RIBF

RIPSGARIS~100 MeV/nucleonCRIB (CNS)~5 MeV/nucleon350-400 MeV/nucleonOld facilityNew facilityRIKEN RI Beam Factory (RIBF)BigRIPSSRCRILACAVFRRCfRCIRCExperiment facilityAcceleratorSHARAQSAMURAIZeroDegreeSLOWRISCRITRI-ringSHE (eg. Z=113)Intense (80 kW max.) H.I. beams (up to U) of 345AMeV at SRCFast RI beams by projectile fragmentation and U-fission at BigRIPSOperation since 2007To be funded

Progress of Research Opportunities with RI Beams Construction of a dedicated facility for RI beam productionvia the projectile fragmentation0th-generation at LBL 1st-generation at LISE-GANIL1990-

Challenges in Methodology with fast RI beams at RIPStransmission method for nuclear radii information energy-dependence of total reaction cross sections, e.g. 11Bein-beam gamma spectroscopy for particle bound states Magicity loss at N=20 Anomaly of B(E2) in 16C via Coulomb excitation, (p,p), Two-step fragmentation, Recoil-shadow methods, ...invariant mass spectroscopy for particle unbound states Large B(E1) in the halo nuclei 11Be, 19C Radiative capture cross sections in stellar evolutions :7Be(p,g)8Bmissing mass spectroscopy Spectroscopy on the heaviest hydrogen 7Hpolarized rare-isotope beams for electro-magnetic moments Anomaly of quadrupole moments in the B isotopes via beta-NMR techniques~40-70 A MeV and A < 60

New frameworks for the new region of nuclear chartneutron-halo nucleineutron-skin nucleiStable NucleiNeutron-rich NucleiN=6N=16??11Be, 11Li, 19C... ?Observation of Exotic phenomena, Systematics, etc. Isospin-, density-dependences of effective interactions, nucleon-corrections Microscopic system (nuclei) to Macroscopic system (neutron stars)Nuclear Matter: New formsNuclear Structure: Shell evolution

Synthesis up to U r-processunknown neutron-rich nuclei theoretical predictions only

Necessary of experimental investigation for nuclear properties of heavy and neutron-rich nucleiMass, life-time, decay modeChallenge for r-process path and explosion in supernovae5Explosion mechanism of supernovaNo explosion in theoretical worksOuter clast of neutron star

Necessary of experimental study for Equation-of-State for nuclear matterMass number1987A

Serendipity

Systematics

SynergyRIBF

RI21RIRIRIRI78Ni1000!!78NiN=5010,000:1238U86Kr

200512SRC70RI

83008Tm)3.8 TSRC

BigRIPSRIBigRIPSSRC20061150RI2SRCRIRI12

Great expansion of nuclear world by RIBFIntensity > 1 particle/day(EPAX@GSI)

Exploration of the Limit of Existence

GSI-FAIR() 2013-FRIB ()RI12

1,000(2002)FNa40Mg2002200723

E=mc2

M(Z, N)

Z, N

~10-22

10-3

M(Z, N)

M(Z, N-1)+Mn

Z, N-1

Delivery of tagged RI-beamTo RI-beam delivery line & experimental set-upsBased on two-stage separator schemeCocktail beam A, Z, Q mixedTagged beam Identify RI-beam species Z, A/Q by measuring E, B, TOF in an event-by-event mode using beam-line detectors on the 2nd stage. Aim at tagging rate up to 1 x 106 pps.BmeasurementTOF& E Dispersive focusT. Kubo et al.total reaction cross section measurement with 2nd stage 2ndary target placed at F5

TOF ()Br = A/Q * vDE ()= Z2 / v2E E = A v2AQZ

BigRIPS

EA/QZ

Total dose: 3.61012New isotopes of 125, 126Pd238U + Be(7mm) at 345 MeV/u2007 MAY-JUNEOnishi et al., JPSJ in press.Isomer 96RbB: 7.438 Tm, P/P=2%

Identification of new isotopes 125,126PdA/Q resolution(r.m.s): 0.041% at Z=46 Br resolution (r.m.s): 0.02% DT resolution (r.m.s.): 40 psecCf. 124Pd 19 counts, 125Pd(cand.) 1count at GSI, 1997 PLB 415, 111 (97); total dose ~1x1012126 (3counts)T. Onishi et al, JPSJ 77 (08)083201.Total dose 3.6x1012 for 25 hrs I ~0.01 pnA on average125 (22counts)

23 New Isotopes !! Nov. 2008 run

Half a year delayed due to the problem of carry-over oil contamination in the refrigerators for the SRC and BigRIPS cryogenic system

November, 238U beam at 345 MeV/u and ~0.4 pnA (max.) (10 times higher than in last year) 7th-26th ZeroDegree Commissioning: detectors, optics, PID Search for New Isotopes

December, 48Ca beam at 345 MeV/u and >100 pnA 5th-21st Search for Halo Nuclei In-beam gamma spectroscopy for island of inversion and beyond

