NUSTAR Nuclear Structure, Astrophysics, Reactions
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Transcript of NUSTAR Nuclear Structure, Astrophysics, Reactions
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NUSTARNuclear 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. ЧулковРНЦ «Курчатовский Институт»
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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
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Interplay between
nuclear structure and reaction mechanism
Energy per nucleon, MeV
100010010
Fusion
Elastic scattering Inelastic scattering\
Quasi-free scattering
Compound nucleus
Direct reactions
Transfer reactions Charge exchange
Deep inelastic
Electromagnetic dissociation
Cluster or nucleon knockout
Cro
ss
sect
ion
-2n-0n
-1n
Bf
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More than 15 years of collaboration with Russian institutesExisting 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.
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FAIR - Facility for Antiproton and Ion Research
100 m
UNILACSIS 18
SIS 100/300
HESRSuperFRS
NESR
CRRESR
GSI todayGSI todayFuture facility FAIR
Future facility FAIR
ESR
NUSTAR
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The NUSTAR facility
HiSpec :gamma spec DeSpec :decay spec LASPEC: laser spec MATS: Penning traps
R3B: reactions
Stored beam (rings): EXL : hadron scattering ELISe : electron scattering AIC : antiproton scatteringILIMA – mass measurements
Exotic (radioactive) beams formed by fragmentation, selected by separator.
Super FRS
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H. Geissel et al. NIM B 204 (2003) 71
FR S
S uper-FR S D egrader
D egrader 1
D egrader 2
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%, DFx= ± 40 mrad, DFy= ± 20 mrad
BINP, Novosibirsk
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Superconducting dipole spectrometer. R3B
Existing dipole spectrometer ALADIN
New large-acceptance superconducting spectrometerUnder construction.
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Resolution: Tof ~
250 ps p
~ 5 - 10 MeV/c IVM ~ 0.2 - 1. MeV
Efficiency1
Neutron Energy (MeV)
Nucl. Instr. Meth. A314 (1992) 136
LArge Neutron Detector LANDNeuLAND in FAIR
NeuLAND based on RPC
PNPI – neutron detectors for R3B and EXL projects
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CsI Calorimeter R3B
Existing γ-spectrometer
New calorimeter based on CsI crystals 5000 crystals 12-20 cm
JINR & RRC Kurchatov Institute
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Experiments at the NESR storage ring EXL
Completely new setup.Shells from Si- detectors,surrounded by γ-spectrometerbased on CsI crystals.
Silicon detectors – PTI CsI γ-spectrometer –JINR & RRC Kurchatov Institute
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Electron-Ion scattering in a Storage Ring (eA Collider) ELISe
• 125-500 MeV electrons • 200-740 MeV/u RIBs
• achievable luminosity: 1025-1030 cm-2s-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: > 1024 cm-2 s-1
• Selective electromagnetic excitationplus spectroscopy, fission, ... studies.Full identification of electric & magnetic multipolarities and of the final state
( new collective soft modes) req. luminosity: about 1028 cm-2 s-1
• Quasi-free scattering (single-particle structure)
req. luminosity: about 1029 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.)
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Electron spectrometer. ELISe.
Electron
beam
Ion beam
100 cmVertical drift chambers
BINP – electron spectrometerINR RAS & RRC Kurchatov Institute - detectors
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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