1. AGATA Campaign at GANIL Scientific Goals
Silvia M. Lenzi
Università di Padova and INFN

2. The AGATA campaigns 2014  GANIL/SPIRAL2 15TC 2010  2012 LNL : 5TC
2012  GSI/FRS 5TC+3 DC
AGATA D.+PRISMA
FRS
Total eff. (compact). ~6%
Total eff. (b=0.5) ~ 10%
AGATA + VAMOS + (EXOGAM2)
AGATA effnominal ~ 8% to
14% in close configuration

3. AGATA at GANIL
The GANIL facility will host the European AGATA germanium array from 2014 to 2016.
The array will be installed in the G1 cave in front of the VAMOS spectrometer.
It will benefit from both the high intense stable beams (from C to U) delivered by the CSS1/CSS2 cyclotrons and the radioactive-ion beams post-accelerated by the CIME cyclotron and produced by the ISOL SPIRAL1 facility

4. Some open questions How does the nuclear force depend on isospin?
How do regular patterns and collective behaviour emerge in complex nuclei?
Which are the properties of exotic nuclei at the limits of binding?
How do the underlying symmetries manifest in collective motion or single-particle behaviour and how these modes compete?
What’s new? collective modes, shapes, decay modes?

5. New phenomena far from stability0+

6. Unique physics opportunities with AGATA@GANIL setup
High intensity stable beams.
Possibility to perform reactions in inverse kinematics.
Exotic beams from SPIRAL1 (from 2016).
AGATA:
High efficiency and position resolution (Doppler correction)
VAMOS:
Large acceptance due to the new focal plane detectors.
Improved DAQ readout, higher counting rate capabilities.
High transmission.
Different modes of operation.
Many complementary devices available or under development

7. AGATA at GANIL : Complementary devices
At 0° as separator (vacuum/gas-filled)
Angles >10 deg for fission & MNT
In G1 coupled to VAMOS (+ EXOGAM2): SIBs, RIBs
Neutron detector (N-wall)
Charged particle array for prompt tagging: DIAMANT
Charged particle array for Recoil Decay Tagging: MUSETT
Charged particle array for transfer reaction MUST2/TIARA : program with SIB and RIB
High-energy gamma detectors: Chateau de Cristal, LaBr3
Future detectors: NEDA , GASPARD, PARIS (LaBr3)

8. Physics Cases
Gamma-ray spectroscopy of neutron-rich nuclei populated in deep inelastic collisions, MNT or induced fission using VAMOS to identify the reaction products.
Spectroscopy of proton-rich nuclei at the N=Z line using the N-wall/NEDA
Spectroscopy of heavy elements towards SHE and N~Z nuclei populated by fusion–evaporation with VAMOS in gas-filled mode.
Spectroscopy using existing and new SPIRAL1 radioactive beams
By the beginning of the campaign AGATA will consist of at least 35 encapsulated crystals (5 double clusters and 8 triple clusters).
By the end of 2015, AGATA is expected to be composed of
45 encapsulated crystals (15 triple clusters: 1π solid angle).

9. AGATA at GANIL WORKSHOP 18-20 February 2013

10. Dedicated to the physics campaign of AGATA in GANIL following the call for Letters of Intent launched on October 2012
Create the basis for defining the priorities for a detailed
scientific program of the campaign
Assess the technical feasibility, constrain the infrastructure
and ancillary detectors integration.
Identify common setups to be run in a row, common physics cases and encouraging collaborations

11. The research with AGATA at GANIL
A total of 47 Letters of Intent were submitted
Neutron rich
Neutron
deficient
Other
SHE
The equivalent of ~2000 UT are proposed
~ hours of beam on target (667 days)

12. the proposals Spokespersons Authors Croatia Belgium Sweden Spain
France
Italy
Germany
Poland
Sweden
Male
Female

13. Physics cases for the AGATA campaign in GANIL
256Rf
254No
Cm,Bk
Cf,Es
48Ca,50Ti SHE
194Pb
176Hg
Sm,Pm
206Hg
102Sn
Dy,Er,Yb
100In
Ru, Pd
58Ni,40Ca N=Z
Xe,Te
80Zr
Zr, Mo
132In
77Y
75Sr
Zr, Sr
78Ni
80Zn
63Ge
68Ni,Fe,Co,Cu
46Ti
38K
238U,208Pb  n-rich
46,48Ca
34Ar
S,Cl,Ar,K
SPIRAL1
Ne,Na

14. neutron-rich nuclei In different mass regions
produced in deep-inelastic, multi-nucleon transfer and
induced fission reactions.
Nuclear spectroscopy near shell or sub-shell closures
Evolution of magic numbers and deformation
Development of collectivity along isobaric and isotonic chains
Shape and K isomers: prompt-delayed coincidences
Shape coexistence
Effective single-particle energies
Reaction mechanisms

15. proton-rich nuclei In different mass regions
produced mainly in fusion-evaporation reactions.
Nuclear spectroscopy near shell or sub-shell closures
Evolution of magic numbers and deformation
Enhanced proton-neutron correlations
Delayed alignment in deformed N=Z nuclei
High-spin states
Isospin symmetry
Isospin mixing
Coupling to the continuum
Shape coexistence
Octupole correlations
Search for exotic shapes
Proton-neutron matrix elements

