Demandes RIKEN RCNPOsaka RIKEN Hi CARI project 2

Demandes RIKEN + RCNP-Osaka

RIKEN Hi. CARI project 2 Super Clover clusters (IBS) 8 Miniball clusters (for ISOLDE) 4 crystals, 8 segments GRETINA Demonstrator 1 QUAD cluster (RCNP) 3 crystals, 6 segments 1 Triple cluster (LBNL) 3 crystals, 36 segments 4 crystals, 36 segments 80 Zn(p, 2 p)79 Cu Ø ~ 9% efficiency at 1 Me. V Ø Installed at Zero-Degree Spectrometer at early 2020 From D. Suzuki

Hi. CARI Physics programs 21 proposals submitted to NP-PAC 2019 Shell structure of 100 Sn Octupole collectivity Shape coexistence Isospin symmetry Shell evolution near 132 Sn and beyond Shape-phase transition near 100 Zr and beyond Shell structure of 78 Ni New island of inversion Magicity at N = 28, 32, 34 Magicity at N = 14 From D. Suzuki Ø Spring 2020 campaign was postponed -> Autumn 2020 ? -> Spring 2021 ?

Demandes Hi. CARI 2021 EXPERIENCES Ø 79 Cu & 78 Ni (PP: R. Taniuchi, S. Franchoo) (p, 2 p) with Minos LH target (CEA) Ø 81 Zn & 83 Ge (PP: F. Flavigny, M Gorska) 6 p/70 j -> 15 k€ with Be target Ø Sn isotopes beyond N=82 (PP: N. Aoi, R. Lozeva) Ø 132 Sn region (PP: Z. Podoliak) Meetings Ø Users meeting 2 k. E L. Olivier, S. Franchoo et al. , PRL 2017 (+these de L. Olivier) F. Flavigny et al. , PRL 2017 H. N Liu et al. , PRL 2019 S. Chen et al. , PRL 2019 Y. L. Sun et al. , PLB 2020 …… 3 p/10 j -> 5. 1 k€ 3 p/5 j -> 3. 8 k € TOTAL Exp = 23. 9 k€

Nuclear moments of isomeric states @ RIKEN • Long-standing fruitful collaboration with the group of H. Ueno – since 2008 • Double fragmentation: Nature Physics 8, 918 (2012) Y. Ichikawa, …, G. Georgiev, et al. Nature Phys. 15, 321 (2019) F. Boulay, …, G. Georgiev, …, R. Lozeva, et al. PRL 124, 112501(2020) Student: T. J. Gray, ANU New student: K. Stoychev (tbc) • December 2018 - NP 1712 -RIBF 143 R 1: TDPAD study of the 10+ isomer in 130 Sn • Unexpected experimental value obtained with very poor statistics. • Requires a confirmation beyond any doubt. TDPAD setup: • plastic scintillator (t=0) • 4 Ge (LE) + 2 La. Br 3 detectors • magnetic field B=150 m. T • Proposal NP 1912 -RIBF 143 R 2 – accepted by the RIKEN NP PAC in December 2019 PP: G. Georgiev AP request for 2021: - “missions”: 4 p (Ph. D student (TJ Gray + 3 SDF researchers) x 2 = 8 weeks –> 12. 5 k€ - “fournitures”: transport of 4 Ge detectors to RIKEN and back –> 3 k€

Qpole and Magnetic moments @RIKEN M. Si, G. Hafner, R. Lozeva Due COVID-19 RIBF Apr-May/June block 2020 cancelled ***planned experiments expected in 2021 Magnetic/Quadrupole Moments E* in knockout RIBF@RIKEN 2021 R. Lozeva, NEXT Hi. CARI experiments Ex in knockout w MINOS Dec. 2019 AP request for 2021: Ø Qpole moment expt (PP: Y. Ichikawa) + Analysis meeting : 3 p/7 d 4. 3 k. E Ø User week + Hi. CARI WS 2 p/4 j 2. 3 k. E

RIKEN – OEDO Réactions de transfert avec des faisceaux ralentis Ø Complémentaire des faisceaux ISOL Ø Long terme : FAIR Détection : Ti. NA Premières exp. acceptées: 130 Sn(d, p) processus r 56 Ni(d, p) np-process Proposition IJCLab 2020 98 Zr(t, p) Transition de phase AP request for 2021: Ø PAC meeting Ø 2 expts 2 x 3 p/10 j 1 k€ 12 k€

