ISOL@MYRRHA an Application of the MYRRHA Accelerator as long as Nuclear Physics MYRRHA

ISOL@MYRRHA an Application of the MYRRHA Accelerator as long as Nuclear Physics MYRRHA

ISOL@MYRRHA an Application of the MYRRHA Accelerator as long as Nuclear Physics MYRRHA

Hanson, Teri, Fitness Editor has reference to this Academic Journal, PHwiki organized this Journal ISOL@MYRRHA an Application of the MYRRHA Accelerator as long as Nuclear Physics MYRRHA ADS first step demo facility at power (50-100 MW) Flexible irradiation facility Need as long as high per as long as mance core : high power density in limited volume High power proton accelerator as driver Design values I= 4mA E=600 MeV Nuclear Physics Research at the MYRRHA accelerator Idea : Use part of the MYRRHA proton beam as long as nuclear physics applications 600 MeV, 100-200 mA, CW proton beam 2.5-3 mA required as long as MYRRHA spallation target CW beam needed (how to split off 100 to 200 mA: RF kicker or deflecting RF cavity ) Different target materials including uranium e.g. Nb, TiC/C, La, Ta, UC: workhorse targets at present) Ruggedized target-ion source systems that deliver RIB @ ~50 keV: ECR 1+: gaseous elements (noble gases, C, N, O, )) surface ion source (hot cavity): as long as beam of alkaline in addition to earth alkaline elements lasers !! degradation of the target per as long as mance to be taken into account !!

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Nuclear Physics Research at the MYRRHA accelerator Operational approach Long beam times (e.g. 12 weeks) as long as experiments that: need very high statistics involve many time consuming systematic measurements hunt as long as very weak signals have an inherent low-detection efficiency Interplay with MYRRHA maintenance schedule Or extract bunch trains (5%) from main train (taking profit of the beam holes needed as long as sub-criticality monitoring) “Green field” facility at a nuclear site (SCK CEN): optimal lay-out of the facility: pre-separator – RF-cooler – post-separator (high mass resolution: M/DM > 10000) multiple – ion beams simultaneaously : limited mass range as long as same element specific experimental hall requirements (e.g. neutron detection hall) Nuclear Physics Research at the MYRRHA accelerator Laser ion source RF cooler Nuclear Physics Research at the MYRRHA accelerator ISOL@MYRRHA can deliver: pure RIB: selective ionization, chemistry, M/DM > 10.000 intense RIB x100 compared to the present ISOLDE limited number of isotopes at start-up, important to leave options open RIB of good ion optical quality very long beam times optimal experimental conditions/lay-out/support ISOL@MYRRHA is based on proven technology !! ef as long as t to make the beams/ef as long as t as long as the experiments !! long-beam times = long idle times

