Search for low lying dipole strength in the neutron rich nucleus $^{26}$Ne

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dc.creatorGibelin, J.
dc.creatorBeaumel, D.
dc.creatorMotobayashi, T.
dc.creatorAoi, N.
dc.creatorBaba, H.
dc.creatorBlumenfeld, Y.
dc.creatorElekes, Z.
dc.creatorFortier, S.
dc.creatorFrascaria, N.
dc.creatorFukuda, N.
dc.creatorGomi, T.
dc.creatorIshikawa, K.
dc.creatorKondo, Y.
dc.creatorKubo, T.
dc.creatorLima, V.
dc.creatorNakamura, T.
dc.creatorSaito, A.
dc.creatorSatou, Y.
dc.creatorTakeshita, E.
dc.creatorTakeuchi, S.
dc.creatorTeranishi, T.
dc.creatorTogano, Y.
dc.creatorVinodkumar, A. M.
dc.creatorYanagisawa, Y.
dc.creatorYoshida, K.
dc.date2007-05-12
dc.date.accessioned2026-07-07T08:01:07Z
dc.date.available2026-07-07T08:01:07Z
dc.descriptionCoulomb excitation of the exotic neutron-rich nucleus $^{26}$Ne on a $^{nat}$Pb target was measured at 58 A.MeV in order to search for low-lying E1 strength above the neutron emission threshold. Data were also taken on an $^{nat}$Al target to estimate the nuclear contribution. The radioactive beam was produced by fragmentation of a 95 A.MeV $^{40}$Ar beam delivered by the RIKEN Research Facility. The set-up included a NaI gamma-ray array, a charged fragment hodoscope and a neutron wall. Using the invariant mass method in the $^{25}$Ne+n channel, we observe a sizable amount of E1 strength between 6 and 10 MeV. The reconstructed $^{26}$Ne angular distribution confirms its E1 nature. A reduced dipole transition probability of B(E1)=0.49$\pm$0.16 $e^2fm^2$ is deduced. For the first time, the decay pattern of low-lying strength in a neutron-rich nucleus is obtained. The results are discussed in terms of a pygmy resonance centered around 9 MeV.
dc.identifierhttps://arxiv.org/abs/0705.1753
dc.identifierhttp://arxiv.org/abs/0705.1753
dc.identifier2nd International Conference on Collective Motion in Nuclei under Extreme Conditions - COMEX 2, Sankt Goar (2007) 153-158
dc.identifierdoi:10.1016/j.nuclphysa.2007.01.076
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/128853
dc.subjectNuclear Experiment
dc.titleSearch for low lying dipole strength in the neutron rich nucleus $^{26}$Ne
dc.typetext

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