MEASUREMENT OF THE NUMBER OF PHOTO ELECTRONS PER MEV FOR NEUTRON DETECTORS

Emre İren,Mustafa Nizametin Erduran,Ferhat Özok

doi:10.36222/ejt.950944

Emre İren, Mustafa Nizametin Erduran + Show 1 more

Open Access

https://doi.org/10.36222/ejt.950944

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Abstract

The light gains of a detector system (PMT and scintillator) is characterized by the number of photoelectrons produced per unit of energy (usually MeV). In this study, the results of light gain tests for 10 Hamamatsu R11833 model photomultiplier tubes (PMT) are shown. Various radioactive sources were used in conjunction with the EJ309 liquid scintillator to determine the light gain. The number of photoelectrons produced per unit energy was determined by comparing the size of the signal generated by the photons produced by PMT during the scintillation process using radioactive sources and the size of the signal generated when a single photo electron (SPE) was produced by the PMT. The test results show that the performances of the PMTs are sufficient for neutron detector arrays used in experiments with radioactive ion beams. The supply voltage of the photomultiplier tubes must be changed to achieve similar light gains.

Highlights

Neutrons by their nature do not interact with the electrons of atoms and do not cause ionization or excitation
Proton recoils resulting from neutron interaction are measured with liquid scintillator based neutron detectors
Neutron detector arrays consist of a large number of detectors covering a large solid angle of about 2π

Summary

INTRODUCTION

Neutrons by their nature do not interact with the electrons of atoms and do not cause ionization or excitation. Proton recoils resulting from neutron interaction are measured with liquid scintillator based neutron detectors These detectors are generally designed for use in experiments with radioactive ion beams. An example of this is the NEutron Detector Array (NEDA) project [1]. These detectors are designed to work with radioactive beam generating systems under construction, such as SPIRAL2 at GANIL [2], SPES at LNL [3], ISOLDE at CERN [4] and FAIR at Darmstadt [5]. It's possible to use very large gamma ray detector arrays as an auxiliary detector system, such as AGATA [6], EXOGAM2 [7], GALILEO [8] and PARIS [9] spectrometers that use both with the test set up established in the Centre for Nuclear detectors and the Robotic Application and Research (NAR)

EXPERIMENTAL SETUP

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RESULTS