234 articles – 1763 Notices  [english version]
 HAL : in2p3-00006076, version 1
 International nuclear physics conference INPC 98, Paris : France
 Exotic clustering and Halo states in $^{12,14}$Be
 (1999)
 The nuclei $^{12}$Be and $^{14}$Be have been investigated using breakup reactions on p, $^{12}$C and $^{208}$Pb targets. The decay of $^{12}$Be into two helium clusters ($^6$He+$^6$He and $^4$He+$^8$He) was observed from a series of excited states between 10 and 25 MeV with spins in the range 4 to 8h, consistent with a deformed “molecular” structure. In the case of $^{14}Be, narrow forward peaked single-neutron angular distributions were were observed for the breakup to$^{12}Be. Analysis of the associated neutron-neutron correlations indicate an RMS separation for the halo neutrons of around 5 fm.
 équipe(s) de recherche : structure nucléaire
 Thème(s) : Physique/Physique Nucléaire Expérimentale
 in2p3-00006076, version 1 http://hal.in2p3.fr/in2p3-00006076 oai:hal.in2p3.fr:in2p3-00006076 Contributeur : Sandrine Guesnon <> Soumis le : Lundi 18 Septembre 2000, 12:12:05 Dernière modification le : Lundi 12 Septembre 2005, 13:38:26