1. SPES Letters of Intent LOI-1: Heavy-ion binary reactions as a tool for
detailed g-spectroscopy in exotic regions
Spokepersons: Silvia Leoni and Adam Maj
LOI-2: Search for deformed oblate structures in 96Y by
g-spectroscopy and cluster transfer reactions with a 95Sr SPES beam
Spokepersons: Silvia Leoni and Bogdan Fornal
University of Milano and INFN sez. Milano
IFJ PAN-Krakow

2. LOIs Collaboration GALILEO/AGATA PRISMA Scintillators (PARIS/HECTOR+)
Milano University and INFN
A. Bracco, G. Benzoni, N. Blasi, S. Bottoni, F. Camera, F. Crespi, S. Leoni, B. Million, O. Wieland et al.
P.F. Bortignon, G.Colò , E. Vigezzi et al.
Krakow, Poland
A. Maj, B. Fornal, P. Bednarczyk, M. Kmiecik, M. Ciemala, N. Cieplicka, W. Krolas, B. Szpak et al.,
Legnaro INFN Laboratory
L.Corradi, G. DeAngelis, E. Fioretto, F. Gramegna, D. Napoli, A. Stefanini, J.J. Valiente-Dobon, et al.
Padova University and INFN
D. Bazzacco, S. Lenzi, S.Lunardi, G. Montagnoli, D.Montanari, F.Scarlassara, C.Ur, et al.
Torino University and INFN
G. Pollarolo
Ruder Boskovic Institute, Zagreb
S. Szilner, T. Mijatovic et al.
Heavy Ion Laboratory, University of Warsaw
K. Rusek
KU Leuven, Belgium
R. Raabe
Universite Libre de Bruxelles, Belgium
M. Sferrazza
JINR, Dubna, Russia
V. Zagrebaev
GALILEO/AGATA
PRISMA
Scintillators
(PARIS/HECTOR+)

3. LOI-1 Heavy-ion binary reactions as a tool for
detailed g-spectroscopy in exotic regions
Spokepersons: Silvia Leoni and Adam Maj
Based on the Experience with Multi-Nucleon Transfer Reactions
at LNL and GANIL Laboratories with STABLE Beams (109 pps) N Z
46Ca
Spectroscopy of
Moderately N-Rich Nuclei
(HARD-to-REACH…)
66Ni
48Ca
64Ni
48Ca + 6MeV/A

4. KEY-ASPECT: Gamma-Array coupled to Magnetic Spectrometer
CLARA/AGATA–PRISMA (LNL) – EXOGAM-VAMOS (GANIL) K Ca Sc Ti
A [a.m.u.]
REACTION Studies
MASS spectra
48Ca + 64Ni
@ 6 MeV/A
COMPLETE
g-SPECTROSCOPY Studies
Angular Distribution
Polarization
Lifetimes
49Ca
Plunger E1 E2
7/2-
9/2+
7 Wu
0.05 Wu
D. Montanari, S. Leoni et al., PLB697(2011)288
3- p3/2
High-Efficiency g - particle coincidence Measurements

5. FIRST EXAMPLE of Multi-Nucleon transfer with RIB
24Ne MeV/A
EXOGAM + VAMOS
SPIRAL Beam 24Ne ~ pps
Studies of Reaction Dynamics and identification of low-lying states
in ONE nucleon transfer channels
24Ne
25Ne
+1n
23F
-1p
24Ne
2+  0+
Reasonable agreement with semiclassical model GRAZING for +/- 1 nucleon
G.Benzoni, F.Azaiez et al., EPJA45(2010)287

6. Multi-Nucleon transfer with SPES beams
@ 5-10 MeV/A
Physics Cases with pps – (SPES 200mA)
g spectroscopy around 132Sn
r-process nuclei beyond N=50
Similar/Better Quality of Today Experiments (with 109 pps)
FOCUS on States Favoured by HEAVY-ION REACTIONS
Medium-High Spins
Coupling with Collective CORE excitations
COMPLEMENTARITY to
Fission, b-decay, Coulomb excitation, Transfer with light targets (d,p), (d,t), …

7. CASE 1: Testing the rigidity of 132Sn double magicity
STUDY OF NUCLEI
1 and 2 nucleons away
from 132Sn
FOCUS ON
Particle-Phonon couplings
with 2+ (7.2 Wu) and
3- ( > 7 Wu) of 132Sn
(responsible for quenching of
Spectroscopic Factors)
 Ip, B(El)
Z=50
N=82
10 mb
1 mb
GRAZING calculations
Conservative estimates for more than 1 nucleon transfer
SPES Beams
130Sn
131Sn
132Sn
133Sn
134Sn
5 105
129In
130In
131In
132In
133In -
128Cd
129Cd
130Cd

8. 131In – proton hole states 132Sn G.Colò and P.F.Bortignon
pure
hole states
G.Colò and P.F.Bortignon
M.Gorska et al., PLB672(2009)313

9. Predictions from Zagrebaev – Greiner Model
(Courtesy of V. Zagrebaev)
Not Only Spectroscopy but also Study of the Reaction Mechanism

10. CASE 2: r-process nuclei beyond N=50
Only masses
subshell
N=56
Shape changes
with N number
N=50
SPES Beams on 238U target
90Rb
91Rb
92Rb
1 109
93Rb
94Rb
- 1p
- 2p
- 3p
90-92Br
94-96Kr
- 4p
87-90Se
86-88As

11. Importance of Nuclear Deformation difficult to extrapolate
for r-process
b-decay half-lives and neutron emission probabilities
are different in DEFORMED and SPHERICAL nuclei
tb SPH ~ 7 x tb DEF
PnSPH ~ 0.5 x PnDEF
Large uncertainty in
r-process location
difficult to extrapolate
to more exotic regions
P. Moller et al., Phys. Rev. C67, (2003) and ref. therein.

12. Multi-Nucleon Transfer at 5-10 MeV/A
Experimental SETUP
Multi-Nucleon Transfer at 5-10 MeV/A
with most intense SPES beams Sn and 90-92Rb ( pps)
Key Ingredients:
Magnetic Spectrometer for ION Identification
 PRISMA
Efficient g-array for high resolution g-spectroscopy
 GALILEO/AGATA
Efficient g-array for Multiplicity Studies and High Energy g Rays
 PARIS/HECTOR+ (2p configuration)
(See also LOI W. Krolas on Entry Distribution from Deep Inelastic)
PRISMA
SIMILAR/BETTER quality as today experiments (with 109 pps)
 factor  3 higher detection efficiency (CLARA/EXOGAM  AGATA+Scintillators)
 factor longer beam time (1 week  3 weeks)
DAY1 (factor of 100 less beam)  Spectroscopy Studies of 1 and 2 nucleon tranfer