New gas-filled mode of the large-acceptance spectrometer VAMOS

C. Schmitt (1) , M. Rejmund (1) , A. Navin (1) , B. Lecornu (1) , B. Jacquot (1) , G. de France (1) , A. Lemasson (1) , A. Shrivastava (1) , P. Greenlees (2) , J. Uusitalo (2) , K. Subotic (3) , L. Gaudefroy (4) , Ch. Theisen (3, 5) , B. Sulignano (5) , O. Dorvaux (6) , L. Stuttgé (6)

1 GANIL - Grand Accélérateur National d'Ions Lourds
2 JYU - Department of Physics [Jyväskylä Univ]
3 Vinča Institute of Nuclear Sciences
4 DAM/DIF - DAM Île-de-France
5 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
6 IPHC - Institut Pluridisciplinaire Hubert Curien

A new gas-filled operation mode of the large-acceptance spectrometer VAMOS at GANIL is reported. A beam rejection factor greater than 1010 is obtained for the 40Ca+150Sm system at 196 MeV. The unprecedented transmission efficiency for the evaporation residues produced in this reaction is estimated to be around 80% for ®xn channels and above 95% for xnyp channels. A detailed study of the performance of the gasfilled VAMOS and future developments are discussed. This new operation mode opens avenues to explore the potential of fusion reactions in various kinematics.

Mots clés: Gas-filled spectrometer; Fusion reactions; Beam rejection; Transmission

Domaines: Instrumentations et Détecteurs [physics.ins-det]; Physique Nucléaire Expérimentale [nucl-ex]

C. Schmitt, M. Rejmund, A. Navin, B. Lecornu, B. Jacquot, et al.. New gas-filled mode of the large-acceptance spectrometer VAMOS. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2010, 621, pp.558-565. ⟨10.1016/j.nima.2010.03.146⟩. ⟨in2p3-00470415⟩