Confirmation of Giant Pairing Vibration evidence in 12,13C(18O,16O)14,15C reactions at 275 MeV

• Published in: The European physical journal. A, Hadrons and nuclei Hadrons and nuclei, 2021, Vol.57 (1)
• Main Authors: Cappuzzello, F., Carbone, D., Cavallaro, M., Spatafora, A., Ferreira, J. L., Agodi, C., Linares, R., Lubian, J.
• Format: Article
• Language: English
• Subjects: Centroids; Cluster Structure and Dynamics of Nuclei - A Tribute to Mahir Hussein; Energy spectra; Even-even nuclei; Hadrons; Heavy Ions; Nuclear Fusion; Nuclear Physics; Nuclei (nuclear physics); Nucleons; Particle and Nuclear Physics; Physics; Physics and Astronomy; Regular Article - Experimental Physics; Transition probabilities; Vibration
• ISSN: 1434-6001; 1434-601X
• DOI: 10.1140/epja/s10050-021-00345-7

The Giant Pairing Vibration (GPV) is a correlated two-nucleon excitation mode in atomic nuclei predicted long time ago. It is expected to be excited in two-nucleon transfer reactions, similarly to the pairing vibrations feeding the ground states of even-even nuclei near shell-closure. Recent experiments have provided evidence for this mode in 14 C and 15 C nuclei populated via 12 C, 13 C( 18 O, 16 O) 14 C, 15 C two-neutron transfer reactions at 84 MeV beam energy. In the present paper, new data show the persistence of the same structures in the energy spectra of 14 C and 15 C populated by the same reactions at a higher bombarding energy of 275 MeV. The extracted centroid, width, spin-parity and transition probability fully agree with the previous observation thus giving a robust confirmation that the GPV mode is populated in such transfer reactions.