Constraints on the time-scale of nuclear breakup from thermal hard-photon emission - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles European Physical Journal A Year : 2006

Constraints on the time-scale of nuclear breakup from thermal hard-photon emission

D. Baiborodin
  • Function : Author
J. Diaz
  • Function : Author
F. Fernandez
  • Function : Author
H. Loehner
  • Function : Author
T. Matulewicz
  • Function : Author
R. W. Ostendorf
  • Function : Author
S. Schadmand
  • Function : Author
P. Tlusty
  • Function : Author
R. Turrisi
  • Function : Author
V. Wagner
  • Function : Author
H. W. Wilschut
  • Function : Author
N. Yahlali
  • Function : Author

Abstract

Measured hard photon multiplicities from second-chance nucleon-nucleon collisions are used in combination with a kinetic thermal model, to estimate the break-up times of excited nuclear systems produced in nucleus-nucleus reactions at intermediate energies. The obtained nuclear break-up time for the $^{129}${Xe} + $^{nat}${Sn} reaction at 50{\it A} MeV is $\Delta$$\tau$ $\approx$ 100 -- 300 fm/$c$ for all reaction centralities. The lifetime of the radiating sources produced in seven other different heavy-ion reactions studied by the TAPS experiment are consistent with $\Delta$$\tau$ $\approx$ 100 fm/$c$, such relatively long thermal photon emission times do not support the interpretation of nuclear breakup as due to a fast spinodal process for the heavy nuclear systems studied.

Dates and versions

in2p3-00089909 , version 1 (24-08-2006)

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Cite

R. Ortega, D. d'Enterria, Gines Martinez Garcia, D. Baiborodin, H. Delagrange, et al.. Constraints on the time-scale of nuclear breakup from thermal hard-photon emission. European Physical Journal A, 2006, 28, pp.161-171. ⟨10.1140/epja/i2005-10277-9⟩. ⟨in2p3-00089909⟩
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