A large-solid-angle high-resolution recoil mass spectrometer optimized for use with Gammasphere

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Abstract

A large-solid-angle, high-resolution, recoil mass spectrometer has been designed for use with heavy ion beams from the Holifield heavy-ion facility at Oak Ridge National Laboratory. The design has been coordinated with the Gammasphere detector project such that the spectrometer will operate with this 110-element germanium detector array at its target or focal-plane positions with minimum loss of gamma-ray solid angle. The spectrometer has been designed with the specific intention of using inverse kinematic reactions, and the special problems that this entails and their solutions are discussed. The use of inverse kinematics tremendously enhances the capabilities of the spectrometer and selected examples will be discussed.

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Partial support from the Welch Foundation.

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