S. Sidorchuk (JINR, Dubna) Dubna Radioacive Ion Beams DRIBsIII: STATUS and PROSPECTS S. Sidorchuk (JINR, Dubna) 9-16 May 2013, Varna, Bulgaria 1

2 Halo nuclei; Nucleon stability borders; New types of radioactivity; Shell structure evolution; Astrophysical applications; Lightest dripline nuclei - “playground” for testing theoretical models. Stability island: Physical and chemical properties of the heaviest elements. Neutron drip-line Proton drip-line

D.I. Mendeleev’s Periodic Table of the Elements (2012)

Structure of exotic nuclei near and beyond the drip-lines BeamEnergy,MeV/uIntensity, ppsPurity, % 6 Не  Не  Li  Li  Be  Be  C  C16C  C  N x O x O x O x Ne x Ne x Cryogenic tritium/deuterium target, transfer reactions: 4,5 H, 5-10 He, Li, Be… Shell structure evolution – 9,10 He; Two-proton radioactivity, rare decays: Optical Time Projection Chamber ; Lightest dripline nuclei - “playground” for testing theoretical models.

6 What next? EXOTIC NUCLEI:  Mass range of secondary beams;  Intensity of secondary beams;  Beam purity;SHE:  Heaviest target: 249 Cf → Z max = 118  Heavier projectiles ( 50 Ti, 54 Cr, 58 Fe, 64 Ni)  Heavier targets ( 251 Cf, 254 Es -???);  Symmetric reactions: 136 Xe+ 136 Xe, 136 Xe+ 150 Nd, 150 Nd+ 150 Nd;  Nucleon transfer reactions ( 136 Xe+ 208 Pb, 238 U+ 248 Cm). Sufficient increasing of overall experiment efficiency is needed!

Project DRIBs-III (2010 – 2016) The purpose of the project is expansion of a set of accelerated ions, both of stable, and radioactive isotopes, essential increase of intensity and quality of beams. Realization of project DRIBs-III provides: (A≤ 100, E ≤ 10 MeV ·A, I ≤ 10 pµA)  creation of the high-intensity universal accelerator of heavy ions (A≤ 100, E ≤ 10 MeV ·A, I ≤ 10 pµA),  creation of a new experimental hall (2600 m 2 ),  completion of modernization of cyclotrons U400 and U400М,  creation of new generation experimental set-ups. Funds: 60,000,000 $.

Full-scale realization off the DRIBs-III U400M DRIBs MT25 U200 IC100 Nuclear physics with stable & RI-beams U400M &SC ECR Nano/Lab 1500m m 2 DC-280 new SHE Factory Production & study of exotic nuclei Applied research U400R upgraded

Schedule of the SHE factory creation

DC280-cyclotron – stand-alone SHE-factory  Synthesis and study of properties of superheavy elements.  Search for new reactions for SHE- synthesis.  Chemistry of new elements. DC280 (expected) E=4÷8 MeV/A IonIon energy [MeV/A] Output intensity 7 Li41× O81× Ar56× Ca50,6-1,2× Cr52× Fe51× Sn52× Xe51× U75×10 10 Manufacturing of DC280 has been started.

SHE Factory construction area

“physical” “chemical” ReactionTransmission 244 Pu( 48 Ca,3n) % 244 Pu( 58 Fe,4n) % New FLNR gas-filled separator 32 nd Meeting, June 2010 New FLNR gas-filled separator PAC for NP 32 nd Meeting, June 2010

Mass-spectrometer MASHA 31 st Meeting, January 2010 Mass-spectrometer MASHA PAC for NP 31 st Meeting, January 2010

Fragment-separator ACCULINNA-2 Manufacturing has been started

Flerov Laboratory of Nuclear Reactions (JINR) THANK YOU FOR YOUR ATTENTION !

High transmission for asymmetric combinations (beams of 12 C, 14 N, 16 O, 22 Ne) Availability for symmetric combinations ( 136 Xe Xe → 272 Hs*) Velocity filter for asymmetric combinations VASSILISSA-GABRIELLA 31 st Meeting, January 2010 VASSILISSA-GABRIELLA PAC for NP 31 st Meeting, January 2010

ACC / ACC-2 FLNR JINR RIPS / BigRIBS RIKEN A1900 MSU FRS / SuperFRS GSI LISE3 GANIL , msr 0.9 / / /  p/p, % ± 2.5 / ± 3.0± 3.0 / 6.0± 5.5± 2.0 / 5.0± 5.0 Rp/  p 1000 / / / B , Tm 3.2 / / / Length, m 21 / 3827 / / 14019(42) E, AMeV 10÷40 / 6÷6050÷90 / ÷160220÷1000/150040÷80 Additional RIB Filter No / RF-kickerRF-kicker / S-formS-form & RF- kicker S-form / Preseparator Wien Filter Characteristics of existing and new in  flight RIB separators (  and  p/p are angular and momentum acceptances, Rp/  p is the first-order momentum resolution when 1 mm object size is assumed)

Joint Institute for Nuclear Research Dubna 18

U400M U400 DRIBs MT25 U200 IC100 FLNR Nanotechnology SHE Exotic Nuclei E = 30 ÷ 50 MeV/n A < 20

Structure of exotic nuclei near and beyond the drip-lines BeamEnergy,MeV/uIntensity, ppsPurity, % 6 Не  Не  Li  Li  Be  Be  C  C16C  C  N x O x O x O x Ne x Ne x Cryogenic tritium/deuterium target, transfer reactions: 4,5 H, 5-10 He, Li, Be… Shell structure evolution – 9,10 He; Two-proton radioactivity, rare decays: Optical Time Projection Chamber ; Lightest dripline nuclei - “playground” for testing theoretical models. 45 Fe CCD