Apparatus for in-beam hyperfine interactions and g-factor measurements: Design and operation
2019
Abstract The design and operation of apparatus for measurements of in-beam hyperfine interactions and nuclear excited-state
g factorsis described. This apparatus enables a magnetic field of about 0.1 tesla to be applied to the target and the target temperature to be set between ∼ 4 K and room temperature. Design concepts are developed mainly in terms of transient-field
g-
factormeasurements following
Coulomb excitationby the implantation perturbed angular correlation (IMPAC) technique. The formalism for perturbed angular correlations is outlined and a figure of merit for optimizing these measurements is derived to
inform design. Particle detection is based on the use of silicon photodiodes of rectangular shape. The particle- γ angular correlation formalism for this case is described. The experimental program to date includes temperature-dependent studies of hyperfine fields, transient-field
g-
factormeasurements, and time-dependent perturbed angular distribution (TDPAD) studies.
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