Diapositiva 1

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Nuclear Physics activity in Spain
Francisco Fernandez University of Salamanca
EPS meeting Valencia
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NUCLEAR PHYSICS THE PHYSICS OF THE STRONG
INTERACTION
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General Remarks Theory Groups Experimental
Groups Applied Nuclear Physics
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General Remaks

• Nuclear physics in Spain started at the end of
  70
• in several Universities under very difficult
  conditions

fragmentation
scarce finantial support
no experimental facilities
Nevertheless an important number of theoretical
and experimental groups appears mainly at the
universities
1983 Ley de Reforma Universitiaria
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Theory groups
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NUCLEAR PHYSICS GROUP Universidad Autonoma de
Madrid Prof. Poves, Egido
Main Line of research
 Nuclear structure. Nuclear Mean Fields.
 Simetries restauration in mean field Shell
Model  Deformations Superdeformatión,
Hyperdeformatiónand  Colective excitations.
Colective excitations at finite temperature
 Excitaciones Nucleares a Temperatura Finita..
 High angular momentum physics.  .  Double beta
decay. .
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Hadronic and Nuclear Theory Group University of
Valencia Prof. E.Oset
Main Line of research
 Meson meson and meson baryon interaction in
chiral theories Chiral approach to the nucleon
nucleon interaction Elementary reactions with
production of two pions.   Modification of
resonance properties in nuclei. Interaction of
hadrons with nuclei Nuetrino,photon and electron
interactions with nuclei Exotic atoms pionic,
kaonic, sigma atoms.... hypernuclei.
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INTERMEDIATE ENERGIES NUCLEAR PHYSICS
GROUP University of Granada Prof. Lallena, Prof
Ruiz Arriola
Main Line of research
Electron scattering in nuclei Efective
theories Hypernuclei Baryon structure Pionic
Atoms
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NUCLEAR PHYSICS GROUP University of
Sevilla/Huelva Prof. Lozano, Prof Gomez Camacho
Main Line of research
Scattering Theory Nuclear Structure (microscopic
methods, mean field approaches Ramdom phase
approximation BCS) Scattering of exotic nuclei
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NUCLEAR PHYSICS GROUP University of
Barcelona Prof Barranco, Prof.Polls, Prof Viñas
Main Line of research
Microscopic Nuclerar Structure Density dependent
functional Theories Baryon properties in the
nuclear medium
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NUCLEAR PHYSICS GROUP University of
Salamanca Prof. Fernandez
Main Line of research
Hadron structure and dynamics in quark models and
effective chiral theories Baryon-Baryon
interaction (N-N, N-?, ??, etc) Baryon
structure Meson structure and decays Multiquarks
systems
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Experimental groups
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EXOTIC NUCLEI
Madrid, Sevilla-Huelva, Santiago, Valencia
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Proton emission, neutron emission and fission
define an Island of about 6000 possible nuclei
which might exist somewhere in our Universe
On our planet 265 stable plus 60 radioactive
Proton Drip Line
Fission
About 3000 synthesised in our laboratories
Neutron Drip Line
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IEM research programme (CSIC)

• REX-ISOLDE study of halo systems
• Characterise the unbound nuclei 7He y 10Li
• study the transition from weakly bound
  systems to the continuum.
• (Aarhus-Darmstadt-Göteborg-Madrid-Moscow)
• Signatures of dipole polarizability in the halo
  nuclei 6He and 11Li.
• (Huelva-Madrid-Santiago-Sevilla-Valencia)

• In beam investigations of nuclei around
  doubly-magic 100Sn using stable and radioactive
  ion beams
• (Dresden-Köln-Madrid-Valencia)

2 staff 3 postdocs 3 students
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Multi particle breakup - IEM
Example

• ?-delayed particle emission - ISOLDE
• 9C ? 9B ? p ? ? CERN-IS361 done
• 9Li ? 9Be ? n ? ? (In preparation)
• 12N ? 12C ? ? ? ? CERN-IS404
• 12B ? 12C ? ? ? ? Jyväskylä done

• Reaction studies - CMAM tandem
• 3He 6Li ? 9B ? ? ? p
• d 7Li ? 9Be ? ? ? n
• p 11B ? 12C ? ? ? ?
• 3He 9Be ? 12C ? ? ? ?

? Selection rules ? ? Energy window ? ? Feeding
mechanism ? ? Isospin ?

• Feed states of definite spin parity
• Defined by the Q-value
• Clean the operator is known
• F GT transitions feed states of well defined
  spin

Feeds many different states Limited by the
accelerator energy Not trivial, resonance or
direct reactions. Depends on beam and target
chosen

• 2 DSSSD telescope ultra thin window, design IEM
• 64 8 electronic channels
• Data acquisition system FERA-CAMAC

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Madrid Tandetron 5MV electrostatic accelerator
Universidad Autónoma de Madrid
Terminal voltage VT 0,1 5 MV voltage ripple
?V/V10-4 Ion-sources Duoplasma Sputter ? all
elements available Final energy VT(Q1)
Qcharge state Beam current 1-10 ?A
Accelerator working since september 2002. Nuclear
Physics beamline (CSIC-Madrid) in preparation,
foreseen for summer 2003.
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Sevilla-Huelva research program

