NUSTAR plans at FAIR

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NUSTAR plans at FAIR

• Reiner Krücken
• for the NUSTAR collaboration
• Physik Department E12
• Technische Universität München
• Maier-Leibnitz-Laboratorium
• für Kern- und Teilchenphysik

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Long Standing Questions of Nuclear Structure
Physics

• What are the limits for existence of nuclei?
• Where are the proton and neutron drip lines
  situated?
• Where does Mendeleyevs table end?
• How does the nuclear force depend on varying
  proton-to-neutron ratios?
• What is the isospin dependence of the spin-orbit
  force?
• How does shell structure change far away from
  stability?
• How to explain collective phenomena from
  individual motion?
• What are the relevant degrees of freedom and
  symmetries of the many-body system?
• How are complex nuclei built from their basic
  constituents?
• What is the effective nucleon-nucleon
  interaction?
• How does it connect to QCD?
• What are the nuclei relevant for astrophysical
  processes and what are their properties?

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Nuclear Structure at the extremes
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Lack of predictive power of mean-field models
from RIA Whitepaper
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FAIR Facility for Antiproton and Ion Research
Primary Beams

• 1012/s 1.5-2 GeV/u 238U28
• Factor 100-1000 over present in intensity
• 2(4)x1013/s 30 GeV protons
• 1010/s 238U73 up to 35 GeV/u
• up to 90 GeV protons

SIS 100/300
SIS
UNILAC
FRS
Secondary Beams
ESR

• Broad range of radioactive beams up to 1.5 - 2
  GeV/u up to factor 10 000 in
• intensity over present
• Antiprotons 3 - 30 GeV

HESR
Super FRS
Storage and Cooler Rings
CR
NESR
FLAIR
RESR

• Radioactive beams
• e- - A and Antiproton-A collider
• 1011 stored and cooled 0.8 - 14.5 GeV
  antiprotons

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NUSTAR facility(NUclear-STructure,
-Astrophysics, and -Reactions)
NUSTAR collaboration (ca. 450 scientists)
chair / deputy W.B. Gelletly / R. Krücken
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SUPERconducting FRagment Separator
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Super-FRS Low Energy Branch
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Low Energy Branch
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The AGATA project (Advanced GAmma-ray Tracking
Array)
4p-array based on 180 36-fold segmented Ge
detectors
AGATA will give major improvements compared to
current Ge detector arrays in detection
efficiency, angular resolution and rate
capabilities
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Decay spectroscopy (DESPEC)
Spokesperson B. Rubio

• Decay properties of nuclei along the r-process
• b-decay half-lives, b-delayed neutron emission
• Test of the stability of shell closures and
  search for shell-quenching
• Decay-spectroscopy of isomeric states
• Measurement of nuclear moments and lifetimes
  using gamma-ray spectroscopy following b-decay or
  isomeric decays

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High Energy Branch
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High Energy BranchReactions with Relativistic
Radioactive Beams (R3B)
Spokesperson T. Aumann

• total absorption cross section
• knock-out reactions
• quasi-free scattering
• electromagnetic excitations
• charge-exchange reactions
• fission and spalation
• projectile fragmentation

Magnet partly financed through EU
construction proposal
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Ring Branch
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Mass measurements in the storage ring (ILIMA)
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Schottky Frequency Spectrum
Yu.A. Litvinov et al.
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Reach of ILIMA mass measurements
Spokesperson Y. Novikov
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Exotic nuclei studied in light-ion reactions at
the NESR storage ring (EXL)
Spokesperson M. Chartier
Reactions at low momentum transfer

• Elastic Proton-Scattering
• Quasi-free scattering
• Transfer Reactions
• Charge-exchange reactions
• etc.

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Electron-Ion scattering in a Storage Ring (eA
collider) (ELISe)
Spokesperson H. Simon
132Sn(e,e)
0.15 fm
5

• charge densities from elastic electron
  scattering
• collective modes via inelastic electron
  scattering
• single-particle structure from (e,eN) reactions

Simulation for 1 week
point-like probe clean interaction ? precision
studies in exotic nuclei
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Antiproton Ion Collider (AIC )
Spokesperson R. Krücken Project Manager P.
Kienle

• annihilation of single nucleon in quasi-free
  process
• detection of A-1 products via Schottky Method or
  particle detectors
• measure
• total absorption cross-section
• absorption on neutrons and protons separately

P. Kienle, Nucl. Instr. Meth. B 214 (2004) 193
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Radii and cross sections
Determine proton and neutron radii independently
in the same experiment
AIC goal Drnp on the order of lt10
H. Lenske, P. Kienle, nucl-th/0502065
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Summary and Outlook

• The FAIR facility is the central future project
  for the European Nuclear and Hadron Physics
  Communities
• 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 the many-body
  system atomic nucleus
• the Nature of the effective nucleon-nucleon
  interaction
• relevant components, isospin dependence,
  correlations
• 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 to the future activities at
  FAIR

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11 NUSTAR Technical Proposals
gt450 people
NUclear-STructure, -Astrophysics, and -Reactions
Collaboration (includes ongoing GSI program at
FRS, ESR, SHIP, and a strong theory
community) 1.) Low Energy Branch (LEB) coord.
C.Scheidenberger GSI High-resolution In-Flight
Spectroscopy (HISPEC) Zs. Podolyak
Surrey Decay Spectroscopy with Implanted Ion
Beams (DESPEC) B. Rubio
Valencia Precision Measurements of very
short-lived Nuclei using an Advanced Trapping
System for highly-charged Ions (MATS) K.Blaum
Uni. Mainz LASER Spectroscopy for the Study
of Nuclear Properties (LASPEC) P.
Campbell Manchester Neutron Capture Measurements
(NCAP) M.Heil FZ Karlsruhe Antiproton
ic Radioactive Nuclides (Exopbar) M. Wada
RIKEN 2.) High Energy Branch (R3B) A
Universal Setup for Kinematical Complete
Measurements of Reactions with Relativistic
Radioactive Beams (R3B) T. Aumann
GSI 3.) Ring Branch (STORIB) Study of
Isomeric Beams, Lifetimes and Masses (ILIMA) Y.
Novikov St. Petersburg Exotic Nuclei
Studied in Light-Ion Induced Reactions at the
NESR Storage Ring (EXL) M. Chartier
Liverpool Electron-Ion Scattering in a Storage
Ring (e-A Collider) (ELISe) H. Simon
GSI Antiproton-Ion Collider A Tool for the
Measurement of Neutron and Proton rms radii
of Stable and Radioactive Nuclei (AIC) R.
Krücken TU Munich
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Spokesperson K. Blaum
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Extended wave functions and nuclear radii
from FAIR CDR
See also M.Bender et al., Rev. Mod. Phys. 75
(2003)
NL3
from RIA Whitepaper
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Planned 52Ca knock-out experiment at the FRS
500 MeV/A 86Kr
9Be 2 g/cm2
52Ca
9Be 0.5 g/cm2
Miniball
51Ca
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100Sn Experiment at the FRS
s(100Sn)1.8 pb
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100Sn Experiment at the FRS
DE
124Xe beam E 1 A.GeV
TOF
DE
b-Spectrum
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Single-particle knock-out

• measure
• Identification of residual nucleus
• Momentum of residual nucleus
• gamma-detection for excited states

Adopted from J. Al-Khalili D. Cortina Gil