Multiple alpha coincidences and correlations are studied in the reaction 12C+12C at 95 MeV for fusion–evaporation events completely detected in charge. Two specific channels with carbon and oxygen residues in coincidence with α - particles are addressed, which are associated with anomalously high branching ratios with respect to the predictions of Hauser–Feshbach calculations. Triple alpha emission appears kinematically compatible with a sequential emission from a highly excited Mg. The phase space distribution of α−α coincidences suggests a correlated emission from a Mg compound, leaving an oxygen residue excited above the threshold for neutron decay. These observations indicate a preferential α emission of 24 Mg at excitation energies well above the threshold for 6 −α decay.
Non-statistical decay and α-correlations in the12C+12C fusion–evaporation reaction at 95 MeV / L Morelli; G Baiocco; M D’Agostino; F Gulminelli; M Bruno; U Abbondanno; S Appannababu; S Barlini; M Bini; G Casini; M Cinausero; M Degerlier; D Fabris; N Gelli; F Gramegna; V L Kravchuk; T Marchi; A Olmi; G Pasquali; S Piantelli; S Valdré; Ad R Raduta. - In: JOURNAL OF PHYSICS. G, NUCLEAR AND PARTICLE PHYSICS. - ISSN 0954-3899. - STAMPA. - 41:7(2014), pp. 075108.1-075108.21. [10.1088/0954-3899/41/7/075108]
Non-statistical decay and α-correlations in the12C+12C fusion–evaporation reaction at 95 MeV
MORELLI, LUCA;BRUNO, MAURO;
2014
Abstract
Multiple alpha coincidences and correlations are studied in the reaction 12C+12C at 95 MeV for fusion–evaporation events completely detected in charge. Two specific channels with carbon and oxygen residues in coincidence with α - particles are addressed, which are associated with anomalously high branching ratios with respect to the predictions of Hauser–Feshbach calculations. Triple alpha emission appears kinematically compatible with a sequential emission from a highly excited Mg. The phase space distribution of α−α coincidences suggests a correlated emission from a Mg compound, leaving an oxygen residue excited above the threshold for neutron decay. These observations indicate a preferential α emission of 24 Mg at excitation energies well above the threshold for 6 −α decay.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.