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NUSTAR Nuclear Structure, Astrophysics, Reactions NUSTAR is the biggest collaboration in FAIR The collaboration unites 450 scientists from 98 institutions.

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Presentation on theme: "NUSTAR Nuclear Structure, Astrophysics, Reactions NUSTAR is the biggest collaboration in FAIR The collaboration unites 450 scientists from 98 institutions."— Presentation transcript:

1 NUSTAR Nuclear Structure, Astrophysics, Reactions NUSTAR is the biggest collaboration in FAIR The collaboration unites 450 scientists from 98 institutions of 27 countries. NUSTAR is a continuation of the research program currently running at GSI where Russian institutes are actively participating. НАУЧНО-МЕТОДИЧЕСКИЙ СЕМИНАР, СОВМЕ-ЩЕННЫЙ С ОФИЦИАЛЬНЫМ АКТОМ ОТКРЫТИЯ ИССЛЕДОВАТЕЛЬ- СКОГО ЦЕНТРА FAIR- РОСАТОМ. 18-19 июня 2008 Л.В. Чулков РНЦ «Курчатовский Институт»

2 Some Burning Issues The Neutron Dripline The Proton Dripline The Nuclear Mass Surface Particle Radioactivity Nuclei with Extreme Isospin Nuclei with Extreme Spin Super heavies r - process Path rp - process Path Shell structure. New magic numbers Halos- Continuum Structure Proton-neuron Pairing Unusual Type of Clasterization

3 Interplay between nuclear structure and reaction mechanism Energy per nucleon, MeV 1000 100 10 Fusion Elastic scattering Inelastic scattering\ Quasi-free scattering Compound nucleus Direct reactions Transfer reactions Charge exchange Deep inelastic Electromagnetic dissociation Cluster or nucleon knockout Cross section -2n -0n -1n BfBf

4 More than 15 years of collaboration with Russian institutes Existing facilities for studies with exotic nuclei. γ-spectrometer Crystal Ball Large-area high-efficiency neutron detector LAND Large dipole spectrometer ALADIN Main features of the existing FRS/LAND setup will be preserved in the future R3B setup.

5 FAIR - Facility for Antiproton and Ion Research 100 m UNILAC SIS 18 SIS 100/300 HESR Super FRS NESR CR RESR GSI today Future facility FAIR Future facility FAIR ESR NUSTAR

6 The NUSTAR facility HiSpec :gamma spec DeSpec :decay spec LASPEC: laser spec MATS: Penning traps R 3 B: reactions Stored beam (rings): EXL : hadron scattering ELISe : electron scattering AIC : antiproton scattering ILIMA – mass measurements Exotic (radioactive) beams formed by fragmentation, selected by separator. Super FRS

7 H. Geissel et al. NIM B 204 (2003) 71 Comparison of FRS and Super-FRS Pre- and Main separator  high purity Superconducting - 20 Tm Large acceptance even for fission products: Dp/p = ± 2.5%, DF x = ± 40 mrad, DF y = ± 20 mrad BINP, Novosibirsk

8 Superconducting dipole spectrometer. R3B Existing dipole spectrometer ALADIN New large-acceptance superconducting spectrometer Under construction.

9 Neutron Energy (MeV) Nucl. Instr. Meth. A314 (1992) 136 LArge Neutron Detector LAND NeuLAND in FAIR NeuLAND based on RPC PNPI – neutron detectors for R3B and EXL projects

10 CsI Calorimeter R3B Existing γ-spectrometer New calorimeter based on CsI crystals 5000 crystals 12-20 cm JINR & RRC Kurchatov Institute

11 Experiments at the NESR storage ring EXL Completely new setup. Shells from Si- detectors, surrounded by γ-spectrometer based on CsI crystals. Silicon detectors – PTI CsI γ-spectrometer –JINR & RRC Kurchatov Institute

12 Electron-Ion scattering in a Storage Ring (eA Collider) ELISe 125-500 MeV electrons 200-740 MeV/u RIBs achievable luminosity: 10 25 -10 30 cm -2 s -1 depending on ion species - spectrometer setup at the interaction zone - detection system for RI in the arcs of the NESR (see EXL) Physics goals Charge distribution of exotic nuclei (radius, diffuseness, higher moments...) req. luminosity: > 10 24 cm -2 s -1 Selective electromagnetic excitation plus spectroscopy, fission,... studies. Full identification of electric & magnetic multipolarities and of the final state ( new collective soft modes) req. luminosity: about 10 28 cm -2 s -1 Quasi-free scattering (single-particle structure) req. luminosity: about 10 29 cm -2 s -1 Pointlike particle Pure electromagnetic probe  formfactors F(q)  elastic scattering F(q) transition formfactors  high selectivity to certain multipolarities  inelastic scattering Large recoil velocities  full identification (Z,A) complete kinematics Bare ions (no atomic bg.)

13 Electron spectrometer. ELISe. Electron beam Ion beam 100 cm Vertical drift chambers BINP – electron spectrometer INR RAS & RRC Kurchatov Institute - detectors

14 Summary and Outlook The NUSTAR Facility with the Super-FRS covers a wide range of topics concerning the investigation of exotic nuclei in the areas of: Nuclear Structure, Nuclear Astrophysics, Nuclear Reactions NUSTAR will address fundamental questions concerning: –the Structure und Dynamics of atomic nucleus as many-body system –the Nature of the effective nucleon-nucleon interaction relevant components, isospin dependence, correlations, EQS of nuclear matter –Nuclear Astrophysics and the Origin of the Elements The Super-FRS is part of the first stage of FAIR construction There will be a continuous transition from the current FRS program were Russian scientists already actively participating to the future activities at FAIR opening new exciting perspectives


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