Nordic Winter Meeting on Physics @ FAIR

Welcome and opening remarks by the local organizing committee.

Understanding nuclei is a quantum many-body problem of incredible richness and diversity and studies of nuclei address some of the great challenges that are common throughout modern science. Nuclear structure research strives to build a unified and comprehensive microscopic framework in which bulk nuclear properties, nuclear excitations, and nuclear reactions can all be described. A new...

QRPA calculations give important information about excited state properties of nuclei. The Fidipro nuclear theory group at the Dept. of Physics, University of Jyväskylä, has been developing advanced QRPA solvers based on Energy Density Functionals since 2008. Our goal is to produce fully self-consistent (ground state and QRPA with the same Energy Density Functional (EDF)) QRPA solvers...

Advances in the production and manipulation of radioactive isotopes together with new innovations in optical spectroscopy and ion trap technique have resulted in a great progress in understanding of ground-state properties. The recent achievements pave the way for a study of ground-state properties of the most exotic nuclei, achievable only with the next generation facilities, like FAIR. In...

The objective of the DESPEC Advanced Implantation Detector Array (AIDA) project is to develop, commission and exploit a state of the art silicon detector array for decay spectroscopy experiments using the SuperFRS fragment separator at the FAIR facility. It is anticipated that AIDA will be operated in conjunction with other detection systems, such as gamma-ray and neutron detector arrays,...

The talk will deal with an overview of the most recent developments in few-body physics regarding both nuclear structure and reactions. I will concentrate on ab-initio approaches, shortly describing the methods, some of their recent applications, and the perspectives of the field in view of the upcoming FAIR program.

The neutron dripline as being defined by the heaviest, proton-deficient, bound isotopes, determines the limit of nuclear stability at the neutron-rich side of the nuclear chart. Neutron or proton knockout from light dripline nuclei leads to the formation of unbound nuclear systems with extreme A/Z ratios, followed by their immediate decay. An experiment of this kind has been performed at GSI...

Recent experimental results using the breakup reactions at the new-generation RI-beam facility, RIBF, at RIKEN, will be presented. After briefly introducing the facility and showing some of the other highlights of the experiments at RIBF facility, we focus more on the breakup experiments. We measured the inclusive Coulomb and nuclear breakup of neutron drip line nuclei 22C and 31Ne[1]....

The reaction theory is a key tool to interpret experimental measurements and extract nuclear structure information. Traditional direct scattering formalisms developed to the stability line are inadequate to describe the scattering of stable from halo nuclei. With the delivery of high precision data at the future FAIR facility it is timely to have tight control of the theoretical...

This presentation outlines the current status of the Facility for Antiproton and Ion Research (FAIR). It is expected that the actual construction of the facility will commence in 2010 as the project has raised more than one billion euro in funding. The sequence and scope of the construction will be described. Also the physics program of FAIR, based on the acquired funding, will be presented.

The FAIR project aims at producing very dense secondary beams of rare isotopes and antiprotons. The concept reposes on two pillars: the production of high-intensity high-energy primary beams (all ions from protons up to bare Uranium) and the implementation of dedicated beam cooling techniques to compress the secondary beams. Versatile parallel operation of the accelerator facility with...

Newly developed techniques for laser spectroscopy of very light isotopes and progress in atomic theory calculations of few-electron systems has allowed the determination of nuclear charge radii of helium, lithium and beryllium isotopes during the last years. These techniques had to provide high accuracy but at the same time sufficient efficiency to study very exotic nuclei that are produced...

Collisions between highly charged ions and electrons in merged electron beams have been introduced as a precision tool for determining atomic properties, applying ion storage rings both at lower and at high ion beam energy. Photorecombination in these collisions can be resonant, as the incident electron is captured in a bound quantum state while the target - a few-electron highly charged ion...

