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 91406 Orsay cedex Tél. : +33 1 69 15 73 40 Fax : +33 1 69 15 64 70 http://ipnweb.in2p3.fr

The SPES Project @ LNL ISOL BEAM FACILITY 08/12/2018 The SPES Project @ 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

From Fabiana Gramegna

RIB Physics Reach Possible but not planned Peter Butler 4

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)

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

Around 78Ni and 132Sn Sophisticated MC Shell Model Calculations are Now Available EX B(E2) 30 40 50 N

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 106-115° 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, 042502 (2014) .

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

132Sn is doubly magic !

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

AGATA+CHYMENE+GASPARD/TRACE + PRISMA

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

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.

Polarized proton target for RIB experiments (Tomohiro Uesaka)

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

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)

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

Constraints on the Symmetry Energy through RPA calculations A. Carbone et al. PRC 041301 (2010)

ISOL Roadmap in EUROPE TODAY SPIRAL – LNS - EXCYT 2016-2025 FROM 2025

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