Abstract
The Advanced GAmma Tracking Array (AGATA) has been installed at the GANIL facility, Caen-France. This set-up exploits the stable and radioactive heavy-ions beams delivered by the cyclotron accelerator complex of GANIL. Additionally, it benefits from a large palette of ancillary detectors and spectrometers to address in-beam γ-ray spectroscopy of exotic nuclei. The set-up has been designed to couple AGATA with a magnetic spectrometer, charged-particle and neutron detectors, scintillators for the detection of high-energy γ rays and other devices such as a plunger to measure nuclear lifetimes. In this paper, the design and the mechanical characteristics of the set-up are described. Based on simulations, expected performances of the AGATA 1π array are presented.
Highlights
High-resolution γ-ray spectroscopy plays a major role in nuclear structure, nuclear astrophysics and nuclear-reaction mechanism studies
As stated in the introduction, the AGATA campaign aims at benefiting from the large palette of stable and radioactive beams delivered by the Grand Accélérateur National d′Ions Lourds (GANIL) facility and from a large set of spectrometers and particle detectors
These data are simultaneously stored on the local GANIL disk infrastructure and sent by TCP/IP to a dedicated workstation connected both to the GANIL and AGATA networks
Summary
High-resolution γ-ray spectroscopy plays a major role in nuclear structure, nuclear astrophysics and nuclear-reaction mechanism studies. In recent years, dedicated set-ups coupling large high-purity Ge arrays with ancillary detectors, such as magnetic spectrometers or separators, scintillators for high energy γ-ray detection or fast-timing measurements, or particle detectors, have been developed in large scale heavy-ion facilities Thanks to these improvements, high resolution γ-ray spectroscopy of exotic nuclei was performed with unprecedented sensitivity over the nuclear chart, from light to heavy nuclei, and from the proton to the neutron drip-lines. In-beam γ-ray spectroscopy with post-accelerated radioactive beams from ISOL facilities like SPIRAL1 at GANIL, using nucleon transfer reactions in inverse kinematic or safe Coulomb excitation, are known to provide information of paramount importance for the understanding of these exotic beams These techniques as used at GANIL will greatly benefit from the improved resolving power of a tracking array such as the AGATA 1π array [23]. The GANIL installation benefited from a major effort to commission the system and its performance will be detailed in a separated paper [35,36]
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