Gamma decay of pygmy states in $^{90,94}$Zr from inelastic scattering of light ions

F.C.L. Crespi , A. Bracco , A. Tamii , N. Blasi , F. Camera , O. Wieland , N. Aoi , D. Balabanski , S. Bassauer , A.S. Brown , M.P. Carpenter , J.J. Carroll , M. Ciemala , A. Czeszumska , P.J. Davies , L. Donaldson , Y. Fang , H. Fujita , G. Gey , T.H. Hoang , N. Ichige , E. Ideguchi , A. Inoue , J. Isaak , C. Iwamoto , D.G. Jenkins , O.H. Jin , T. Klaus , N. Kobayashi , T. Koike , M. Krzysiek , M. Kumar Raju , M. Liu , A. Maj , D. Montanari (1) , L. Morris , S. Noji , S.G. Pickstone , D. Savran , M. Spieker , G. Steinhilber , C. Sullivan , B. Wasilewska , V. Werner , T. Yamamoto , Y. Yamamoto , X. Zhou , S. Zhu

1 IPHC - Institut Pluridisciplinaire Hubert Curien

We performed experiments to study the low-energy part of the E1 response (Pygmy Dipole Resonance) in $^{90,94}$Zr nuclei, by measuring the (p,p’γ) and (α,α’γ) inelastic scattering reactions at energies Ebeam,p = 80 MeV and Ebeam,α = 130 MeV respectively. The inelastically scattered particles were measured by employing the high-resolution spectrometer Grand Raiden. The gamma-rays emitted following the de-excitation of the Zr target nuclei were detected using both the clover type HPGe detectors of the CAGRA array and the large volume LaBr3:Ce scintillation detectors from the HECTOR+ array. Some preliminary results are presented here.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

F.C.L. Crespi, A. Bracco, A. Tamii, N. Blasi, F. Camera, et al.. Gamma decay of pygmy states in $^{90,94}$Zr from inelastic scattering of light ions. International Workshop: Nuclear Reactions on Nucleons and Nuclei, Oct 2017, Messina, Italy. pp.012002, ⟨10.1088/1742-6596/1014/1/012002⟩. ⟨hal-02165531⟩