Upload
phyllis-mason
View
213
Download
0
Embed Size (px)
Citation preview
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»
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
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
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.
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
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
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
Superconducting dipole spectrometer. R3B
Existing dipole spectrometer ALADIN
New large-acceptance superconducting spectrometerUnder construction.
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
CsI Calorimeter R3B
Existing γ-spectrometer
New calorimeter based on CsI crystals 5000 crystals 12-20 cm
JINR & RRC Kurchatov Institute
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
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.)
Electron spectrometer. ELISe.
Electron
beam
Ion beam
100 cmVertical drift chambers
BINP – electron spectrometerINR RAS & RRC Kurchatov Institute - detectors
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