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