Four proposed-experiments are combined to form one collaboration Programs are managed Not proposal-by-proposal but RIB-by-RIB based to save RIB tuning time and man-powers to have the best programs according to the beam intensityCommissioning and Experiments in 2008

A/Q~2 beams with Z

Serendipity

Systematics

SynergyRIBF

Nuclear Structure

Nuclear Matter

Nuclear Reaction

Nuclear Astrophysics

International workshop Nuclear Physics with RIBFMarch 13-17th 2006Workshop coordination meeting25th Feb (Sat.) 13:30 17:01Participants:T. Otsuka, M. Matsuo, Y. Enyo, A. Kohama, K. Yabana, N. Aoi , H. Ueno, M. Wada, A. Ozawa, T. Motobayashi, S. Nishimura, A. Yoshimi , T. Suda, H. Sakurai 1.Exploring variations of single-particle motions2.Novel correlations in dilute nuclear matter3.Novel dynamics of nuclear matter 4.New collectivity beyond nuclear self-consistency5.-1 Innovative approach to nuclear reactions -I fusion/fission, heavy ion induced reaction and associated topics5.-2 Innovative approach to nuclear reactions -IIdirect reaction and associated topics

Major questions about theory programs (my personal concerns)study of interaction ?? such as Chiral perturbation theory

microscopic study of nuclear structure in heavy-mass region ??

fission dynamics ??

Interplay of mean field between nuclear structure and reaction??

new version of IBM ??

high spin states in nuclei far from the stability line ??

.....If you need computing power, you can use computers in RIKEN Computer Center.In near future, you will have chance to use Peta-flops supercomputerbeing built by RIKEN computer division. vector+scalar

RIBF Theory ForumTo form a virtual laboratory as a driving force for theoretical worksTo form a theory network based on modelsTo discuss entire strategies and directionsTo propose theorist-driven workshopsTo enhance collaborations between theorists and experimentalists as well as among theorists, to create something new -> 0200681012006101122006126320071304200752452008412

neutron-densityproton-densityN=Znormal densityr0r0deuteron condensationalpha condensationdi-neutronShuckneutron starToward high-density Two-body forces ? Role of three-body forces and isospins?Supernova Explosion?EOS and Temperature dependence ?In dilute-system Exotic condensation ??Phase diagram in proton- and neutron-densitiesat neutron-halo/skin ?at excited states?at excited states?Finite system r-dependence of densities ?Based on Matsuo-EnyoT~10 MeVFe-core collapseInner structure ??Matsuo

r (fm-3)E/A [MeV] T=3/2 1S (r ~ 0.1r0) BEC 3P( r= 2r0???

T=1/2, 3/2De-couplingSHE

RIBF (EoS)

Serendipity

Systematics

SynergyRIBF

RIPSGARIS~100 MeV/nucleonCRIB (CNS)BigRIPS/ZeroDegree~5 MeV/nucleon350-400 MeV/nucleonOld facilityNew facility350 MeV/nucleon up to U1st beam in 2006PhaseI 2007-Accelerators + BigRIPS/ZeroDegreePhase-IIExperimental Installations2007~2012 (plan)RIBF Facility Layout

BigRIPS in-flight production of fast rare-isotope beams Ground state properties and low lying excited states via decay spectroscopy / transmission method: particle stability, T1/2, Qb, sR, Ex.(2+)... Deeply bound pionic states via (d, 3He) at 500 MeV Three-body force via pol. d+p elastic scattering at 700 MeV

ZeroDegree multi-function beam line for inclusive/semi-inclusive measurements production of 3rd RI beamsCollectivity and matter distribution via in-beam gamma / missing mass spectroscopy One step energy regime 200~300 A MeV B(E2), B(M1), (p,p), (p,p), Ex....Phase-I programs at BigRIPS/ZeroDegree 2007~Rare-Isotope Physics Programs Fast RI beam production to search for new isotopes Global survey to search for anomalous regionsSpecific programs with deuteron beams

Experimental set-upsBigRIPS /ZeroDegreeExploration into Isospin Frontier toward the drip-linesReaction study fit for high energy domain 200-300A MeVRIB productionPID sectionBigRIPS Fragment Separator high acceptance for fission fragments pid for RI beams at the second sectionZeroDegree Multi-function BT line pid for ejectiles in inclusive- and semi-exclusive measurement medium resolution (p/dp ~ 2000 4000)

Flag ship regions at neutron-rich side238U beam48Ca beamNeutron drip-line for F-to-Mg isotopes? Particle stability 33F, 36Ne, 39Na, 40Mg p-wave halo ? : 31Ne ...Island of inversion : deformation center at N=22? B(E2) for 30Ne, and Ex(2+) for 36Mg, etc.Possible deformation at N=28? B(E2) and Ex(2+) for 42Si, 38Mg, etc.Oxygen beyond N=16 Ground and excited states for 25, 26ONew isotopes between Z=20 to 60 Maaaany new ones !!R-process path T1/2 at A>80New magicity at 54Ca ?? B(E2), Ex(2+), ...Magicity loss at 78Ni ?? T1/2, B(E2), Ex(2+), ...Role of p-n pairing around 132Sn ?? B(E2), Ex(2+), ...Deformation at A~110 ?? collective states

