Interpretation of the Anomalous NaI Events

  • G. Chardin
  • A. Benoit
  • L. Bergé
  • A. Broniatowski
  • M. Caussignac
  • B. Chambon
  • M. Chapellier
  • P. Charvin
  • M. De Jésus
  • D. Drain
  • L. Dumoulin
  • P. Garoche
  • J. Gascon
  • C. Goldbach
  • M. Goyot
  • M. Gros
  • A. Juillard
  • A. de Lesquen
  • M. Loidl
  • J. Mallet
  • J. Mangin
  • S. Marnieros
  • M. Martin
  • O. Martineau
  • N. Mirabolfathi
  • L. Miramonti
  • L. Mosca
  • X-F. Navick
  • G. Nollez
  • P. Pari
  • E. Simon
  • M. Stern
  • J-P. Torre
  • L. Vagneron
Conference paper

Abstract

Anomalous events, with scintillation decay times shorter than nuclear recoils, have been observed by the UKDMC and Saclay NaI experiments. By using the event categories observed in the EDELWEISS experiment, we propose to interpret the anomalous NaI events as surface nuclear recoils accompanied with a small energy loss of an escaping alpha particle. The discrimination performances of the NaI experiments which have not taken into account these events in their analysis, notably for axial WIMP interactions, must then be reevaluated.

Keywords

Dust Iodine Iodide Half Life Paraffin 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • G. Chardin
    • 1
  • A. Benoit
    • 2
  • L. Bergé
    • 3
  • A. Broniatowski
    • 3
  • M. Caussignac
    • 2
  • B. Chambon
    • 4
  • M. Chapellier
    • 5
  • P. Charvin
    • 1
    • 6
  • M. De Jésus
    • 4
  • D. Drain
    • 4
  • L. Dumoulin
    • 3
  • P. Garoche
    • 7
  • J. Gascon
    • 4
  • C. Goldbach
    • 8
  • M. Goyot
    • 4
  • M. Gros
    • 1
  • A. Juillard
    • 1
  • A. de Lesquen
    • 1
  • M. Loidl
    • 1
  • J. Mallet
    • 1
  • J. Mangin
    • 9
  • S. Marnieros
    • 3
  • M. Martin
    • 8
  • O. Martineau
    • 4
  • N. Mirabolfathi
    • 3
  • L. Miramonti
    • 1
  • L. Mosca
    • 1
  • X-F. Navick
    • 1
  • G. Nollez
    • 8
  • P. Pari
    • 5
  • E. Simon
    • 4
  • M. Stern
    • 4
  • J-P. Torre
    • 10
  • L. Vagneron
    • 4
  1. 1.DSM/DAPNIACEA, CEN de SaclayGif-sur-YvetteFrance
  2. 2.Centre de Recherche sur les Très Basses TempératuresGrenobleFrance
  3. 3.CSNSM, IN2P3-CNRSUniv. Paris XI, bat 108Orsay CedexFrance
  4. 4.IPN Lyon and UCBLIN2P3-CNRSVilleurbanne CedexFrance
  5. 5.DSM/DRECAMCEA, CEN de SaclayGif-sur-Yvette CedexFrance
  6. 6.Laboratoire Souterrain de ModaneCEA-CNRSModaneFrance
  7. 7.Laboratoire de Physique des SolidesUniversité Paris-Sud OrsayOrsayFrance
  8. 8.Institut d’Astrophysique de ParisINSU-CNRSParisFrance
  9. 9.LPUBUniversité de BourgogneDijonFrance
  10. 10.Service d’AéronomieVerrières le Buisson CedexFrance

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