The hydrogen atom is one of the most extensively studied atomic systems, and its ground state hyperfine splitting (GS-HFS) at 1.42 GHz has been measured with an extremely high precision of 10^-12. Therefore the antimatter counterpart of hydrogen, the antihydrogen atom, consisting of an antiproton and a positron, is an ideal laboratory for studying the CPT symmetry. The ASACUSA collaboration...

Cold antihydrogen atoms can be used for precision tests of fundamental matter-antimatter symmetries, such as the CPT theorem. Cold antihydrogen was first produced in 2002 by the ATHENA experiment [1] and the ATRAP experiment [2]. In both experiments, as well as the more recent ALPHA experiment, antiatoms are formed by mixing antiprotons and positrons trapped in a nested Penning trap. A lot...

The new facility at GSI (FAIR) will have key features that offer a range of new research opportunities, among others, in atomic physics and related fields. In recent years, SPARC (Stored Particles Atomic Physics Research Collaboration) is grown up to more than 300 physicists from all over the world. The lecture will give a survey of selected atomic physics topics which form a motivation of ...

In-beam tests of the Lund R3B calorimeter prototype have been carried out at The Svedberg Laboratory, Uppsala, Sweden using the 179 MeV proton beam. The detector consists of a cluster of 5x3 CsI(Tl) crystals representing a section of the barrel of the calorimeter. An energy resolution of ~0.5% has been achieved and gain corrected summing has been tested. Results from the test, including...

Halo nuclei are novel nuclear quantum systems which appear at the neutron drip line for light nuclei. They are well described by a core and one or two loosely bound valence neutrons orbiting around the core outside the range of the nuclear interaction. Therefore these structures are characterized by low separation energies and consequently very narrow momentum distributions of the core from...

In order to provide more data on the T=1 halo state of the six-nucleon system, in particular to investigate the importance of triton-triton and triton-3He clustering, we have made an experiment studying the 3He(3He,6Li*)\pi+ reaction at CELSIUS storage ring in Uppsala. The J\pi=0+, T=1 state at 3.56 MeV in 6Li is believed to have a similar structure as its analogue state; the two-neutron...

The inversion of states is known to happen both in 11Be and 12Be. This indicates a breaking of the N = 8 magic number in 12Be. The breaking has been studied in several different theoretical approaches. One of them [1] describes 12Be as a three particle cluster of 10Be and two neutrons, in analogy to 11Be, which can be described by a 10Be core with an orbiting neutron. The cluster model...

One of the current projects at the Department of Physics in the University of Jyväskylä is to explore more general forms of the Skyrme energy-density functional (EDF). The aim is to find new phenomenological terms which are sensitive to experimental data. In this context we have extended the Skyrme functional by including terms which contain higher orders of derivatives allowing for a...

The HISPEC (High-resolution in-flight spectroscopy) and DESPEC (De- cay spectroscopy) projects are part of the core experimental facility at FAIR. They are aimed at nuclear structure and reaction studies, using high- resolution gamma-ray spectroscopy as their main tool. HISPEC/DESPEC will get information on the force acting between the nucleons inside the nucleus, with special emphasis on...

When quarks were first discovered, it was widely considered that the age-old quest for finding the basic constituents of matter was finally over. All matter is comprised of hadrons & point-like leptons, and the hadrons, in turn, are made of quarks: three quarks form a baryon and a quark-antiquark pair forms a meson. However, developments during the intervening forty years indicate that...

The PAX collaboration has recently proposed to use an internal polarized hydrogen storage cell gas target in the Antiproton Decelerator ring (AD) of CERN to determine for the first time the two total spin–dependent pbar-p cross sections σ1 and σ2 at antiproton beam energies in the range from 50 to 450 MeV [1]. The data to be obtained are of interest in itself for the general theory of pbar-p...

After an introduction to QCD and the concept of effective theories I will present some general considerations how to decide if a given hadron has a dominant hadronic substructure ("hadron molecule", dynamically generated state). I will select two examples, one from the sector of charmed mesons and one from the sector of light mesons, to illustrate these ideas.

