Abstract

The Munich recoil spectrometer is an instrument to measure recoiling nuclei at or near zero degrees. The suppression of the projectile intensity is achieved with a Wien-type velocity filter applying a high-frequency electric field synchronized with the pulsed beam. A fast time-of-flight detector and a ΔE− E ionization chamber allow the identification of recoiling nuclei according to their A-and Z-values. The whole system is very compact yielding a high collection efficiency with a broad acceptance in both charge and velocity. Therefore, this spectrometer is especially suited for coincidence measurements of recoils with light particles or gamma rays. But this instrument has also been used to measure sub-Coulomb fusion cross sections down to the μb region.

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