A new high efficiency array of C₆D₆ detectors for capture cross section measurements at GELINA

Abstract

Abstract. Neutron capture cross section measurements at the Geel Electron Linear Accelerator (GELINA) rely on the use of H-free deuterated benzene C 6 D 6 liquid scintillators. A new design of Aluminium canned C 6 D 6 detectors was studied to improve the performances (high gamma efficiency vs. low neutron sensitivity) of the cylindrical previous ones: on the basis of a truncated 5-sides pyramid, the new detectors were developed and tested in Geel, and used in a preliminary capture cross section measurement on 197 Au in a 4 detectors setup.

Investigations for the use of the fast digitizers with detectors for radiative capture measurements at GELINA

“…Borella et al [9] and Sage et al [8] reported on the response functions of the C 6 D 6 detectors that are used for capture cross-section measurements at GELINA with the conventional acquisition system. Many authors already demonstrated that reliable detector responses can be calculated by Monte Carlo simulations, provided that the geometry input file reflects the measurement conditions and the light output function and resolution are defined.…”

“…In Refs. [8,9] the quality of response functions obtained by Monte Carlo simulations, using the MCNP code, is discussed by comparison with experimental response functions for quasi-mono-energetic gamma-ray sources.…”

“…Two different types of C 6 D 6 detectors are used: a truncated 5-sides 12.5 cm high pyramid shape filled with 2.8 l C 6 D 6 [8] and a cylindrical shape (10 cm diameter and 7.5 cm height) filled with 0.6 l [1,9]. Both types are coupled to an EMI9823KQ photomultiplier tube (PMT) through a boron free quartz window.…”

Non-destructive bulk analysis of the Buggenum sword by neutron resonance capture analysis and neutron diffraction

“…At the 12.38 m station a new system of ten large C 6 D 6 scintillation detectors [7] arranged in a dodecaeder configuration has been installed. To determine the elemental composition at different places of the object, the sword was placed in an automated scanning system, which was linked to the data acquisition system.…”