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Production of α-particle condensate states in heavy-ion collisions

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arxiv 1009.1267 v1 pith:APTPBXA3 submitted 2010-09-07 nucl-ex nucl-th

Production of α-particle condensate states in heavy-ion collisions

classification nucl-ex nucl-th
keywords alphaparticlestatestatescondensateexcitedacceptinganalyze
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The fragmentation of quasi-projectiles from the nuclear reaction $^{40}Ca$ + $^{12}C$ at 25 MeV/nucleon was used to produce excited states candidates to $\alpha$-particle condensation. The experiment was performed at LNS-Catania using the CHIMERA multidetector. Accepting the emission simultaneity and equality among the $\alpha$-particle kinetic energies as experimental criteria for deciding in favor of the condensate nature of an excited state, we analyze the $0_2^+$ and $2_2^+$ states of $^{12}$C and the $0_6^+$ state of $^{16}$O. A sub-class of events corresponding to the direct 3-$\alpha$ decay of the Hoyle state is isolated.

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