1. Introduction TO PHYSICS WITH SPES
samedi 8 décembre 2018
Yorick Blumenfeld
Institut de Physique Nucléaire - Orsay
SPES Beams
Reaction Mechanisms
Magic Numbers and Transfer reactions
Increasing the reach: Cluster and Multinucleon transfer
Collective excitations and fusion
Some concluding remarks
Unité mixte de recherche CNRS-IN2P3
Université Paris-Sud Orsay cedex
Tél. :
Fax :

2. The SPES Project @ LNL ISOL BEAM FACILITY
08/12/2018
The SPES LNL
a multi-user project
ISOL BEAM FACILITY
8kW Direct Target: UCx 1013 fission s-1
Primary Beam: 200 mA, 70 MeV protons from a 2 exit ports Cyclotron
Re-accelerator: ALPI Superconductive Linac E>10 AMeV for A=130
Applied Physics with proton and neutron beams
70 MeV 450 mA
Approved for construction by INFN
First beams in 2016 or 2017
High intensity proton linac:
TRIPS source - TRASCO RFQ 30 mA, 5MeV
Neutron facility for Medical, Astrophysics and Material science.
Neutron source up to 1014 n s-1
Thermal neutrons: 109 n s-1 cm-2 2 2

3. From Fabiana Gramegna

4. RIB Physics Reach
Possible but
not planned
Peter Butler 4

5. Reaction domains SPES ISOL Rel. COULEX Knock out In Flight
E/A (MeV/u)
Inel.
scattering
100 10 1
103
106
Rel. COULEX
Knock out
Safe COULEX
1 nucl. Stripping
(p,d)
1 nucl.
Pickup
(d,p)
2 nucl. transfer
In Flight
ISOL
Deep Inel
Fusion
SPES
Minimum
Intensity (pps)

6. Changes in Magic Numbers far from Stability
Weakening of the spin-orbit interaction
Influence of the tensor monopole force
Inclusion of three body forces
Observed around N=20 and 28; SPES will cover N=40 and 82 and move towards N=50.
Influence on the r-process

7. Around 78Ni and 132Sn Sophisticated MC Shell Model Calculations are Now AvailableEX
B(E2) N

8. EXPERIMENTAL RESULTS 34Si(d,p)35Si
f7/2
106°<q<115°
f7/2
f5/2
p3/2
p3/2
p1/2
f5/2
p1/2
910
1130
35Si
2040
3/2-
1/2-
7/2-
E*<1.4MeV
Here is presented the excitation energy spectrum of 35Si derived from the detection of the protons in a given range of angles between ° in the lab. As the target was thick, the energy resolution is not very good, but We see about 4 peaks, whose width is increasing as a function of the excitation energy, which is expected by simulations.The shaded part in black likely corresponds to the deuteron break-up component.
By gating on each individual peak in different slits of angles, we can derive their angular distribution, and hereby determine the L value of the states that were populated in the transfer reaction. Crosses show experimental data, and fits are results of DWBA calculations using L =1 (blue) or L=3 (red). It is found that the g.s. has L=3, the two next L=1 and the broad one has L=3. These two correponds to the f states of the f7-f5 SO splitting, while the others corresponds to the p3-p1 SO splitting.
Identification of the major part of the
p3/2 and p1/2 strengths in 35Si
G. Burgunder et al
Phys. Rev. Lett. 112, (2014) .

9. Z=20 Z=16 Z=14 MAJOR STRENGTH IN N=21 ISOTONES 41Ca 37S 35Si SF 0.50
0.25
0.75
p1/2
f7/2
37S
2 MeV
p3/2 1
41Ca 3 2 4 5 6
1.9 MeV
0.65
GAP
N=28
DSO(p)
MAJOR STRENGTH IN N=21 ISOTONES
Uozumi et al.
PRC 50 (1994)
G. Eckle et al.
NPA 491 (1989)
E*(MeV)
35Si
1.1MeV
0.91
G. Burgunder et al.
d3/2
Z=20
Z=16
f5/2
Z=14
f5/2

10. 132Sn is doubly magic !

11. Minimum 104 pps Experimental setup: 11 MeV/A Target CD2
(0.6 and 1.3 mg/cm2 )‏
Experimental setup:
4 Clovers ExoGam
Tiara Hyball
To Vamos
11 MeV/A
Beam Tracker(BTD)
10 cm
MUST2
Tiara Barrel
Minimum 104 pps

12. AGATA+CHYMENE+GASPARD/TRACE + PRISMA

13. Other Methods Developed by John Schiffer
ACtive TARget : ERC starting grant Geoff Grinyer

14. Physics Reach
In a first stage (5 mA p beam) (d,p) reaction to 70Ni and 135Sn
In the final stage (200 mA p beam) (d,p) reaction to 72Ni and 137Sn.
For 2N transfer an order of magnitude more beam is necessary. (p,t) or (t,p) reactions will will probe the pairing interaction. A triton target would be nice.

15. Polarized proton target for RIB experiments (Tomohiro Uesaka)

16. Cluster transfer
S. Bottoni et al.;
Act. Phys. Pol. B45 (2014) 343

17. Multinucleon transfer
Has been calculated 2 decades ago and used with stable beams in particular at Legnaro. SPES will provide the opportunity to do spectroscopy with MNTR with radioactive beams. PRISMA +AGATA and/or PARIS is an ideal set up.
The influence of neutron skins on fusion cross sections will also be of interest.
C. H. Dasso, G. Pollarolo, and A. Winther, Phys. Rev. Lett. 73, 1907 (1994)

18. Collective modes
Pygmy resonances through inelastic scattering at 10 MeV/A
Dynamic dipole emission in fusion reactions with very large dipole moments in the entrance channel (large N-Z)
Quenching of the GDR in hot nuclei: Isospin dependance of the liquid gas phase transition.
Tlim
D. Santonocito, SPES workshop A

19. Constraints on the Symmetry Energy through RPA calculations
A. Carbone et al. PRC (2010)

20. ISOL Roadmap in EUROPE
TODAY
SPIRAL –
LNS - EXCYT
FROM 2025

21. LOIs at ISOL Facilities
SPES
SPIRAL2 Phase 2
HIE-ISOLDE
Decay Studies 4 20
Not Applicable
Elastic /Inelastic 2 3
COULEX 7 13
Transfer
8 (3HI) 16
Deep Inelastic/
MNTR 5 1
Fusion/Fission 11
New instrumentation NA
Astrophysics 6