Evidence for $\alpha$-particle condensation in nuclei from the Hoyle state deexcitation

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:10.1016/j.physletb.2011.10.008

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arXiv · 1110.1617

Evidence for $\alpha$-particle condensation in nuclei from the Hoyle state deexcitation

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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. Complete kinematic characterization of individual decay events, made possible by a high-granularity 4$\pi$ charged particle multi-detector, reveals that 7.5$\pm$4.0% of the particle decays of the Hoyle state correspond to direct decays in three equal-energy $\alpha$-particles.

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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. 2011-10-07. Evidence for $\alpha$-particle condensation in nuclei from the Hoyle state deexcitation. https://doi.org/10.1016/j.physletb.2011.10.008

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