Photonuclear Data at ELI-NP

Transcription

1 EUROPEAN UNION GOVERNMENT OF ROMANIA Sectoral Operational Programme Increase of Economic Competitiveness Investments for Your Future Structural Instruments Extreme Light Infrastructure Nuclear Physics (ELI-NP) Project co-financed by the European Regional Development Fund Photonuclear Data at ELI-NP Dimiter L. Balabanski Workshop on NSDD evaluation in Europe Jan. 29 th, 2016

2 Extreme Light Infrastructure Mission: Nuclear Physics studies with high-intensity lasers and brilliant γ beams Nuclear Physics

3 ESFRI Nuclear Physics Infrastructures Darmstadt Caen Bucharest

4 ELI-NP Gamma Beam System (GBS) E γ = 2γ 2 e 1+ ( γ θ ) e 1+ cosθ γ 2 + a 2 0 L + Strong forward focusing 4γ ee mc L 2 E L ph/(mm 2 mrad 2 s 0.1%bw) Brilliance LNBL PLEIADES T-REX HIGS MEGA-ray ELI NP year PLEIADES + Dynamitron ++ HIGS T-REX ~ 4γ2 E L Laser Compton backscaeering (LCB) Narrow bandwidth ( 0.3%) gamma-beams up to 19.5 MeV bw Bandwidth year + MEGA-ray ELI NP

5 Photonuclear ReacRons Absorption γ Separation threshold γ ~ 8 MeV γ gs A X β A Y Nuclear Resonance Fluorescence (NRF) Photoactivation Photodesintegration (-activation) Photofission β

6 RA4 management RA4: Experiments with Brilliant Gamma Beams Basic research ELIADE Ge Clover array GANT-GN GANT-N DSBIC THGEM IGISOL g-factors e-tpc Si DSSD 30 3 He counters LaBr 3 and LqSci array THGEM 4π array Bragg IC and DSSD array HTS magnet IGISOL facility: CSC, RFQ, MR-MoF-MS 4π DSSD array TPC with GEM readout ApplicaRons medical radioisotopes NRF applicarons positrons Theory Laboratories γ-spectroscopy/detector laboratory electronic laboratory total of ~60 WP have been defined

7 Nuclear Photonics Nuclear structure Modes of excitation below the GDR Impact on nucleosynthesis Gamow window for photo induced reactions in explosive stellar events Understanding exotic nuclei E1 strength will be shifted to lower energies in neutron rich system NRF γ E1 strength distribution

8 ELIADE array γ-ray spectroscopy delivery of 4 Tigress-type Clovers and electronics is underway Calin A. Ur

9 ELIADE array γγ coincidences angular distriburons polarizaron measurements

10 NRF experiments

11 Nuclear Resonance Fluorescence

12 NRF Physics ELI-NP Self-absorpRon measurements (Γ 0 /Γ i ) Low-energy dipole response (e.g. AcRnides) Dipole response and parity measurements for weakly-bound nuclei InvesRgaRon of the Pigmy Dipole Resonance RotaRonal 2 + states of the scissor mode Parity violaron in nuclear excitaron: 20 Ne Constraints on the 0νββ-decay matrix elements of the scissors mode decay channel: 150 Sm

13 NRF Physics Case (cont d) (1) PYGMY DIPOLE RESONANCE ambi\on: derive proper photon strength funcrons from data goal: determine the neutron-skin thickness experiment: spherical nuclei at or near magic shells invesrgarons into deformed regions day one: 204,208 Pb and 116,124 Sn new data: detailed strength distriburons, knowledge on γ-decay branches, and spin and parity informaron

14 Physics above S n 30 3 He, 15 LaBr 3, 15 CeBr 3, 20 NE213 detectors and electronics One very important aspect of giant resonances rather poorly known is the Studies of GDR and PDR decay Studies of spin-flip M1 resonances (γ, n) cross secron measurements, e.g. p process related measurements: properties of their particle and gamma decays. In fact, gamma decay measurements are extremely difficult as the nucleus has an excitation energy higher than the particle binding energy. Therefore high intensities and efficient detector systems are mandatory. The measurement of the neutron decay requires either an accurate measurement of the neutron kinetic energy or, alternatively, an extremely precise knowledge of the excitation the energy 138 La(γ,n) of the nucleus. 137 La Also reacron, in this case an extremely intense beam with a very the 180m small bandwidth Ta(γ,n) 179 and an efficient detector system are mandatory. Ta reacron. InstrumentaRon: (i) LaBr 3 (Ce) array, (ii) Fast-neutron detector array (iii) NE213 liquid scinrllator array

15 Nuclear Astrophysics tender for 20 DSSD Si detectors is open Molecular states and symmetries in light nuclei The 16 O(γ,α) 12 C reacron The 24 Mg(γ,α) 20 Ne reacron The 22 Ne(γ,α) 18 O reacron The 19 F(γ,p) 18 O reacron The 21 Ne(γ,α) 17 O reacron Day One experiment: InstrumentaRon: (i) Large-area Si DSSD array, (ii) etpc (iii) Bubble-chamber detector The 7 Li cosmological problem ELI-NP will be the ideal cite to study the 7 Li(γ, α) 3 H reacron

16 Photofission tenders for 5 BICs, 8 Si DSSD, THGEM array, electronics and support infrastructure are open or in prepara\on 1. Studies in the 2 nd and 3 rd minimum of the fission barrier: transmission resonances 2. Rare fission modes: ternary fission 3. Structure of neutron-rich nuclei: the rare-earth neutron-rich deformed region

17 Studies of the 2 nd and 3 rd minimum schemarcal descripron of the occurrence of transmission resonances P.G. Thirolf et al., EPJ Web of Conferences 38, (2012)

18 (γ,f) experiment at HIγS, Csige et al., Phys. Rev. C (2013)

19 ALTO, ARIEL, etc. ELI-NP Laser Compton backscacering γ beam spectrum at the IP (without collimator) ~ 1011 γ/s

20 Fragment Yields at the IGISOL-4 facility at JYFL

21 Human Resources Today Attracting the best competencies: public announcements international recruitment head hunting for management positions junior researchers specializing in a unique and top-level field of research PhD students will benefit of a very high specialization with enormous possibilities Head of Research Activities (5) Project integration and execution setup Phase A Phase B Phase C Phase D Phase E Phase F Technical Staff (18) Technical Staff Higher education (18) PhD students (50) Junior researchers (107) Senior researchers (20) 1 hep://

22 Thank you!