After an introduction to several astrophysical sites, recent experiments will be discussed contributing to the needs for nuclear reaction rates under the respective conditions. The experiments discussed cover a broad range of stellar sites - from p-process to s-process and experimental techniques - from experiments using radioactive samples to measurements with radioactive ion beams.

Many-particle final state reactions can provide information on the structure of excited nuclear states and their decay mechanism. Progress in detector technology is making it possible to measure such many-particle final states in complete kinematics thereby opening up new possibilities for data analysis. Reaction channels indistinguishable to the incomplete measurement can be separated...

Phenomena that are difficult to describe in standard many-body methods as Hartree-Fock or the shell model are regarded as exotic, like clustering of nucleons which leads to molecule like structures, or halos formed by weakly bound nucleons. These special configurations are found as ground states and excited states whenever one is close to the energy of the corresponding breakup...

Within the framework of self-consistent mean-field models employing effective interactions a wide range of structure phenomena can be described, encompassing bulk properties such as masses and radii as well spectroscopy. In the absence of restrictions, such as spherical symmetry or time-reversal invariance within these models, there are additional contributions to the spin-current tensor and...

Be-like ions are sources of forbidden emission lines which are relevant for the information on astrophysical plasmas. We propose to study the lifetimes of metastable states, and the influence of nuclear spin on it, in Be-like ions along the isoelectronic series, through electron-ion collision processes and through laser excitation. The radiative decay of the 1s^2 2s2p(^3P_0) first...

High Energy Density Physics (HEDP) spans over wide areas of basic and applied physics including astrophysics, planetary sciences, geophysics, inertial fusion and many others. Over the past decade, extensive theoretical work [1-8] that included sophisticated 2D and 3D numerical simulations as well as analytic modeling, has shown that due to volumetric energy deposition in matter, an intense...

A talk reviews the Compressed Baryonic Matter (CBM) experiment goals, informs of the current status of its preparations and, finally, concludes with the plans for the near future of the project.

Ultra-relativistic heavy ion reactions provide a tool to study the collective properties of extreme states of matter, of the Quark Gluon Plasma. Collective flow dynamics is one of the most dominant observations and enables us to draw conclusions on the Equation of State, on the transport properties and of the phase structure and transitions of the matter. The collective elliptic flow scales...

At high energies the strong force is well described using quarks and gluons as degrees of freedom, while at lower energies hadronic degrees of freedom are more adequate. The PANDA energy regime is in the transition region between these two descriptions. Pbarp ->YbarY is a good reaction to test models based on these two alternative viewpoints. The weak decay of the hyperons gives direct access...

The production of the charmed masons in ep collisions at HERA was studied using a life time tag with the ZEUS detector at HERA. New results on D meson production at HERA have been presented. Combinatorial background to the D-meson signals is reduced by using the ZEUS microvertex detector to reconstruct displaced secondary vertices. Production cross sections are compared with the predictions...

Selected topics in strangeness nuclear physics are reviewed. The discussion involves hyperon-nucleus interactions, few-body systems with hyperons, spectroscopy of Lambda hypernuclei, double- and multi-strangeness baryonic systems. We also briefly report on the study of antikaon-nucleus dynamics in the quest for kaonic nuclei.

The often surprising properties of neutron-rich nuclei have prompted exten- sive experimental and theoretical studies aimed at identifying the driving forces behind the dramatic changes encountered in the exotic regime. In-beam nu- clear spectroscopy with fast beams and thick reaction targets – where °-ray spectroscopy is used to tag the final state – provides information on the...

The ring branch at FAIR will consist of three different storage rings that are used to pepare circulating rare ion beams with suitably selectable parameters in few seconds time scale. This, together with the increased secondary beam intensities from FAIRs synchrotron and the Super Fragment Separator, leads to unprecedented conditions for physics experiments in storage rings. Several...