Speaker
Mr
Michal Ciemala
(Institute of Nuclear Physics PAN, Poland)
Description
Traditionally gamma-ray spectroscopy has gone down two routes: scintillator detectors offering high efficiency but low resolution, while high-purity germanium detectors offer very high energy resolution at the expense of low efficiency. Recently, a third option presents itself in terms of novel scintillators such as lanthanum bromide which offer unprecedentedly high energy resolution and ideal scintillator properties, but at high intrinsic cost.
PARIS is a novel 4p calorimeter designed to make extensive use of novel scintillator materials such as lanthanum bromide. PARIS is intended to detect gamma rays in the range from 100 keV to 50 MeV at future ISOL facilities such as SPIRAL2. The challenge is to get the best performance from the novel scintillator while minimising the cost of the project. An attractive avenue of investigation is the phoswich detector where a smaller crystal of e.g. LaBr3 is coupled to a longer crystal of CsI or NaI. Such a design brings with it challenges in terms of choice of photomultiplier tube which must be linear over a very large range, and pulse-shape analysis is mandatory to fully deconvolve the two signals.
The present status of PARIS will be given and the principal lessons learned from the ongoing R&D programme will be discussed. The prospects for PARIS will be outlined.
Primary author
Dr
David Jenkins
(University of York)
