Prompt-delayed $\gamma$ -ray spectroscopy with AGATA, EXOGAM and VAMOS++

Y.H. Kim (1) , A. Lemasson (1) , M. Rejmund (1) , A. Navin (1) , S. Biswas , C. Michelagnoli (1) , I. Stefan (2) , R. Banik , P. Bednarczyk , S. Bhattacharya , S. Bhattacharyya , E. Clément (1) , H.L. Crawford , G. de France (1) , P. Fallon , J. Goupil (1) , B. Jacquot (1) , H.J. Li (1) , J. Ljungvall (3) , A.O. Macchiavelli , A. Maj , L. Ménager (1) , V. Morel (1) , R. Palit , R.M. Pérez-Vidal , J. Ropert (1) , C. Schmitt (1)

1 GANIL - Grand Accélérateur National d'Ions Lourds
2 IPNO - Institut de Physique Nucléaire d'Orsay
3 CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière

A new experimental setup to measure prompt-delayed $\gamma$ -ray coincidences from isotopically identified fission fragments, over a wide time range of 100ns-200μ s, is presented. The fission fragments were isotopically identified, on an event-by-event basis, using the VAMOS++ large acceptance spectrometer. The prompt $\gamma$ rays emitted at the target position and corresponding delayed $ \gamma$ rays emitted at the focal plane of the spectrometer were detected using, respectively, thirty two crystals of the AGATA $\gamma$ -ray tracking array and seven EXOGAM HPGe Clover detectors. Fission fragments produced in fusion and transfer-induced fission reactions, using a$^{238}$U beam at an energy of 6.2 MeV/u impinging on a$^{9}$Be target, were used to characterize and qualify the performance of the detection system.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

Y.H. Kim, A. Lemasson, M. Rejmund, A. Navin, S. Biswas, et al.. Prompt-delayed $\gamma$ -ray spectroscopy with AGATA, EXOGAM and VAMOS++. Eur.Phys.J.A, 2017, 53 (8), pp.162. ⟨10.1140/epja/i2017-12353-y⟩. ⟨hal-01582819⟩