Author/Authors :
Rogalla، نويسنده , , D and Theis، نويسنده , , S and Campajola، نويسنده , , L and DʹOnofrio، نويسنده , , A and Gialanella، نويسنده , , L and Greife، نويسنده , , U and Imbriani، نويسنده , , G and Ordine، نويسنده , , A and Roca، نويسنده , , V and Rolfs، نويسنده , , C and Romano، نويسنده , , M and Sabbarese، نويسنده , , C and Schümann، نويسنده , , F and Strieder، نويسنده , , F and Terrasi، نويسنده , , F and Trautvetter، نويسنده , , H.P، نويسنده ,
Abstract :
For improved measurements of the key astrophysical reaction 12C(α, γ)16O in inverse kinematics, a recoil separator ERNA is developed to detect directly the 16O recoils with nearly 100% efficiency. Since the 12C projectiles and the 16O recoils have essentially the same momentum and since the 12C ion beam emerging from an accelerator usually passes through a momentum filter, a sufficient absence of an 16O beam contaminant in the 12C ion beam is of utmost importance for ERNA. In the present work, a Wien filter together with a ΔE−E telescope are used to investigate the beam contaminants accompanying a momentum-filtered 12C ion beam and to measure the level of ion beam purification achievable with the Wien filter.
