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The LaSpec project
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At FAIR…
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Cheapest(?),Fully destripped…
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Still cooled:
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TDR available…
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Final layout…
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MATS LaSpec RFQ mass separation Ions Atoms gas catcher / inverse cyclotron Ions from Super-FRS 13 m 10 m 210 m² LaSpec laser lab 55 m² annex building 6b --second floor-- MATS lab W. Nörtershäuser et al., Hyperfine Interactions 171 (2006) Previous “final” layout… *
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Ground State Properties Isotope Shift (IS)Hyperfine Structure (HFS) Nuclear Spin I Magnetic Dipole Moment I Electric Quadrupole Moment Q s Hyperfine Anomaly Mean Square Charge Radii
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K Cu Na
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Wavelength ~ 589 – 590 nm
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Na Fine structure at part per thousand level Now excite the transition with a laser...
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Super zoom....line ~10 15 Hz
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Ground State Properties MODEL INDEPENDENT ISOLATED STATE J, magnetic moment, Q s,
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At FAIR…
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To the very neutron rich…..to find?..with what signature? (..using an EM probe to explore neutral particles?)
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Aufmuth et al. ADNDT 37 (1987) 3
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N Samarium Interpreting?
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S 2n (N,Z) = B(N,Z) – B(N – 2,Z) Discontinuity of S 2n observed for Sr-Rb isotopes at N=60
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S 2n (N,Z) = B(N,Z) – B(N – 2,Z) Discontinuity of S 2n observed for Sr-Rb isotopes at N=60
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Rb Sr Y Zr Nb Mo Kr The NEW mass and charge radii data...
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NOW we’re consistent... (also, never wrong...) (like a geophysical survey...)
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Laser Spectroscopy at the LEB next door to MATS...
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RFQ Spectroscopy 7 T superconducting solenoid @ 30 kV: Purification trap ( M/M < 10 -5 ): Precision trap ( M/M < 10 -6 ): V. Kolhinen et al., NIM A 528 (2004) 776 S. Rinta-Antila et al., PRC 70 (2004) 011301(R) A. Jokinen et al., IJMS 251 (2006) 241 K130-accelerator + IGISOL: Mass-separated 1+ DC ion beam at 30 keV of all elements.
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Both need stopped beam… Beam cooler ~100eV Fragment stopper GeV
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ß-NMR LD-RIS +ν tag Coincidence and decay tagged atom/ion spec. LD-RIS Bunched beam spectroscopy At FAIR…
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The IGISOL facility, JYFL Frequency (MHz) 102 101 100 99 98 96 94 93 92 95 97 50 – 5000 ions per sec
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To the very neutron rich…..to find?..with what signature?..using an EM probe to explore neutral particles?
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To date; All shell closures, Sub-shell closures, N=88, Zr region, Octupole regions, Shape coexistence, Haloes??
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NB: Qs 9 Li ~ Qs 11 Li !! Sanchez et al. PRL 96 03002 (2006) 8 Li 20945.8 9 Li 24954.9 11 Li 40728.3
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Protons and neutrons… Just the protons…
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For the future... Guenaut et al. J.Phys.G 31 (2005) S1765
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Baldrick... Guenaut et al. J.Phys.G 31 (2005) S1765
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Final layout…
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1960
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1980
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1990
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2000
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2009
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2015?
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The IGISOL facility, JYFL Frequency (MHz) 102 101 100 99 98 96 94 93 92 95 97 50 – 5000 ions per sec
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Pumping in the cooler:
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Niobium (improved, cw) +0.03
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Summary: Plenty of atomic concerns but all for nuclear spectroscopy.......and all ready to go
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F Charlwood K Baczynska T Eronen University of Manchester University of Birmingham University of Jyvaskyla Data from… Thanks…
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I=0I≠0I≠0Prolate Frequency (MHz) 102 101 100 99 98 96 94 93 92 Decreasingly strong prolate Yttrium J=0 – J’=1 (363nm) Increasingly oblate 95 97
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Hyperfine anomaly (Ta) Differential anomaly of ~ 1% detected in both lower states; Distribution of nuclear magnetisation has changed (by a huge amount, nb Moskowitz-Lombardi)
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2 2 Hyperfine anomaly: Ta Hafnium charge radii 180 Ta 181 Ta Measure the 180 Ta ground state anomaly … matter radii
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Hyperfine anomaly: Lu Georg et al. Eur Phys J A3 (1998) 225 Au/Al mass
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