Over the past years, several sensitivity studies [1 - 4] have been performed in order to identify the uncertainties caused by the nuclear input in reaction networks aiming at describing the production of the $p$-nuclei. All studies indicated a strong dependence of the final abundance distribution of the heavy $p$-isotopes on the $\alpha$-nuclear potential, highlighting the strong need of...
Approximately half of CERN protons are directed onto ISOLDE targets, producing radioactive beams by online mass separation for a wide range of studies in fundamental and applied physics. However, the vast majority of these protons end up being sent to a beam dump. The CERN-MEDICIS project envisages to re-use this fraction of (otherwise) lost protons to irradiate various types of secondary...
Nucleus-nucleus collisions at low and intermediate energies allow one to produce nuclear systems under extreme conditions of excitation energy, density, spin and isospin asymmetry. During the dynamical evolution of these systems nuclear structure manifests itself with correlations between two and more particles that can be studied experimentally by good characterization of the collision event,...
The r-process nucleosynthesis is responsible for the production of about half of the nuclei beyond Fe in the universe. The location for their formation is still debated, but seems to originate from neutron star mergers. From the observation of r abundance peaks connected to shell closure, it is clear that the structure of some key nuclei located there plays an essential role to understand the...
Studies of radioactive ion beams reveal promising possibilities for forefront research programs in various areas fundamental and applied physics. The ISOL@MYRRHA project suggests to incorporate an ISOL (isotope separation on line) installation into an Accelerated Driven System (ADS), called MYRRHA (a Multipurpose hYbrid Research Reactor for High-tech Applications) to be built in SCK-CEN (Mol,...
Starting from the commercialization of LaBr3:Ce scintillators, approximately 10 years ago, a new generation of high performing scintillator detectors began to be available (CeBr3, CLYC, CLLC, CLLBC, Co-Doped LaBr3, ... ). These new scintillators provide good energy resolution, much better than that provided by NaI, an excellent time response, large volumes (and therefore good detection and...
Yorick Blumenfeld
Institut de Physique Nucléaire, 91406 Orsay Cedex, France
This talk will give a brief history of the EURISOL concept through
a summary of the conclusions of the various European contracts devoted to the ultimate ISOL facility. The story started with a feasibility study project in the fifth framework program between 2000 and 2004. It was followed by the most...
Light nuclei are a great playground for Nuclear Physics Studies. It is a very attractive field of research as one can reach at the different Facilities all the bound isotopes for each chemical element and even peer in the unbound systems. In addition, the Q-beta value for many of these nuclei reach values near 20 MeV opening a large window for beta-decay studies. Due to their different...
1 India Institute of Technology, Roorkee, India
2 CeFEMA/Instituto Superior Técnico, Lisboa, Portugal
3 INFN and Dep Fisica, University of Padova, Italy
4 Technical University of Munich, Germany
Explaining the properties of exotic nuclei is a challenging task, but one can obtain information about the nuclear structure and the residual interaction, at the limits of stability. We undertake...
Neutron detectors are used extensively at almost every nuclear research facility across Europe and play a key role in the investigation of nuclear phenomena: in nuclear structure, for decay studies and as ancillary detectors for powerful in-beam spectroscopy arrays; in nuclear reactions, for the identification of the reaction channels and reconstruction of the complete kinematics; in nuclear...
In the experimental study of direct reactions with radioactive-ion beams, several techniques can be implemented for the detection of the reaction residues, such as highly segmented Silicon detectors, active target, or a solenoid with its associated detection. I will briefly present and discuss the 3 techniques which are currently the subject of ambitious developments in Europe.
The efficient detection and the good identification of the many nuclear species emitted in heavy-ion reactions at Fermi energies are important to disentangle the various reaction mechanisms and to progress in the knowledge of the nuclear equation of state and in the search of in-medium effects on the decay properties.
Due to the rich variety of fragments and their wide emission phase space,...
