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Thermal and chemical equilibrium for vaporizing sources

  • The INDRA Collaboration
  • B. Borderie
  • F. Gulminelli
  • M.F. Rivet
  • L. Tassan-Got
  • M. Assenard
  • G. Auger
  • F. Bocage
  • R. Bougault
  • R. Brou
  • Ph. Buchet
  • J. Colin
  • R. Dayras
  • A. Demeyer
  • J.D. Frankland
  • E. Galichet
  • E. Genouin-Duhamel
  • E. Gerlic
  • M. Germain
  • D. Guinet
  • P. Lautesse
  • J.L. Laville
  • J.F. Lecolley
  • T. Lefort
  • R. Legrain
  • N. Le Neindre
  • M. Louvel
  • A.M. Maskay
  • L. Nalpas
  • A.D. Nguyen
  • M. Parlog
  • E. Plagnol
  • A. Rahmani
  • T. Reposeur
  • E. Rosato
  • F. Saint-Laurent
  • S. Salou
  • J.C. Steckmeyer
  • M. Stern
  • G. Tabacaru
  • B. Tamain
  • O. Tirel
  • D. Vintache
  • C. Volant
Heavy ion physics

Abstract:

Vaporized sources produced in collisions between 36Ar and 58Ni at 95 MeV per nucleon have been detected with the multidetector INDRA. Complete information concerning the deexcitation properties of quasi-projectiles, including second moments of chemical composition, is compared to a quantum statistical model describing a gas of fermions and bosons in thermal and chemical equilibrium. Inclusions in the calculation of all known discrete levels of nuclear species which deexcite into light particles and of a final state excluded volume interaction are found decisive to very well reproduce the experimental data, which strongly supports that thermodynamical equilibrium was achieved at freeze-out for such sources.

PACS: 25.70.-z Low and intermediate energy heavy-ion collisions – 24.60.-k Statistical theory and fluctuations – 25.70.Pq Multifragment emission and correlations 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • The INDRA Collaboration
  • B. Borderie
    • 1
  • F. Gulminelli
    • 2
  • M.F. Rivet
    • 1
  • L. Tassan-Got
    • 1
  • M. Assenard
    • 3
  • G. Auger
    • 4
  • F. Bocage
    • 2
  • R. Bougault
    • 2
  • R. Brou
    • 2
  • Ph. Buchet
    • 5
  • J. Colin
    • 2
  • R. Dayras
    • 5
  • A. Demeyer
    • 6
  • J.D. Frankland
    • 1
  • E. Galichet
    • 6
  • E. Genouin-Duhamel
    • 2
  • E. Gerlic
    • 6
  • M. Germain
    • 3
  • D. Guinet
    • 6
  • P. Lautesse
    • 6
  • J.L. Laville
    • 3
  • J.F. Lecolley
    • 2
  • T. Lefort
    • 2
  • R. Legrain
    • 5
  • N. Le Neindre
    • 2
  • M. Louvel
    • 2
  • A.M. Maskay
    • 6
  • L. Nalpas
    • 5
  • A.D. Nguyen
    • 2
  • M. Parlog
    • 7
  • E. Plagnol
    • 1
  • A. Rahmani
    • 3
  • T. Reposeur
    • 3
  • E. Rosato
    • 8
  • F. Saint-Laurent
    • 4
  • S. Salou
    • 4
  • J.C. Steckmeyer
    • 2
  • M. Stern
    • 6
  • G. Tabacaru
    • 7
  • B. Tamain
    • 2
  • O. Tirel
    • 4
  • D. Vintache
    • 2
  • C. Volant
    • 5
  1. 1.Institut de Physique Nucléaire, IN2P3-CNRS, 91406 Orsay cedex, FranceFR
  2. 2.LPC, IN2P3-CNRS, ISMRA et Université, 14050 Caen cedex, FranceFR
  3. 3.SUBATECH, Ecole des Mines, IN2P3-CNRS et Université, 44072 Nantes cedex 03, FranceFR
  4. 4.GANIL (DSM-CEA/IN2P3-CNRS), B.P.5027, 14021 Caen cedex, FranceFR
  5. 5.DAPNIA/SPhN, CEA/Saclay, 91191 Gif sur Yvette cedex, FranceFR
  6. 6.Institut de Physique Nucléaire, IN2P3-CNRS et Université, 69622 Villeurbanne cedex, FranceFR
  7. 7.National Institute for Physics and Nuclear Engineering, 76900 Bucharest-Magurele, RomaniaRO
  8. 8.Dipartimento di Scienze Fisiche e Sezione INFN, Univ. di Napoli “Federico II”, 80126 Napoli, ItalyIT

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