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

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.
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http://hal.in2p3.fr/in2p3-00089909
Contributor : Dominique Girod Connect in order to contact the contributor
Submitted on : Thursday, August 24, 2006 - 3:43:23 PM
Last modification on : Tuesday, May 10, 2022 - 3:44:45 PM

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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, EDP Sciences, 2006, 28, pp.161-171. ⟨10.1140/epja/i2005-10277-9⟩. ⟨in2p3-00089909⟩

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