Production of $\alpha$-particle condensate states in heavy-ion collisions

Ad. R. Raduta; B. Borderie; E. Geraci; N. Le Neindre; P. Napolitani; M. F. Rivet; R. Alba; F. Amorini; G. Cardella; M. Chatterjee; E. De Filippo; D. Guinet; P. Lautesse; E. La Guidara; G. Lanzalone; G. Lanzano; I. Lombardo; O. Lopez; C. Maiolino; A. Pagano; S. Pirrone; G. Politi; F. Porto; F. Rizzo; P. Russotto; J. P. Wieleczko

doi:10.1142/s0218301311018939

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arXiv · 1009.1267

Production of $\alpha$-particle condensate states in heavy-ion collisions

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Abstract

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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Ad. R. Raduta, B. Borderie, E. Geraci, N. Le Neindre, P. Napolitani, M. F. Rivet, R. Alba, F. Amorini, G. Cardella, M. Chatterjee, E. De Filippo, D. Guinet, P. Lautesse, E. La Guidara, G. Lanzalone, G. Lanzano, I. Lombardo, O. Lopez, C. Maiolino, A. Pagano, S. Pirrone, G. Politi, F. Porto, F. Rizzo, P. Russotto, J. P. Wieleczko. 2010-09-07. Production of $\alpha$-particle condensate states in heavy-ion collisions. https://doi.org/10.1142/s0218301311018939

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