1. Detectors in the FASA experiments
Piotr Morawski
Supervisor:
dr Waldemar Karcz

2. Presentation’s outline
Detectors setup
FASA experiment
Detectors characterisctic

3. Detectors setup - location

4. Detectors setup - schema
64 thin scintillators (CsI(Tl))
30 telescopes - dE(gas)xE(Si(Al))

5. Detectors setup – pictures - 1

6. Detectors setup – pictures - 2

7. FASA experiment - introduction
Field of research:
Thermal multifragmentation
Nuclear phase transitions (liquid-gas, liquid-fog)

8. FASA experiment - Thermal multifragmentation
Thermal multifragmentation is an exotic multibody decay, which is the main decay channel for a hot nuclear systems
Due to multifragmentation the hot nuclei (E* ~ 500 – 700MeV) emits many intermediate mass fragments (IMF)

9. FASA experiment - Thermal multifragmentation
This plot gives us the information on the particle charge and energy
Measuring charge characteristic give us the value of ρt
Measuring energy characteristic give us the value of ρf

10. FASA experiment - Nuclear fase transitions - 1
We use term phase transition in nuclear physics because similarity between Van der Waals force and nuclear force (liquid drop model)
Liquid – normal state of nuclear matter in nuclei
Fog – mixed state of liquid droplets (IMF) and nuclear gas

11. FASA experiment - Nuclear phase transitions - 2
Liquid – gas transition takes place at temperature Tc = 20±3 MeV
Liquid – fog transition takes place at temperature Tb = 5-7 MeV

12. Detectors characterisctic
B = ±1.02

13. Detectors characterisctic

14. Detectors characterisctic

15. The End I’d like to thanks: Dr Waldemar Kracz
Director Dmitri V. Fursaev
Dr Wladislaw Chmielowski
Dr Roman Zawodny