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Addressing the two-step scenario of high-energy ion collisions with $^{136}$Xe + p and $^{136}$Xe +$^{12}$C at 1 A.GeV in inverse kinematics, at the SPALADiN setup of GSI

Abstract : We have measured at GSI-Darmstadt (Germany) the reactions 136Xe + p and 136Xe +12 C, using the inverse-kinematics technique at 1 A.GeV and the large acceptance SPALADiN setup. The combination of both provides a very good coverage of the phase-space of the excited system decay channels, allowing the study of the relative importance of those decay channels, as well as a very efficient filter to reject from the detection the particles and nuclear fragments of high energy in the projectile centre-of-mass frame, essentially produced in the first-instant nucleon-nucleon collisions, prior to the decay of the excited nuclear system. Our analysis in the two-step scenario permits one to estimate on an event basis E*/A, the excitation energy per nucleon of the decaying nuclear system, and to study the E*/A dependence of the different decay channels. The E*/A range of overlap of the 136Xe + p and 136Xe+12C reactions is large and allows for an extensive comparison between both reactions, and therefore provides a strong test bench of the entrance-channel-independence hypothesis of the excited-system decay. We address the two-step-scenario assumption in the light of our data and their comparison with different up-to-date models
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http://hal.in2p3.fr/in2p3-03196255
Contributor : Michel Lion <>
Submitted on : Monday, April 12, 2021 - 4:18:56 PM
Last modification on : Friday, April 16, 2021 - 3:28:10 AM

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J.E. Ducret. Addressing the two-step scenario of high-energy ion collisions with $^{136}$Xe + p and $^{136}$Xe +$^{12}$C at 1 A.GeV in inverse kinematics, at the SPALADiN setup of GSI. 27th International Nuclear Physics Conference (INPC2019), Jul 2019, Glasgow, United Kingdom. pp.012083, ⟨10.1088/1742-6596/1643/1/012083⟩. ⟨in2p3-03196255⟩

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