Published 1996 | Version v1
Report Open

Surveying the nuclear caloric curve

Creators

  • 1. Caen Univ., 14 (France). Lab. de Physique Corpusculaire
  • 2. CEA Centre d'Etudes de Saclay, 91 - Gif-sur-Yvette (France). Dept. d'Astrophysique, de la Physique des Particules, de la Physique Nucleaire et de l'Instrumentation Associee
  • 3. Grand Accelerateur National d'Ions Lourds (GANIL), 14 - Caen (France)
  • 4. Paris-11 Univ., 91 - Orsay (France). Inst. de Physique Nucleaire
  • 5. Lyon-1 Univ., 69 - Villeurbanne (France)
  • 6. Centre National de la Recherche Scientifique, 44 - Nantes (France). Lab. de Physique Subatomique et des Technologies Associees

Description

The 4π array INDRA was used to detect nearly all charged products emitted in Ar + Ni collisions between 52 and 95 MeV/u. The charge, mass and excitation energy E* of the quasi-projectiles have been reconstructed event by event. Excitation energies up to 25 MeV per nucleon are reached. Apparent temperatures obtained from several double isotopic yield ratios Tr0 show different dependences upon E*. T06Li7Li-3Heα yields the highest values, as well as the high energy slopes Ts of the kinetic spectra. Two statistical models, sequential evaporation and gas in complete equilibrium, taking into account side feeding and discrete excited states population, show that the data can be explained by a steady increase of the initial temperature with excitation energy without evidence for a liquid-gas phase transition. (authors)

Availability note (English)

MF available from INIS under the Report Number.

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Additional details

Publishing Information

Imprint Pagination
13 p.
Report number
CEA-DAPNIA-SPhN--96-39

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
28065801
Subject category
S73: NUCLEAR PHYSICS AND RADIATION PHYSICS; S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
Descriptors DEI
ANGULAR DISTRIBUTION; ARGON 36 REACTIONS; ENERGY SPECTRA; EVAPORATION; EXCITATION; FOUR-PI COUNTING; GEV RANGE 01-10; ISOTOPE SEPARATION; KINETIC ENERGY; MULTIPLE PRODUCTION; NICKEL 58 TARGET; NUCLEAR FRAGMENTS; NUCLEAR TEMPERATURE; PARTICLE RAPIDITY; PHASE TRANSFORMATIONS; PROJECTILES; STATISTICAL MODELS; THERMAL EQUILIBRIUM; TRANSVERSE MOMENTUM
Descriptors DEC
COUNTING TECHNIQUES; DISTRIBUTION; ENERGY; ENERGY RANGE; ENERGY-LEVEL TRANSITIONS; EQUILIBRIUM; GEV RANGE; HEAVY ION REACTIONS; LINEAR MOMENTUM; MATHEMATICAL MODELS; NUCLEAR REACTIONS; PARTICLE PRODUCTION; PARTICLE PROPERTIES; SEPARATION PROCESSES; SPECTRA; TARGETS

Optional Information

Notes
24 refs.