PHENIICS Fest 2017

Session

Nuclear physics - experimental

30 mai 2017, 16:45

Amphithéâtre Pierre Lehman (Laboratoire de l'Accélérateur Linéaire (LAL))

Description

Chairperson: Mr. Loïc Thulliez

61. Gamma-ray cascade study in Kr and Ba fission fragments with the EXILL experiment

M. Michal Rapala (CEA Saclay/IRFU/DPhN/LERN)

30/05/2017 16:45

Talk

The poor accuracy of microscopic models in the prediction of fission observables constrains nuclear industry to rely on semi-empirical models, which in turns need systematic and accurate experimental data on a significant number of observables. In the last decade, large efforts were made in the fission community to improve models of the fission process and of the de-excitation of fission...

26. Simultaneous measurement of the neutron-induced 233U capture and fission cross sections

M. Michael Bacak (CEA Saclay, Irfu; CERN)

30/05/2017 17:05

Talk

233U plays the essential role of the fissile nucleus in the Th-U fuel cycle, which has been proposed as a safer and cleaner alternative to the U-Pu fuel cycle. A particularity of 233U is its small neutron capture cross-section which is about one order of magnitude lower than the fission cross-section on average. Therefore, the accuracy in the measurement of the 233U capture cross-section...

5. The study of gamma emission in the fission process

M. Liqiang QI (IPN NESTER)

30/05/2017 17:25

Talk

Prompt fission gamma spectra (PFGS) have been recently measured for the 238U(n,f) and 239Pu (n,f) reactions using fast neutrons produced by the LICORNE directional neutron source. The setup consisted of ionization chambers containing the actinides samples and LaBr3 scintillators to measure the coincident prompt fission gamma rays. Prompt fission gamma rays were discriminated from prompt...

15. Transfer reactions induced with 56Ni: pairing and N=28 shell closure

Mlle Anastasia Georgiadou (IPN)

30/05/2017 17:45

Talk

The experimental study of the neutron-proton pairing is a challenging task that relies on the strength of the physical observables. Binding energies of N = Z nuclei and rotational properties of finite nuclei are some of the tools used up to now. Despite, their robustness to prove other physical phenomena, they are shown to be insufficient to prove the existence of T =0 pairing collectivity. On...

25. First life time measurements in the ${}^{78}$Ni region with AGATA and VAMOS at GANIL

M. Clément DELAFOSSE (IPNO)

30/05/2017 18:05

Talk

Yrast (\textit{i.e.} the state with the lower energy for a given spin-partiy) and near-Yrast states were populated in the ${}^{78}$Ni region by fusion-fission reaction ${}^{238}$U(${}^9$Be,X$\gamma$) at GANIL. The prompt $\gamma$-rays were detected by the AGATA array\footnote{S. Akkoyun \textit{et al.}, \textit{AGATA - Advanced GAmma Tracking Array}, NIM A668 (2012) 26-58} and particle...