S-p- MeV l = S?p?zZe2/rl(l+1)h2/2mr2e.g. 1.6MeV for l=1 r=5fme.g. 3MeV for Z=10 r=5fmz=1

Flag ship regions at proton-rich side124Xe beam78Kr beamNew isotopes, Proton-drip line ?Double magicity at 100Sn ?2p decayrp- process

N=ZN=Z=oddZ20 T=1 S=0 Z~50 N=50N=82100SnWigner Energy T(T+1) -> T(T+4)rp-processp-n

r-Z=28N=50->r-78Ni1/12005RIBF400/1(106/1RIBFRI Z, ARI78Ni

Magic number, E(2+) and B(E2)proton number505082821262820132Sn208Pb90Zr68NiE(2+) [keV]neutron number50508282126282820132Sn208Pb90Zr68Ni2820B(E2)-1 [1/W.u.]20012001

Total dose: 3.61012New isotopes of 125, 126Pd238U + Be(7mm) at 345 MeV/u2007 MAY-JUNEOnishi et al., JPSJ in press.Isomer 96RbB: 7.438 Tm, P/P=2%

Higher excited states and higher spin statesfor exotic phenomena of collectivity?neutron skins ? collectivity originated from neutrons in skinpairing ? rotation energy v.s. pairing energycluster super-deformation ? mean field v.s. cluster formationexotic modes ? originated from two asymmetric liquids...not only low lying states but also ...J, Exmedium and heavy mass systempopulation by fragmentation/fission

Exotic collectivity originated from decoupling between core and neutron-skin??Soft Scissors ModeSoft Dipole ModeK. Ikeda, Nucl. Phys. A538 (1992)355D.D.Warner, P.Van Isacker, PLB395 (1997)145Decoupling between skin and core in rotation??wc = wskin?Any other exotic ???skin thickness > range of p-n interaction

SAMURAI - large acceptance Kobayashi et al.SHARAQ - high resolution Shimoura et al.Rare RI Ring massOzawa et al.SCRIT - e-RI collision Wakasugi, Suda et al.SLOWRI- slow beams Wada et al.Phase-II construction 2007-2012To maximize the potentials of intense RI beams available at RIBFRI Spin Lab. at RIPS pol. RI beam Ueno et al. http://rarfaxp.riken.go.jp/RIBF-TAC05/

RIRI+SHARAQRIRICNS1001000...192023

SHARAQ Spectrometer Sakai et al 2009-External investment by CNS, Univ. of TokyoHigh resolution spectrometer for fast RI beams

p/Dp ~ 15,000, Dq

SAMURAI Spectrometer Kobayashi et al 2011-

versatile spectrometer with a large superconducting magnet a large acceptance exclusive measurements neutron measurements 80cm gap, BL~ 7Tm, Bmax=3T PID limited to A~100

Invariant/missing mass spectroscopy giant resonances single particle states via (p,2p) etc EOS in asymmetric nuclear matter : SAMURAI-TPC Particle correlations in a few-body system 3NF Coulomb breakup for radiative capture c.s. (p,g), (n,g)

Phase-II programs (installations 2007-2012) [2]Unique facilitiesSLOWRI Wada et al. 2009- production of high-purity and slow RI beam with an rf-ion guide system Table-top experiments: Mass spectroscopy (10-5) via MR-TOF system co-linear laser spectroscopy, trap...Rare RI ring Ozawa et al. isochronous storage ring designed for c.w. beams precise mass measurement (10-6) via individual injection/extraction by trigger kickers particle by particle at 1026 /cm2/s for 132Sn for 1 week ->105 pps injection Feasibility check at KSR, Kyoto-Univ.RIs trapped by the electron beamScattered electronSCRITebeamrf-ion guideisochronous ring

2059()

RI!1/1 Qa+Ab+B +Q GSIRI1200321

Budget Status and Construction PlanApproved in FY08 Operation for 5months Facility Construction SAMURAI (15M$ for FY08-11 magnet, detectors SHARAQ (high resolution) BT line (2M$ for FY08)

Requested for FY09 Operation budget More than 6 months Construction budget for SCRIT (e-RI) a new injector linac

FY10 and later RI-ring, SLOWRI, IRC-RIPS BTSHARAQSAMURAIZeroDegreeSLOWRISCRITRI-ringIRC->RIPS BT

Great expansion of nuclear world by RIBFIntensity > 1 particle/day(EPAX@GSI)

RIB Fragmentationtoward the n-drip lineisland of stabilityT1/2~d-y132Sn+Stable132Sn+RITPost-Accelerationfor fusion productand Fragmentationat BigRIPSTheoretical Work is necessary for the best combination of projectile and target

Activity (a.u.)nuclear structurenuclear reactionp/d accel.HI accel.FusionAtomic BombRIB accel.?Laser ?HE-HI reactionNo waste?856545250525HaloIn-beam g?05Shellliquid-drop?RRCRIBF1602nd??AMDIBMCollectiveCompound??Year