Thermal hard-photons from hot fragmenting nuclei

Journal Article · Tue Nov 16 04:00:00 UTC 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1301829· OSTI ID:21207590

D'Enterria, D G ^[1]; Martinez, G ^[2]

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1. Grup de Fisica de les Radiacions, Universitat Autonoma de Barcelona, 08193 Bellaterra, Catalonia (Spain)
2. Subatech, Ecole des Mines de Nantes, BP 20722, 44307 Nantes Cedex 3 (France)

Hard-photon (E{sub {gamma}}{>=}30 MeV) 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 60A 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.

• OSTI ID: 21207590
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 495; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ARGON 36 REACTIONS
BREMSSTRAHLUNG
CARBON 12 TARGET
COINCIDENCE SPECTROMETRY
GAMMA SPECTROSCOPY
GOLD 197 TARGET
MEV RANGE
NICKEL 58 TARGET
NUCLEAR FRAGMENTATION
NUCLEAR FRAGMENTS
NUCLEAR MATTER
NUCLEON-NUCLEON INTERACTIONS
PHOTON EMISSION
PHOTONS
SHOWER COUNTERS
SILVER 107 TARGET