Author:
Michał Ciemała
M. Ciemała1, A. Maj1, P. Bednarczyk1, M. Kmiecik1, B. Wasilewska1, M. Ziębliński1, S. Brambilla2, F. Camera2, A. Mentana2, I. Matea3, O. Dorvaux4, S. Kihel4, O. Stezowski5, Ch. Schmitt4, I. Mazumdar6 V. Nanal6, C. Gosh6, D. Jenkins7, P. Napiorkowski8
on behalf of the PARIS collaboration
1 Institute of Nuclear Physics PAN, Krakow, Poland
2 INFN Sezione di Milano,...
The neutron deficient nuclei around the N=Z line are the ideal laboratory to investigate some part of the nuclear interaction like pairing, shell closure and the degrees of freedom related to the nuclear deformation. In addition, some of the N=Z nuclei close to the proton drip-line are waiting point of astrophysical processes and their nuclear structure is relevant in the predictive power of...
The region of the nuclear chart corresponding to light nuclei has, over the years, yielded many surprising results, among others the discovery of the halo structure in the neutron dripline nuclei. This region of the nuclear chart is also rich of many other phenomena like the appearance of molecular-like structures where $\alpha$-particle-clusters are bound together by the exchange of neutrons...
There are wide variety of experiments pursuing testing and probing fundamental symmetries requiring accelerator time. In this talk I will give an overview of a selection of these experiments focusing e.g. on Standard Model tests and neutrino physics through nuclear observables like half-life, decay branching ratios and atomic masses.
Isospin symmetry is fundamental in nuclear physics. In the case that the proton and neutron were identical particles with the same charge, then excited states in mirror nuclei would have identical excitation energies. In reality, the pp-, nn- and np-interactions are not identical which leads to small differences in excitation energy of states of order of 10s of keV. These small differences...
__
For the collaboration:
S. Leoni et al., University of Milano and INFN sez.-Milano, Italy
B. Fornal et al., Institute of Nuclear Physics PAN, Krakow, Poland
N. Marginean et al., IFIN HH, Bucharest, Romania
M. Sferrazza, Universitè libre de Bruxelles, Bruxelles, Belgium
T. Otsuka et al., University of Tokyo, Tokyo, Japan
The phenomenon of shape isomerism is related to the...
The ISOL mode of production of radioactive ion beams (RIB) is —for the time being— the only one which can provide the beam optical qualities that allow employing the whole set of the most refined techniques for optical, mass, $\gamma$, particles spectroscopy and spectrometry. At very low beam energies, three main measurement domains, exploiting (i) beam manipulation by electromagnetic traps,...
Electron Cyclotron Resonance Ion Sources (ECRIS) are used as charge breeders (CB) to increase the charge state of Radioactive Ion Beams (RIB). ECRIS CB can easily capture and multiionize large intensities of incoming 1+ RIB; but the operating pressure of the plasma and the plasma interaction with the chamber wall generate ion beam background which can spoil the RIB signal. As a consequence, a...
The advent of highly selective radioactive correlation techniques using electromagnetic separators has extended spectroscopic investigations to heavy nuclei beyond the proton drip line. This has led to improvements in our understanding of a broad range of structural phenomena from proton radioactivity to the emergence of collective behaviour outside the N=Z=82 closed shell. However,...
The cosmic site of the rapid neutron capture process (r-process) is still
unkown, although recent observational evidence supports compact binary
mergers (CBMs) as the main source for r-process nuclei in our universe.
The very neutron-rich dynamical ejecta in CBMs host a hot r-process where
local (n,g)-(g,n) equilibria are established, leading to robust nuclear com-
positions that primarily...
The EURopean Isotope Separation On-Line Radioactive Ion Beam (EURISOL) is the next-generation facility for the production of Radioactive Ion Beams (RIBs) using the ISOL method in the European Union.
To produce the RIBs in the EURISOL facility a proton beam of 1 GeV (4 MW power) impinges on a converter, generating, through spallation reactions, intense neutron fluxes with peak values of the...
GANIL, Caen France
On behalf of the EURISOL Steering Committee
The EURISOL project is together with FAIR, one of the major aims of the Nuclear Physics community in Europe. In order to reach the long-term goal of EURISOL a new European strategy is proposed with an intermediate and ambitious step: EURISOL Distributed Facility (EURISOL-DF), http://www.eurisol.org/eurisol_df/).
The...
The astrophysical rapid neutron capture process, the r process, has produced around half of the elements heavier than iron but yet its astrophysical sites are not well known. Neutron star (NS) mergers (either NS-NS or NS-black hole), which can eject synthesized material either dynamically during the merger or from the accretion disks around the central remnant, are currently considered as the...
