Signatures of the Giant Pairing Vibration in the 14C and 15C atomic nuclei

F. Cappuzzello (), D. Carbone (), M. Cavallaro, M. Bondì, C. Agodi, F. Azaiez, A. Bonaccorso, A. Cunsolo, L. Fortunato, A. Foti, S. Franchoo, E. Khan, R. Linares, J. Lubian, J. A. Scarpaci and A. Vitturi
Additional contact information
F. Cappuzzello: Università di Catania
D. Carbone: Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
M. Cavallaro: Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
M. Bondì: Università di Catania
C. Agodi: Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
F. Azaiez: Institut de Physique Nucléaire, Université Paris-Sud-11-CNRS/IN2P3
A. Bonaccorso: Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
A. Cunsolo: Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
L. Fortunato: Università di Padova
A. Foti: Università di Catania
S. Franchoo: Institut de Physique Nucléaire, Université Paris-Sud-11-CNRS/IN2P3
E. Khan: Institut de Physique Nucléaire, Université Paris-Sud-11-CNRS/IN2P3
R. Linares: Instituto de Física da Universidade Federal Fluminense, 24210-346 Rio de Janeiro
J. Lubian: Instituto de Física da Universidade Federal Fluminense, 24210-346 Rio de Janeiro
J. A. Scarpaci: Centre de Sciences Nucléaires et de Sciences de la Matières - CSNSM, Université Paris-Sud-11-CNRS/IN2P3
A. Vitturi: Università di Padova

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract Giant resonances are collective excitation modes for many-body systems of fermions governed by a mean field, such as the atomic nuclei. The microscopic origin of such modes is the coherence among elementary particle-hole excitations, where a particle is promoted from an occupied state below the Fermi level (hole) to an empty one above the Fermi level (particle). The same coherence is also predicted for the particle–particle and the hole–hole excitations, because of the basic quantum symmetry between particles and holes. In nuclear physics, the giant modes have been widely reported for the particle–hole sector but, despite several attempts, there is no precedent in the particle–particle and hole–hole ones, thus making questionable the aforementioned symmetry assumption. Here we provide experimental indications of the Giant Pairing Vibration, which is the leading particle–particle giant mode. An immediate implication of it is the validation of the particle–hole symmetry.

Date: 2015
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DOI: 10.1038/ncomms7743

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