On behalf of the AIDA collaboration
The Advanced Implantation Detector Array (AIDA) is a state-of-the-art detector system for the measurement of the decay properties of exotic nuclei at fragmentation/fission facilities. Using highly segmented, large area double-sided silicon strip detectors the positions, energies and times of high energy implants and their subsequent low energy decays can be...
For proton-rich nuclei, charged particle emission competes with beta decay and electron capture. One notable region of this competition is the nuclei northeast of 100Sn, where alpha-decay becomes prominent, and the proton drip line competes with proton emitters; see the cases of as 109I and 108I [1,2]. With decreasing half-lives close to the drip line, scintillators become optimal for...
Scintillator-based detection systems are in wide use since many years and in many applications ranging from nuclear and particle physics experiments to medical imaging and security. Their physical properties like density, light yield, linearity of the detector response and operational speed, but also their resistance to harsh radiation load, their insensitivity to small changes in operational...
DESPEC experiments aim at a detailed study of the decay mechanisms in the most exotic nuclear species at reach at GSI/FAIR, with the measurements of decay half-lives, competing decay modes, and isomeric state identification. For the DESPEC experimental program, ions will be stopped in an active implanter and their subsequent decays will be measured. The active implanter’s role is to stop the...
DEcay SPECtroscopy (DESPEC) experiments [1] are part of the NUSTAR collaboration, one of the four scientific pillars of the FAIR/GSI facility. Those experiments aim at studing the properties of exotic nuclei using high- resolution decay spectroscopy. They are currently performed at the FRagment Separator (FRS) and will be, in the future, at the Super-FRS facility at FAIR, at GSI. The DESPEC...
The detection of heavy ions and light particles in inorganic scintillators has been recently implemented in fragmentation facilities for measurements of beta decay and charged particle emission. One of the challenges of using scintillators in these experiments is the need to simultaneously detect energetic ions, which deposit GeV energy, and subsequent decays, which can deposit less than 1...
The ACTAR TPC [1,2] detector has been designed as a versatile device for reaction and decay studies in nuclear physics. It is a gas detector working as a time projection chamber (TPC), than can be used either in “active target” mode where the gas is used as a target for the nuclear reaction or as an active stopper for implantation-decay experiments. The first experimental campaigns took place...
The recoil-decay correlation technique is a powerful tool to perform spectroscopic studies of exotic nuclei produced with very low cross sections. The characteristic alpha or proton decays (or decay chains) observed at the focal plane of a recoil separator provide a straightforward way to identify the produced nuclei and allows to “tag” the prompt or delayed gamma-rays emitted by the nucleus...
In the past few decades, nuclear physics research has seen tremendous progress as several radioactive-ion beam facilities with unprecedented beam intensities are coming online around the world. These facilities open up the way to access and
study the most exotic nuclei ever produced on earth, bringing us closer to the elusive nuclear systems that play a crucial role in astrophysical sites such...
The HISPEC-DESPEC collaboration has an extended experimental program in the FAIR Phase-0 campaign focused on decay studies. Such studies are based on active implantation detectors surrounded by a gamma array, allowing to determine large sets of experimental quantities: α and/or β decay half-lives, internal de-excitation schemes, lifetimes of nuclear states, full β-strength and Pn measurements,...
In this talk the latest advances in integrated pre-amplifiers for semiconductor detectors will be explored. In particular, an innovative device will be described that allows to perform simultaneously high-energy and low energy, high resolution spectroscopy. This device also minimizes the deadtime in case of saturation and configures itself as the ideal readout solution to detect both heavy ion...
For a successful experiment with slowed down exotic beams at a fragmentation facility, certain common steps have to be followed including identification, separation and an accurate set of their energy to match the range into the detector to be used. At GSI, primary beams are accelerated to relativistic energies to impinge in a production target at the entrance of the Fragment Separator (FRS)...
Decay spectroscopy of the most exotic neutron-deficient nuclei can be effectively performed using a recoil separator coupled with a highly segmented silicon implantation detector positioned at its focal plane to study weakly produced products resulting from fusion-evaporation reactions. Sufficient pixelation enables the correlation of implantation events with their subsequent decay chains....
Decay spectroscopy experiments aim at a detailed study of the decay mechanisms in the most exotic nuclear species at reach at FAIR, with the measurements of decay half-lives, competing decay modes, and isomeric state identification. For the experimental program conducted by the DESPEC collaboration, nuclides isolated by the FRS are stopped in the AIDA active implanter which is based on Si...
Perovskite materials possess a unique crystal structure and show great promise in applications such as solar cells, LEDs, lasers, and photodetectors. Recently, they have gained attention as efficient X-ray detectors, particularly lead halide perovskites (HPs), which are known for their excellent luminescence, high mobility-lifetime product (μτ), and sensitivity to X-rays [1]. Their adjustable...
New developments on detection systems are have been going on since the mid 90's order to build arrays with improved sensitivity by increasing peak to total (P/T) and efficiency. The adopted solution is the use of large volume GeHP detector with position sensitivity based on segmented contacts and Pulse Shape Analysis (PSA). In these new arrays the target can be surrounded by hundreds of...
The study of 𝛽𝛽-decays far from stability is essential to understand the evolution of nuclear structure and nucleosynthesis processes. 𝛽𝛽-decay experiments with such exotic nuclei involve intense cocktail beams from fragmentation facilities. The role of an implantation detector in these experiments is to measure the energy and the positions of both heavy ion implantation and 𝛽𝛽-ray emission to...
The low-energy Coulomb-excitation technique is capable of providing unique information on static electromagnetic moments of short-lived excited nuclear states, including non-yrast states. The process selectively populates low-lying collective states and is ideally suited to study phenomena such as shape coexistence and the development of exotic deformation (triaxial or octupole shapes) in...
Silicon detectors are widely used in various fields of physics, including nuclear physics and astrophysics. Over time, several generations of detectors have succeeded one another, becoming increasingly performant in terms of precision and accuracy of observables, as well as in their number and type. In this contribution, I will discuss different types of detectors, from EUCLIDES to GRIT,...
With the increasing popularity of modern digitizers, it is becoming more common for signal waveform to be recorded in addition to energy and time information in experiments. The waveform was typically used for better signal timing and pulse shape discrimination. In this talk, we will focus on WAS3ABi, an active stopper made of four layers of double-sided silicon strip detectors. In an...
