016/s0022-4073(02)00060-2
  15. Falcinelli Stefano, Pirani Fernando, Vecchiocattivi Franco, The Possible Role of Penning Ionization Processes in Planetary Atmospheres, 10.3390/atmos6030299
  16. Niemi K, Waskoenig J, Sadeghi N, Gans T, O'Connell D, The role of helium metastable states in radio-frequency driven helium–oxygen atmospheric pressure plasma jets: measurement and numerical simulation, 10.1088/0963-0252/20/5/055005
  17. Stoffels E, Kieft I E, Sladek R E J, Bedem L J M van den, Laan E P van der, Steinbuch M, Plasma needle forin vivomedical treatment: recent developments and perspectives, 10.1088/0963-0252/15/4/s03
  18. Fridman Gregory, Peddinghaus Marie, Balasubramanian Manjula, Ayan Halim, Fridman Alexander, Gutsol Alexander, Brooks Ari, Blood Coagulation and Living Tissue Sterilization by Floating-Electrode Dielectric Barrier Discharge in Air, 10.1007/s11090-006-9024-4
  19. Nowak S., Pfau T., Mlynek J., Nanolithography with metastabile helium, 10.1007/bf01095274
  20. Petra S.J.H., Feenstra L., Hogervorst W., Vassen W., Nanolithography with metastable helium atoms in a high-power standing-wave light field, 10.1007/s00340-003-1371-8
  21. Morgner H., The Characterization of Liquid and Solid Surfaces with Metastable Helium Atoms, Advances In Atomic, Molecular, and Optical Physics (2000) ISBN:9780120038428 p.387-488, 10.1016/s1049-250x(08)60191-3
  22. Pratt A., Kurahashi M., Sun X., Gilks D., Yamauchi Y., Direct observation of a positive spin polarization at the (111) surface of magnetite, 10.1103/physrevb.85.180409
  23. Robert A., Sirjean O., Browaeys A., Poupard J., Nowak S., Boiron D., Westbrook C. I., Aspect A., A Bose-Einstein Condensate of Metastable Atoms, 10.1126/science.1060622
  24. Lawall J., Bardou F., Saubamea B., Shimizu K., Leduc M., Aspect A., Cohen-Tannoudji C., Two-Dimensional Subrecoil Laser Cooling, 10.1103/physrevlett.73.1915
  25. Koolen A. E. A., Jansen G. T., Domen K. F. E. M., Beijerinck H. C. W., van Leeuwen K. A. H., Large-angle adjustable coherent atomic beam splitter by Bragg scattering, 10.1103/physreva.65.041601
  26. Defrance P, Brouillard F, Claeys W, Wassenhove G Van, Crossed beam measurement of absolute cross sections: an alternative method and its application to the electron impact ionisation of He+, 10.1088/0022-3700/14/1/012
  27. Lecointre J, Belic D S, Cherkani-Hassani H, Jureta J J, Defrance P, A crossed-beam experiment for electron impact ionization and dissociation of molecular ions: its application to CO+, 10.1088/0953-4075/39/16/011
  28. T. J. Gay, Atomic, Molecular, and Optical Physics: Atoms and Molecules (1996)
  29. Halfmann T, Koensgen J, Bergmann K, A source for a high-intensity pulsed beam of metastable helium atoms, 10.1088/0957-0233/11/10/312
  30. Reynaud C., Pommier J., Tuan Vu Ngoc, Barat M., Composition of He Metastable Beams Formed by Charge Exchange inHe+-Alkali-Metal Collisions at Medium Energy, 10.1103/physrevlett.43.579
  31. Neynaber R. H., Magnuson G. D., Composition of partially metastable rare gas beams, 10.1063/1.433075
  32. Sidis V., Kubach C., Pommier J., Systematic theoretical investigation of charge exchange inHe+-alkali-atom collisions, 10.1103/physreva.23.119
  33. Hecht T., Winter H., McCullough R. W., New method to analyze fast metastable atomic beams, 10.1063/1.1148181
  34. Dinklage A, Lokajczyk T, Kunze H J, Measurement of the population in a beam by means of laser-induced fluorescence, 10.1088/0953-4075/29/9/012
  35. Xi Jinhua, Froese Fischer Charlotte, Cross section and angular distribution for the photodetachment ofHe−(1s2s2p4Po) below the He(n=4) threshold, 10.1103/physreva.53.3169
  36. Reinhed P., Orbán A., Werner J., Rosén S., Thomas R. D., Kashperka I., Johansson H. A. B., Misra D., Brännholm L., Björkhage M., Cederquist H., Schmidt H. T., Precision Lifetime Measurements ofHe−in a Cryogenic Electrostatic Ion-Beam Trap, 10.1103/physrevlett.103.213002
  37. Brouillard F, Defrance P, Animated Crossed Beams for the Measurement of Electron Impact Ionisation, 10.1088/0031-8949/1983/t3/015
  38. Naji A, Olamba K, Chenu J P, Szücs S, Chibisov M, Brouillard F, Associative ionization in collisions of with and, 10.1088/0953-4075/31/13/014
  39. Long Daniel R., Geballe Ronald, Electron-Impact Ionization ofHe(2sS3), 10.1103/physreva.1.260
  40. Ton-That D, Flannery M R, Manson S T, Cross sections for excitation and ionization in e-He(21,3S) collisions, 10.1088/0022-3700/10/4/016
  41. Beigman I.L., Vainshtein L.A., Brix M., Pospieszczyk A., Bray I., Fursa D.V., Ralchenko Yu.V., EXCITATION AND IONIZATION CROSS SECTIONS FOR HE I FROM NORMALIZED BORN AND K-MATRIX CALCULATIONS: ΔS = 0 TRANSITIONS FROM n = 2, 3 EXCITED STATES, 10.1006/adnd.1999.0826
  42. Briggs John S., Kim Yong-Ki, Total Cross Sections for Inelastic Scattering of Charged Particles by Atoms and Molecules. VI. Metastable Helium, 10.1103/physreva.3.1342
  43. Deutsch H, Becker K, Matt S, Märk T D, Calculated cross sections for the electron-impact ionization of metastable atoms, 10.1088/0953-4075/32/17/309
  44. Taylor I R, Kingston A E, Bell K L, Electron ionisation of 23S helium, 10.1088/0022-3700/12/18/024
  45. Fursa Dmitry V., Bray Igor, Calculation of electron-helium scattering, 10.1103/physreva.52.1279
Bibliographic reference Génévriez, Matthieu ; Jureta, Jozo ; Defrance, Pierre ; Urbain, Xavier. Absolute cross section for electron-impact ionization ofHe(1s2sS3). In: Physical Review A, Vol. 96, no.1, p. 010701-1 - 010701-4 (2017)
Permanent URL http://hdl.handle.net/2078.1/186927