Christian, G; Hutcheon, D; Casandjian, I; Collins, S M; Edwin, A C; Desmarais, E; Greife, U; Katrusiak, A; Lennarz, A; Loria, M; Molló, S; O’Connell, J; Pascu, S; Pedro-Botet, L; Podolyák, Zs; Reed, B J; Regan, P H; Ruiz, C; Shearman, R; Upadhyayula, S; Wagner, L; Williams, M (2025) First in-beam demonstration of a hybrid LaBr3/CeBr3/BGO array to measure radiative capture resonance energies in an extended gas target using a novel time of flight technique. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1072. 170199 ISSN 01689002

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Abstract

We have deployed a new hybrid array of LaBr3, CeBr3, and BGO scintillators for detecting γ rays at the DRAGON recoil separator at TRIUMF. The array was developed to improve γ-ray timing resolution over the existing BGO array. This allows the average position of resonant capture in an extended gas target to be determined with ∼15 mm precision or better, even with five or fewer detected capture events. This, in turn, allows determination of resonant capture energies with statistical uncertainties below ∼1%. Here we report the results of a first in-beam demonstration of the array, measuring the Ecm = 0.4906(3) MeV resonance in the 23Na(p, γ)24Mg reaction, focusing on the timing properties of the array and its anticipated performance in future experiments with radioactive beams.

Item Type:	Article
Keywords:	Gamma-ray detectors ; nuclear astrophysics ; scintilation detectors
Subjects:	Ionising Radiation > Radioactivity
Divisions:	Medical, Marine & Nuclear
Identification number/DOI:	10.1016/j.nima.2024.170199
Last Modified:	22 Jun 2026 14:09
URI:	https://eprintspublications.npl.co.uk/id/eprint/10471