Irfu-10-43 |
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New gas-filled mode of the large-acceptance spectrometer VAMOS |
C. Schmitt, M. Rejmund, A. Navin, B. Lecornu, B. Jacquot, G. de France, A. Lemasson, A. Shrivastava, P. Greenlees, J. Uusitalo, K. Subotic, L. Gaudefroy, Ch. Theisen, B. Sulignano, O. Dorvaux and L. Stuttgé |
A new gas-filled operation mode of the large-acceptance spectrometer VAMOS at GANIL is reported. A beam rejection factor greater than 10^10 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 (alpha)xn channels and above 95% for xnyp channels. A detailed study of the performance of the gas-filled VAMOS and future developments are discussed. This new operation mode opens avenues to explore the potential of fusion reactions in various kinematics. |