Nuclear Physics Research at the MYRRHA accelerator Complementary to ISOL in addition to In-Flight facilities: HIE-ISOLDE, CERN (Switzerl in addition to ) SPIRAL2, GANIL (France) TRIUMF (Canada) ORNL (U.S.A.) EURISOL (somewhere in Europe) FAIR, GSI (Germany) RIB factory, RIKEN (Japan) FRIB (U.S.A.) Possible physics experiments: Many examples given in field of fundamental nuclear physics, fundamental interactions, atomic physics, materials science, nuclear medicine Neutron as long as Science (cfr. SPIRAL2) versus ISOL@MYRRHA Ft0+ 0+ – Conserved vector current hypothesis – unitarity of Cabbibo Kobayashi Maskawa quark mixing matrix – right-h in addition to ed currents – scalar currents 2. searches as long as exotic weak currents – scalar currents – tensor currents 3. symmetry tests – parity – time reversal Weak interaction Physics Research Nuclei of interest – nuclei at or close to the N = Z line – nuclei with 0+ 0+ transitions – T = 1/2 mirror nuclei ( N = Z-1 N = Z+1; e.g. 21Na21Ne) – nuclei with fast (small logft) in addition to pure Gamow-Teller transitions Possible subjects Options: – improve quantities indicated by green & blue arrows – if CVC accepted Ft-measurements test dc – dNS from theoretical models – go as long as factor ~10 higher precision in Ft than available now as long as the 4 isotopes indicated Error budget, required precision, in addition to opportunities as long as ISOL@MYRRHA (arrows) overall precision: Ft = (3074.4 ± 1.2) s 4 10-4 single measurements of T1/2 in addition to BR : < 10-3 theoretical corrections: dCoulomb, dRadiative ~ 1% < 10% N. Severijns, 06-09 April 2008, BRiX workshop Weak interaction Physics Research Ft0+ 0+ decay rate as long as beta decay of (un)polarized nuclei : Fierz interference term ( b 0 in st in addition to ard model ) - correlation -asymmetry pe J,D, Jackson, S.B. Treiman, H.W. Wyld, Nucl. Phys. 4 (1957) 206 R-correlation Note: a, b, A, R, depend on the coupling strengths as long as the different possible weak interaction types (i.e A, V, S, T) Weak interaction Physics Research Exotic weak currents in addition to symmetry tests via precision correlation experiments between spin en momentum vectors Weak interaction Physics Research - momentum correlation measure nuclear recoil use ion traps -correlation from Doppler-shift of -delayed -rays Doppler shift from precise measurement of -ray energy with a crystal spectrometer -asymmetry emission direction from polarised nuclei R-correlation combination of particle spin polarisation in addition to nuclear polarisation Paul trap MOT trap Precision experiments with long beam times data taking (statistics) instrument calibration (systematic errors) Nuclear physics with exotic light nuclei C in addition to idate nuclei as long as spectroscopy experiments Alkali in addition to gaseous elements He, Li, Ne, Na, C , N Decay spectroscopy (beta-decay) implant in catcher foil / detector – trap polarized beams Ex. 11Li detectors as long as , , charged particles, n Reactions ! astrophysics, p capture – n capture requires post acceleration Nuclear physics with exotic light nuclei Possible subjects -delayed particle emission n/p emission study of p/ competition multiple particle emission 2p : only data as long as 31Ar 2n :emission (very limited in as long as mation 11Li, 19C, 30-34Na, 52K d/t emission (6He (,d); 8He (,t)) new branches 8He (,d); 11Li (,pn) t 29,30,32Ne, 32,33,34Na; d 32Ne, 34Na Energetically allowed decays Nuclear physics with exotic light nuclei Possible subjects decay of ‘Halo’ nuclei decay into continuum clustering Other cluster decays 12C – 3 ’s decay of 12N/B 13N/C – add nucleon decay of 13O/B 16O – 4 ’s / 12C+ decay of 16N Multi-particle states Isospin symmetry All decays with low branching ratios Naive picture: nucleons outside of normal nucleus are sensitive to correlations 12C continuum needed as long as triple- process Solid state physics with nuclear probes : 8Li -NMR produce polarized 8Li circularly polarized laser light asymmetry in -decay of 8Li Implant 8Li in surface destroy asymmetry by sending in NMR signal Frequency in addition to line shape tells about interaction between solid in addition to 8Li What happens near in addition to interface We go from 3D to 2D system Changes in magnetic, electronic in addition to structural properties. Questions: How/why do the properties change On what scale Motivation: Better underst in addition to ing of both bulk in addition to interface Application in devices. Solid state physics with nuclear probes : 8Li -NMR Induced hyperfine fields in magnetic multilayers Magnetic properties of a monolayer of single molecule magnets Vortices near a surface (NbSe2) Examples -NMR well suited to study berried interfaces in addition to thin films Broad range of applications as long as studying depth dependence of magnetic, electronic in addition to structural properties on a nm length scale. Emission channeling lattice location of radioisotopes Determination of lattice location 0.1-0.01 Å precision Single crystals Characteristic emission pattern Comparison with simulations Applicable as long as wide range of radio-impurities Application to semiconductors, metals in addition to oxides A MYRRHA-based ISOL facility offers opportunities as long as emission channeling experiments, particularly as long as 8Li, 20Na, in addition to rare earth a emitters. Solid state physics with nuclear probes ISOL@MYRRHA is an integral part of the MYRRHA project Workplan – roadmap (close contact between possible users in addition to the MYRRHA team): Approval in addition to initial funding of the MYRRHA project Preliminary report physics cases : look what will (is planned to be) done by 2020. technical specifications from the users point of view budget plan/estimate Establishing a users group (including users outside of nuclear physics) Gathering ISOL expertise at SCK CEN Operational model Time line Further applications as long as the full 2.5 mA beam (neutron factory) (Open) issues & future Our purpose today is to convince NuPECC community that ISOL@MYRRHA is of interest in addition to will contribute to reach a needed objective Science towards Sustainability Conclusion Hanson, Teri Fit Pregnancy Fitness Editor

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