The & gamma; decay from the 2+2 near-threshold resonance in 14C, lo-cated 142 keV above the neutron emission threshold, was searched for in a fusion -evaporation experiment at Argonne National Laboratory with the GODDESS setup, comprising the GRETINA & gamma;-ray spectrometer coupled to the ORRUBA charged par-ticle detector. The Shell Model Embedded in the Continuum predicts a significant enhancement of the 2+2 & RARR; 0 transition probability, owing to a collectivization of the near-threshold state. The corresponding & gamma; branch is expected to be of the order of 5 x 10-5 , which is comparable with the sensitivity of this experiment.
Searching for the & gamma; decay from the near-neutron threshold 2+ state in 14C: A probe of collectivization phenomena in light nuclei / G. Corbari, S. Bottoni, M. Ciemala, F.C.L. Crespi, S. Leoni, B. Fornal, R.V.F. Janssens, S.D. Pain, M. Siciliano, E. Albanese, A.D. Ayangeakaa, G. Benzoni, S. Carmichael, M. Carpenter, K. Chipps, N. Cieplicka, P. Copp, J. Forson, E. Gamba, L.W. Iskra, H. Jayatissa, F. Kondev, T. Lauritsen, B. Million, C. Muller-Gatermann, A. Palmisano, M. Polettini, C. Porzio, W. Reviol, N. Sensharma, D. Seweryniak, C. Ummel, O. Wieland, G. Wilson, S. Zhu, S. Ziliani. - In: IL NUOVO CIMENTO C. - ISSN 2037-4909. - 46:4(2023 Aug), pp. 90.1-90.4. (Intervento presentato al 108. convegno SIF Congresso Nazionale tenutosi a Milano : 12-16 Settembre nel 2022) [10.1393/ncc/i2023-23090-1].
Searching for the & gamma; decay from the near-neutron threshold 2+ state in 14C: A probe of collectivization phenomena in light nuclei
G. Corbari
Primo
;S. BottoniSecondo
;F.C.L. Crespi;S. Leoni;E. Albanese;E. Gamba;M. Polettini;
2023
Abstract
The & gamma; decay from the 2+2 near-threshold resonance in 14C, lo-cated 142 keV above the neutron emission threshold, was searched for in a fusion -evaporation experiment at Argonne National Laboratory with the GODDESS setup, comprising the GRETINA & gamma;-ray spectrometer coupled to the ORRUBA charged par-ticle detector. The Shell Model Embedded in the Continuum predicts a significant enhancement of the 2+2 & RARR; 0 transition probability, owing to a collectivization of the near-threshold state. The corresponding & gamma; branch is expected to be of the order of 5 x 10-5 , which is comparable with the sensitivity of this experiment.
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