"Optimizing the neutron detection capabilities of NEDA - the NEutron Detector Array for spectroscopy studies"
Grzegorz Jaworski , Heavy Ion Laboratory, University of Warsaw & Faculty of Physics, Warsaw University of Technology
(id #138)
Seminar: NoPoster: Yes
Invited talk: No
Grzegorz Jaworski (on behalf of the NEDA collaboration)
One of the tasks of the SPIRAL2 Preparatory Phase project is to design a new neutron detector system, with the primary aim to improve neutron multiplicity filtering in gamma-ray spectroscopy fusion-evaporation experiments, especially when neutron emission is very rare. The main difficulty in such studies is that one neutron may scatter between two or more detectors in a multi detector system and this can lead to the apparent increase of the number of detected neutrons. As the most exotic, most interesting nuclei are often produced with the emission of two or more neutrons, with very low cross sections, gamma-ray spectra gated by multiple neutrons are usually dominated by events in which neutron multiplicity larger than one was spuriously deduced from interactions of one particle.
Present status of investigations leading to the design of the neutron detector array named NEDA will be shown. The investigations aim at optimizing single detector size, dimensions of the entire array, its granularity, solid angle coverage and timing properties. Possible advantages of using deuterated liquid scintillator instead of standard proton based one are also evaluated. The following three parameters are of utmost importance: i) neutron detection efficiency, ii) quality of the neutron-gamma discrimination, iii) efficient and clean determination of the number of detected neutrons. Application of digital signal processing boards and methods to the analysis of the electronic signals from the neutron detectors are as well studied.
One of the tasks of the SPIRAL2 Preparatory Phase project is to design a new neutron detector system, with the primary aim to improve neutron multiplicity filtering in gamma-ray spectroscopy fusion-evaporation experiments, especially when neutron emission is very rare. The main difficulty in such studies is that one neutron may scatter between two or more detectors in a multi detector system and this can lead to the apparent increase of the number of detected neutrons. As the most exotic, most interesting nuclei are often produced with the emission of two or more neutrons, with very low cross sections, gamma-ray spectra gated by multiple neutrons are usually dominated by events in which neutron multiplicity larger than one was spuriously deduced from interactions of one particle.
Present status of investigations leading to the design of the neutron detector array named NEDA will be shown. The investigations aim at optimizing single detector size, dimensions of the entire array, its granularity, solid angle coverage and timing properties. Possible advantages of using deuterated liquid scintillator instead of standard proton based one are also evaluated. The following three parameters are of utmost importance: i) neutron detection efficiency, ii) quality of the neutron-gamma discrimination, iii) efficient and clean determination of the number of detected neutrons. Application of digital signal processing boards and methods to the analysis of the electronic signals from the neutron detectors are as well studied.
