Speaker
Description
The rapid neutron-capture (r-) process holds a significant amount of interest as a mode of nucleosynthesis of elements in astrophysical environments. From the standpoint of nuclear physics, ongoing efforts to understand this process includes measurements on 𝛽-delayed-neutron properties of its elements for a more accurate input into calculations in relation to its theoretical modelling.
Typically, 𝛽-𝛾 spectroscopy are conducted with implantation detectors at fragmentation facilities such as Silicon strip detectors (SSDs) at Radioactive Isotope Beam Factory (RIBF). However, the SSDs lack fast timing response for time-of-flight measurements of the emitted neutrons. To address this limitation, a segmented YSO scintillation detector (Z ≈ 35, ρ ≈ 4.5 g/cm^3) was developed and its characteristics enable 3mm correlation radius between implant and 𝛽-decay events at 80% correlation efficiency.
The succes of the YSO detector encouraged the development of 139La-enriched, segmented La-GPS (139La-GPS) scintillation crystal detector (Z ≈ 51, ρ ≈ 5.2 g/cm^3) with the aim of achieving better correlation radius and higher energy resolution than the YSO detector, and faster timing response than the SSDs. This presentation will showcase the ongoing analysis of the 139La-GPS detector to determine its suitability as a new implant-𝛽 detector.