Clustering in n-rich isotopes and multineutrons Using (p, pa) cluster KO reaction SAMURAI 12 Experiment (PP: D. B. ) Ø Cluster structure of neutron-rich Be isotopes Ø First spectrum of the 6 -neutron system 10, 12, 14 Be(p, pa) at 150 Me. V/u Performed in Spring 2018 Ph. D Student: Pengjie Li 10 Be(p, p a) Follow-up experiment on n-rich C isotopes No scheduling in 2021 (48 Ca shortage…) IJCLab: M. Assie, D. Beaumel, S. Franchoo, F. Hammache, I. Stefan Collaboration: IJCLab, RIKEN, Hong Kong U. , TI Tech, LPC Caen, Tohoku U. , RCNP Osaka, CEA Saclay, Kyoto U. , TU Darmstadt, NIPNE Bucharest, Kyushu U.

a-clustering at the surface of medium-mass nuclei Using the cluster knockout (p, pa) reaction in direct kinematics s / Na (nb) 2018 experiment on stable Sn Sn isotopes Mass number A Submitted to Nature Phys. AP request for 2021: Ø Mission exp 2 p/7 j 4 k€

RCNP Experiment Proposal E 504 Linear Polarization Measurement in 137 Sm, 137 Pm: search new Wobbling Bands PP: S. Guo (IMP Lanzhou) and C. M. Petrache (IJCLab Orsay) In-beam gamma spectroscopy via the reaction 36 Ar+105 Pd CAGRA : 16 Clovers: High efficiency ~ 5% 8 Clovers @ 90˚: Perfect sensitivity for Linear pol. measurements Fast digital DAQ system: High triggering rate for 3 -fold coincidence events ~20 k/s IMP Lanzhou Cs. I ball: To select diff. emission Participants IJCLab: A. Astier, C. Petrache, K. Zhengchannels Pluri-annual program on Lanthanides region Related program at i. THemba Labs on the Wobbling mode (in Ce and Ba) AP request for 2021: Ø Fourniture/Equip. Ø Mission exp 3 p/7 j Ø informatique 1 k€ 6 k€ 1 k €

Theory: study of 7 H J. Carbonell (IJCLab), in collaboration with E. Hiyama (Tohoku), R. Lazauskas We are interested in 7 H …because we were already interested in 2 n nn 3 n nnn 4 n nnnn 4 H pnnn 5 H pnnnn 7 H pnnnnnn All these systems are resonant state It could be that there is a « tendency » to some form of stability when increasing N nnn -> nnnnnn …. maybe valid only for a moderate number of n’s E. Hiyama, R. Lazauskas, J. Carbonell and M. Kamimura Demande AP 2021 Phys. Rev. C 93 (2016) 044004 J. Carbonell, R. Lazauskas, E. Hiyama and M. Kamimura Mission 4 semaines a Tohoku: 3. 8 k€ Few Body Syst. 58 (2017) no. 2, 67 R. Lazauskas, E. Hiyama, J. Carbonell Prog. Theor. Exp. Phys. 2017, 7, 073 D 03 Description of $^5$H resonant states R. Lazauskas, J. Carbonell, E. Hiyama State of the Art in Nuclear Cluster Physics conference in Texas May 2018. Ab initio calculations of $^5$H resonant states R. Lazauskas, E. Hiyama, J. Carbonell, Phys. Lett. B 791 (2019) 335

Programme Installation Phys. IJCLab Hi. CARI RIKEN 9 25. 9 Nuclear Moments RIKEN 6 22. 1 OEDO RIKEN 5 13. 0 Theory RIKEN 1 3. 8 Clustering via (p, pa) RCNP 2 4. 0 Mode Wobbling RCNP 3 8. 0 contribution IRP France-Japon (env. 20%? ) Demande (k€)

Shape evolution in Zr isotopes 60 Ø Drastic changes at N=60 ! E(2+), B(E 2), … Such abrupt change can be identified to a Quantum Phase Transition Strong occupation of the pg 9/2 - Þ Lower neutron ng 7/2 and nh 11/2 Type II shell evolution T. Togashi et al. , PRL 117 (2017)