Thermal Hard-Photons from Hot Fragmenting Nuclei

Conference · Fri Dec 31 04:00:00 UTC 1999

OSTI ID:785390

d'Enterria, D G; Martinez, G

Hard-photon (E{gamma}{>=}30MeV) production has been studied in four different heavy-ion reactions ({sup 36}Ar+{sup 197}Au,{sup 107}Ag,{sup 58}Ni,{sup 12}C at 60 A MeV) with TAPS electromagnetic calorimeter, in coincidence with LCPs (Z{<=}2) and IMFs (3{<=}Z{<=}20) detected by two phoswich multidetectors. Aside from the main known emission mechanism, pn bremsstrahlung during the first high-density stage, the existence of a component of lower energy bremsstrahlung photons emitted in secondary pn collisions from a thermalizing source is demonstrated. Thermal hard photons arise as a promising probe of the thermodynamical properties of nuclear systems undergoing multifragmentation.

• Research Organization: Grup de Fisica de les Radiacions, Universitat Autonoma de Barcelona, Catalonia (ES); Subatech, Ecole des Mines de Nantes (FR)
• Sponsoring Organization: none (US)
• OSTI ID: 785390
• Report Number(s): none; ISBN 1-56396-907-6; ISSN 0094-243X; CODEN APCPCS; ISBN 1-56396-907-6; ISSN 0094-243X; CODEN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ARGON 36
ARGON 36 REACTIONS
BREMSSTRAHLUNG
BREMSSTRALUNG
CARBON 12
CARBON 12 TARGET
ENERGY SPECTRA
GEV RANGE 01-10
GOLD 197
GOLD 197 TARGET
HEAVY ION REACTIONS
NICKEL 58
NICKEL 58 TARGET
NUCLEAR FRAGMENTATION
NUCLEAR REACTION KINETICS
PHOTON EMISSION
PROTON-NEUTRON INTERACTIONS
SILVER 107
SILVER 107 TARGET