TIARA: a large solid angle silicon array for direct reaction studies with radioactive beams

TL;DR

TIARA is a compact silicon detector array designed for studying direct nuclear reactions with radioactive beams, demonstrating high angular coverage and compatibility with gamma-ray and spectrometer systems, validated through inverse kinematics experiments.

Contribution

The paper introduces TIARA, a novel large solid angle silicon array optimized for inverse kinematics reactions with radioactive beams, integrating with existing gamma-ray and spectrometer systems.

Findings

Successful detection of 15N states in inverse kinematics

Good agreement of measured angular distributions with DWBA calculations

Demonstrated compatibility with gamma-ray and spectrometer arrays

Abstract

A compact, quasi-4pi position sensitive silicon array, TIARA, designed to study direct reactions induced by radioactive beams in inverse kinematics is described here. The Transfer and Inelastic All-angle Reaction Array (TIARA) consists of 8 resistive charge division detectors forming an octagonal barrel around the target and a set of double-sided silicon-strip annular detectors positioned at each end of the barrel. The detector was coupled to the -ray array EXOGAM and the spectrometer VAMOS at the GANIL Laboratory to demonstrate the potential of such an apparatus with radioactive beams. The 14N(d,p)15N reaction, well known in direct kinematics, has been carried out in inverse kinematics for that purpose. The observation of the 15N ground state and excited states at 7.16 and 7.86 MeV is presented here as well as the comparison of the measured proton angular distributions with DWBA calculations. Transferred l-values are in very good agreement with both theoretical calculations and previous experimental results obtained in direct kinematics.