The R2 experiment: Ar+Au @ 60 AMeV

Thermal photons: A new probe of hot and dense nuclear matter

• "Thermal bremsstrahlung probing nuclear multifragmentation in nucleus-nucleus collisions around the Fermi energy". Barcelona, 5th May 2000. (SLIDES)

• Study of production in heavy-ion reactions at intermediate energies in connection with processes.
• Measurement of exclusive hard photon spectra in coincidence with LCP (light charged particles) and IMF (intermediate mass fragments) for the system Ar+Au at 60 AMeV.

• CRIS 2000 (Catania): Thermal bremsstrahlung probing the thermodynamical state of multifragmenting systems (26/05/00)
• TAPS Workshop 99 (Rez near Prague): Thermal hard-photons emission from multifragment reactions (6/09/99)
• Experimental Nuclear Physics in Europe (Sevilla): Thermal hard photons from hot fragmenting nuclei (23/06/99)
• Colloque Ganil: Thermal hard photons: a new probe of hot and dense nuclear matter (17/05/99)
• Bormio Meeting: Thermal bremsstrahlung in HI reactions at Fermi energies (23/01/99)
• KVI Report 98: Thermal photons emitted from fragmenting hot nuclei
• Gordon Conference 98: Hard photons in multifragment reactions (16/06/98)
• KVI Report 97: Thermal photons: a new probe of hot and dense nuclear matter
• UAB seminar: Study of the reaction Ar+Au @ 60A MeV (28/01/98)

• TAPS Meeting: KVI R2 experiment (31/03/99)
• TAPS Meeting: Status of KVI R2 experiment (23/01/99)

• AGOR (KVI´s "Accelerator Groningen Orsay" superconducting K = 600 cyclotron). Delivering Ar beams of E = 60 AMeV and I = 3 nAe.
• TAPS ("Two-Arm Photon Spectrometer"). BaF₂ electromagnetic segmented calorimeter for photon detection covering 20% of 4.
• DB (Washington University "Dwarf Ball"). CsI(Tl)-plastic phoswich multidetector for LCP and IMF detection in 32° < <168°.
• FW (KVI "Forward Wall"). NE115-NE102A phoswich multidetector for  LCP and IMF detection in 2.5°< <25°.

• GANIL: G. Martínez, D.G. d'Enterria ( Universitat Autònoma de Barcelona), Y. Schutz, H. Delagrange, R. Turrisi, D. Bedell, L. Aphecetche and A. Chbihi.   
• KVI: H. Loehner, H. Wilschut, R. Ostendorf, M. Hoefman, M.J. van Goethem, R.  Siemssen, H. Huisman and M. Volkerts.
• NPI Rez: V. Wagner, A. Kugler and P. Tlusty.
• IFIC València: J. Díaz and N. Yahlali.
• Oak Ridge: D. Stracener.
• Giessen: S. Schadmand.

• Reaction properties
• Run information
• FOSTER "master copy" database
• Energy and Time Calibration run sets
• List of triggers

• First experimental results taken on line at KVI (Groningen) from 14 to 29 november 1997.

• TOF monitoring
• Pulse-shape vs Time-of-flight