• EXPERIMENTS TO MEASURE DIPOLE POLARIZABILITY OF
  HALO NUCLEI 6He AND 11Li
• EXPERIMENTS IN THE CNA 3MV TANDEM ACCELERATOR
• (THEORETICAL SUPPORT TO THE COLLABORATION)

SEVILLA
2 staff

2 staff 1 student
HUELVA
Strong involvement of the theory group
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Dipole polarizability of halo nuclei
Reactions with radioactive nuclei
Huelva-Sevilla-Madrid
LEDA-Louvain Edingburgh Detector Array
DINEX-telescope
... Optical model
- - - large diffuseness parameter
Elastic cross section of 6He on 208Pb divided by
the Rutherford cross section at 19 MeV lab
energy.
6He Louvain-la-Neuve - PH189 11Li
REX-ISOLDE - IS399 One important aspect which
differentiates weakly bound nuclei from normal is
the Coulomb dipole polarizability.The strong
Coulomb field of the target distort the 6He
(11Li) projectile, so that the 4He (9Li) core is
pushed away from the target while the halo
neutrons remain unaffected by the Coulomb field.
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CNA (Centro Nacional de Aceleradores) SEVILLA
Participants University of Sevilla-CSIC(Research
Council)- Junta de Andalucía (Local
administration)
3 MV, 20 ?A, operative since 1998
Ion beam analysis RBS, PIXE, NRA, Channeling,
ERD
Material sciences Archaeometry Enviroment Nuclear
Physics Nuclear Medicine
12 Investigators 5 Tecnicians 2 administ.
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Univ. Santiago research programme
Production and structure of neutron-rich nuclei
Residual nuclei production in spallation
reaction (GSI)
Production and b-decay investigation of heavy
neutron-rich isotopes (GSI)
Nuclear structure studies of medium-mass
neutron-rich isotopes (GANIL)
Nuclear structure at the neutron drip-line
(light neutron-rich isotopes) (GSI)
1 staff 2 postdocs 4 students
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Example
Production and b-decay investigations of heavy
neutron-rich isotopes
Collaboration GSI, Santiago, Orsay, Bordeaux
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Gamma spectroscopy group at IFIC
2 staff 2 postdocs 2 students
Research Beta decay studies with Total Absorption
Techniques (GSI,ISOLDE,Jyvaskyla) Nuclear
structure at extreme values of spin and isospin
(Legnaro, Strasboug) Reactions with radioactive
beams (Ganil)
Ge arrays
NaI, BaF
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Example Beta decay, far from stability, large
energy window
Lucrecia at ISOLDE
TAS at GSI
NaI
Mass sep. Radioactive Beam Operating
NaI
25cm
(Madrid, Strasbourg, Surrey, Valencia)

BaF
18cm
Under developement at IFIC
(Warsaw, GSI, St. Petersburg, Valencia)
180 k
n ? discrimination
(Valencia, Surrey)
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Hadron Reactions at Intermediate Energy
IFIC
Univ. Santiago
2 staff 2 postdocs 1 student
2 staff 2 student
TAPS
HADES
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Collisions at intermediate energies

• Accelerators KVI Groningen, GANIL (50, 200MeV/u)
• TAPS Collaboration (384 BaF)
• Measurements of hard photon and subthreshold pion
  production in heavy ion collisions (i.e. Ar Au
  25 MeV/U, ?º)
• Dynamics of heavy ion reactions

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Collisions at relativistic energies

• Accelerator SIS ( Darmstadt GSI) (1GeV/u)
• Measurement of particle production at
  relativistic energies (TAPS Collaboration)
• Hadron Properties in Nuclear Matter (Hades
  Collaboration measuremt of ?, ?, ? mass in the
  nuclear medium)
• Development of high energy pion beams (Hades
  Collaboration)

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Development of high energy pion beams (Hades
Collaboration)
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P,12C
Be
Primary beam
Prod. target
Hades Target
Hodoscope
Time and position of the pions
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nTOF
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n_TOF Collaboration Spain CIEMAT, CSIC-IFIC, U.
Santiago, U. Sevilla, U.P. Cataluña, U.P. Madrid
? Measurement of high quality neutron reaction
cross sections (n,f), (n,?),(n,xn), ..., of key
interest in Nuclear Technology (ADS,
transmutation), Nuclear Astrophysics and Basic
Nuclear Physics
232Th(n,?)
235U(n,f)
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? Construction of a neutron Time Of Flight
facility at CERN high instantaneous flux (106
n/bunch), low duty cycle (10-8), wide energy
range (1eV-250MeV), (good resolution) long flight
path (185m).
Operative since 2002
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Applied Nuclear Physics
Environmental Radiactivity Radiactivity
Surveillance Program (Revira) Oviedo, Santander,
Barcelona, Zaragoza, Valencia, Granada, Sevilla,
Badajoz, Cáceres, Salamnca Alpha Spectroscopy,
Beta Spectroscopy, Gamma Spectroscopy
Bio-medical physics Granada,, Santander Ion beam
analysis technic Sevilla, Madrid
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END
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