Lifetime measurements of the second $2^+$ state in neutron-rich ${}^{16}C$ and ${}^{20}O$ with the AGATA+PARIS+VAMOS setup.

Ziliani S., Ciemala M., Crespi F., Leoni S., Fornal B., Maj A., Menendez J., Bednarczyk P., Benzoni G., Bracco A., Boiano C., Bottoni S., Brambilla S., Bast M., Beckers M., Braunroth T., Camera F., Cieplicka-Orinczak N., Clément E., Dorvaux O., Erturk S., De France G., Goldkuhle A., Grebosz J., Harakeh M.N., Holt J., Iskra L., Jacquot B., Karpov A., Kicienska-Habior M., Kim Y., Kmiecik M., Lemasson A., Lewitowicz M., Li H., Matea I., Matejska-Minda M., Mazurek K., Michelagnoli C., Million B., Müller-Gatermann C., Nanal V., Napiorkowski P., Napoli D.R., Rejmund M., Schmitt Ch., Schwenk A., Simonis J., Stanoiu M., Stroberg R.S., Stefan I., Wasilewska B., Zielinska M., per le collaborazioni AGATA, VAMOS, PARIS

Comunicazione
I - Fisica nucleare e subnucleare
Aula Palazzo dell'Emiciclo - Sala Ipogea - Mercoledì 25 h 10:00 - 13:00
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Electromagnetic transitions, especially in neutron-rich nuclei, can be remarkably powerful in testing first-principle nuclear structure theories. An experiment exploiting the excellent performances of the AGATA gamma-tracking array, coupled to the PARIS scintillator array and to the VAMOS++ magnetic spectrometer has been performed to measure the lifetime of the second $2^+$ states in ${}^{20}O$ and ${}^{16}C$, employing the reaction ${}^{18}O$ (7.0 MeV/A) + ${}^{181}Ta$. The contribution will report on the results of this experiment, describing the novel technique used to extract the lifetimes in the tens to hundreds femtosecond range, and the agreement with predictions of ab initio calculations using two- and three-nucleon interactions.

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