NEDA (Neutron Detector Array) will be available for experiments at the Heavy Ion Laboratory (HIL) of the University of Warsaw during a period of about 1 year, starting in the second half of 2022. NEDA will be connected to the EAGLE gamma-ray spectrometer. The primary application of the NEDA-EAGLE setup (nicknamed NEEDLE) will be to study proton rich nuclei using fusion-evaporation reactions, with NEDA serving as a neutron multiplicity filter.
A workshop aimed at the discussion of experimental projects employing NEEDLE will be held at HIL on 20-21 October 2021. This will be followed by a PAC meeting, foreseen for December 2021 or January 2022.
The NEEDLE setup is shown in the figure below. It will consist of 15 HPGe EAGLE detectors (grey dewars are visible) and 51 NEDA detectors (shown in brown).
Expected detection efficiencies:
EAGLE photopeak efficiency : eff(γ) = 1.5%
NEDA: eff(1n) = 20-25%, eff(2n) = 2%
Beams available at HIL are listed here. Work on new beams, 58Ni in particular, is in progress. Further information will be available in fall 2021.
The NEutron Detection Array NEDA was constructed by an international collaboration in years 2008–2018. In 2018 it was used together with the AGATA tracking array at GANIL, Caen, France. In 2023 it will be again connected to AGATA, this time at the Laboratori Nazionali di Legnaro, Legnaro, Italy. See the following papers for further information on NEDA:
J. Valiente-Dobón, et al. NEDA—NEutron Detector Array, Nucl.Instr.Meth. A927, 81 (2019)
G. Jaworski, et al. The new neutron multiplicity filter NEDA and its first physics campaign witg AGATA, Acta Phys. Polonica B50, 585 (2019)
The installation and use of NEDA at HIL is supported by the Polish National Science Center, grants. no 2020/39/D/ST2/00466 and 2017/25/B/ST2/01569.