Details

Autor(en) / Beteiligte

• Bagchi, S.
• Akimune, H.
• Gibelin, J.
• Harakeh, M. N.
• Kalantar-Nayestanaki, N.
• Achouri, N. L.
• Bastin, B.
• Boretzky, K.
• Bouzomita, H.
• Caamaño, M.
• Càceres, L.
• Damoy, S.
• Delaunay, F.
• Fernández-Domínguez, B.
• Fujiwara, M.
• Garg, U.
• Grinyer, G. F.
• Kamalou, O.
• Khan, E.
• Krasznahorkay, A.
• Lhoutellier, G.
• Libin, J. F.
• Lukyanov, S.
• Mazurek, K.
• Najafi, M. A.
• Pancin, J.
• Penionzhkevich, Y.
• Perrot, L.
• Raabe, R.
• Rigollet, C.
• Roger, T.
• Sambi, S.
• Savajols, H.
• Senoville, M.
• Stodel, C.
• Suen, L.
• Thomas, J. C.
• Vandebrouck, M.
• Walle, J. Van de

Titel

Signature of a possible α-cluster state in N=Z doubly-magic 56Ni

Ist Teil von

• The European physical journal. A, Hadrons and nuclei, 2020, Vol.56 (11)

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• An inelastic α -scattering experiment on the unstable N = Z , doubly-magic 56 Ni nucleus was performed in inverse kinematics at an incident energy of 50 A.MeV at GANIL. High multiplicity for α -particle emission was observed within the limited phase-space of the experimental setup. This observation cannot be explained by means of the statistical-decay model. The ideal classical gas model at kT = 0.4 MeV reproduces fairly well the experimental momentum distribution and the observed multiplicity of α particles corresponds to an excitation energy around 96 MeV. The method of distributed m α -decay ensembles is in agreement with the experimental results if we assume that the α -gas state in 56 Ni exists at around 113 - 17 + 15   MeV. These results suggest that there may exist an exotic state consisting of many α particles at the excitation energy of 113 - 17 + 15  MeV.