16. heavy nuclei and towards SHE
produced in deep-inelastic and fusion-evaporation reactions.
Low and high-spin structure
Look for rotational bands in transfermium nuclei
Lifetime measurements
Challenging studies of reaction mechanisms
Location of shell gaps at superdeformation
nuclear astrophysics
Isotopic abundances in novae models
Thermonuclear reaction rates
Spectroscopy of sd-shell nuclei with stable and radioactive beams

17. Instrumentation

18. VAMOS in dispersive mode
Improved Focal Plane detection tripled acceptance
Improved DAQ readout Increased counting rate capabilities

19. Other VAMOS configurations
beam
non-dispersive mode
Prompt and delayed γ-ray spectroscopy
Isomers
Detecting both fission fragments
beam
target
Fission fragments
(IC+MWAC+Si wall)
shell evolution
high-spin states of neutron-rich
species
reaction mechanism
32% of the LoI require VAMOS in vacuum

20. Lifetime measurements
sub-shell closures
single-particle behaviour
shape evolution
shape coexistence
evolution of collectivity
valence-proton and
valence-neutron symmetry
J. Ljungvall
Magnetic moments can also be obtained with the
Recoil in Vacuum (RIV) method for short-living states
22% of the LoI

21. VAMOS gas-filled mode 21% of the LoI require this mode of VAMOS
C. Schmitt et al, NIM A 621 (2010) 558
Used in fusion-evaporation reaction with recoil decay tagging
of heavy nuclei using MUSETT in the focal plane

22. Neutron Wall/NEDA + DIAMANT
NEDA +Nwall
at GANIL
26% of the LoI
M. Palacz

23. AGATA + PARIS dem. + DIAMANT
Search for SD structures in medium-light nuclei
Fusion-evaporation reactions with high intensity stable beams
measurement of discrete (E2) and continuum (statistical) (E1) gamma-rays
DIAMANT
PARIS
AGATA
A. Maj, P. Bednarczyk et al.

24. Outcomes from the Workshop
44 of the 47 LoI submitted were presented and discussed
Feasibility has been checked and technical solutions suggested
Proponents have been encourage to discuss with the experts
of the ancillaries
LoIs with large overlap are warmly encourage to converge into a common proposal
Working groups for the different setups have been formed to
face together the developments needed

25. Working groups Neutron Wall and/or Diamant
Coordinator: Gilles de France
VAMOS in gas filled mode
Coordinator: Christoph Theisen/Christelle Schmitt
Plunger
Coordinator: Joa Ljungvall
DSSD detectors
Coordinator: Peter Reiter

26. Complementary equipment
VAMOS (M. Rejmund)
EXOGAM2 (G. de France)
MUST2 and Tiara (O. Sorlin)
PARIS (A. Maj)
OUPS Plunger (J. Ljungvall)
Cologne Plunger (Ch. Fransen)

27. The campaign
We need to organize subcampaigns by setups and investigate the technical issues case by case.
AGATA will increase in efficiency during the campaign
Not all experiments will benefit from the 1p configuration
We have identified three main subcampaigns:
1st (2015): AGATA+VAMOS (+EXOGAM2, +plunger) : MNT and fission fragments
2nd (end ): VAMOS gas-filled and NWALL : Depending of the availability of these setups
3rd (2016- ? ) : SPIRAL1 : DSSD-Coulex, VAMOS (MNT)

28. First campaign AGATA + VAMOS std. (+ EXOGAM2 )(+ Plunger)
Nuclear structure in neutron-rich nuclei populated
by induced fission or multinucleon transfer
The scattering chamber will be prepared in order to allow the hosting of a plunger device.
The target loader is designed in order to accommodate fragile targets susceptible to oxidation.

29. Future steps Proposals using these setups will be submitted to the
next PAC meeting (foreseen in spring 2014).
Next February, before the PAC meeting, we will organize a
collaboration meeting to discuss together the proposals
based on the LoI of this call, eventual new proposals,
check the feasibility and eventual overlaps.
All proposals have to be discussed at this meeting before
being submitted to the PAC. .

30. Conclusions
AGATA Campaign at GANIL offers many opportunities for frontier physics research in different mass regions and regimes.
The response to the call of proposals has been extremely positive.
In the Workshop of last February the priorities, setups, working groups
have been established.
The campaign will be organized in subcampaigns to be adjusted with upgraded planning:
1st (2015): VAMOS in vacuum (Spectro+plunger)
2nd ( ): VAMOS gas-filled mode and/or N-wall
3rd (2016- ? ) : SPIRAL1 : DSSD-Coulex, MNT
The possibility of using VAMOS in gas-filled mode is highly desirable
The prolongation of the AGATA campaign in 2017
could allow to complete the scientific programme.

31. AGATA Configurations at GANIL
EXOGAM, LaBr3, BaF2 …
E. Farnea et al, Nuclear Instruments and Methods in Physics Research A 621 (2010) 331–343
E.Clément GANIL Scientific Council February 2013

32. Performance of the AGATA array
J. Ljungvall (CSNSM)
M. Labiche (STFC)
for the AGATA collaboration - Preliminary
AGATA nominal 233 mm
EXOGAM nominal 145 mm

33. Performance of the AGATA array
b =12%
× ~ 4.7
× ~ 12