Neutron detection in nuclear astrophysics experiments: study of organic liquid scintillators

6th Young Researcher Meeting, L'Aquila 2015

Ciani, Giovanni Francesco^1,2,3

Università Degli Studi di Bari, Piazza Umberto I, 1, Bari

70121, Italy^1

INFN, Laboratori Nazionali Del Gran Sasso, Via Acitelli 22, L'Aquila

67100, Italy^2

Gran Sasso Science Institute (INFN), Viale Francesco Crispi 7, L'Aquila

67100, Italy^3

关键词: GEANT4 simulation;    Neutron detection;    Neutron energy;    Neutron spectra;    Nuclear astro-physics;    Organic liquid scintillator;    Pulse shape discrimination;    Zero crossing methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/689/1/012016/pdf
DOI  :  10.1088/1742-6596/689/1/012016

来源: IOP

【 摘 要 】

In order to study the nuclear reaction13C(α,n)16O, crucial for the nucleosynthesis of heavy nuclei (A>58), the LUNA collaboration at Laboratori Nazionali del Gran Sasso, is looking for the best neutron detector to use in the set up. One of the possibilities is to use detectors based on cell filled with Organic Liquid Scintillator BC501A. These detectors are sensible to fast neutron, but also to gamma rays. A Pulse Shape Discrimination process using the Zero Crossing method has been performed to select only signals from neutrons. Comparing the neutron spectra after the Pulse Shape Discrimination and the spectrum from a GEANT4 simulations, the efficiency of the BC501A, in function of the neutron energy and varying the light threshold, has been evaluated.