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P-378 , INTC, Jul 2013

This study focuses on laser spectroscopy of tin and cadmium isotopes, specifically those with N=82 and approaching N=50. The motivation is to investigate ground-state properties, spin, charge radii, and moments of these isotopes. Experimental methods include ion beam, laser, deflection plates, post-acceleration, and optical detection. The proposed range of studies includes isotopes from 104-136Sn and 99, 131Cd.

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P-378 , INTC, Jul 2013

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  1. Laser Spectroscopy of Tin and Cadmium: Across N = 82 and Closing in on N = 50 D. T. Yordanov1, D. L. Balabanski2, M. L. Bissell3, K. Blaum1, I. Budinčević3, N. Frömmgen4, R. F. Garcia Ruiz3, G. Georgiev6, Ch. Geppert5,7, M. Hammen4, M. Kowalska7, R. Neugart4, G. Neyens3, W. Nörtershäuser6, J. Papuga3, R. Sánchez8 1Max Planck Institute for Nuclear Physics, Saupfercheckweg 1, 69117 Heidelberg, Germany 2INRNE, Bulgarian Academy of Science, BG-1784 Sofia, Bulgaria 3Instituut voor Kern- en Stralingsfysica, KU Leuven, B-3001 Leuven, Belgium 4Institut fürKernchemie, Universität Mainz, D-55099 Mainz, Germany 5CSNSM-IN2P3-CNRS, Université de Paris Sud, F-91405 Orsay, France 6Technische Universität Darmstadt, 64289 Darmstadt, Germany 7Organisation Européenne pour la RechercheNucléaire, CH-1211 Geneva 23, Switzerland 8GSI HelmholtzzentrumfürSchwerionenforschung GmbH, D-64291 Darmstadt, Germany P-378, INTC, Jul 2013

  2. Nuclear Chart 50 A decade of collinear laser spectroscopy at ISOLDE 82 Monopole migration Ga Spherical Shell Model Cu Mn 50 Z 28 50 1g9/2 50 40 2p1/2 N 38 1f5/2 2p 32 2p3/2 20 1f 28 1f7/2 28 Li K Ca Be 20 1d3/2 20 28 2s Island of inversion 2s 16 1d Mg Ne Na 8 1d5/2 14 20 8 2 1p1/2 8 1p 8 1p3/2 6 Halo nuclei 2 2 1s 1s 2 P-378, INTC, Jul 2013

  3. Nuclear Chart 50 Cd 82 Last COLLAPS study at Z ≈ 50: Indium, Nucl. Phys. A464, 9 (1987) Spherical Shell Model 92 1h9/2 Z 28 50 N 82 1h 20 82 1h11/2 3s1/2 70 3s 28 2d3/2 68 8 2d 20 2d5/2 64 1g7/2 58 2 8 50 1g 2 1g9/2 50 P-378, INTC, Jul 2013

  4. Motivation Survey of ground-state properties in the Z ≈ 50 region 132Sn 100Sn rp process r process P-378, INTC, Jul 2013

  5. Motivation Proposed range of studies: 104-136Sn and 99, 131Cd 104-136Sn 99Cd 131Cd Recent work on 100-130Cd @ COLLAPS P-378, INTC, Jul 2013

  6. Motivation Proposed range of studies: 104-136Sn and 99, 131Cd 104-136Sn 99Cd 131Cd Recent work on 100-130Cd @ COLLAPS P-378, INTC, Jul 2013

  7. Motivation 2j+1-2n ‹jn|Q|j n› = ‹j|Q|j› Results from IS-497 (P-271) 2j-1 Fig. 1 (a) h11/2 Phys. Rev. Lett., 110, 192501 (2013) P-378, INTC, Jul 2013

  8. Motivation Existing results on the Sn Q moments Fig. 1 (b) P-378, INTC, Jul 2013

  9. Motivation Charge radii across N = 82 Fig. 2 P-378, INTC, Jul 2013

  10. n-conv., quartz, (LIST) RILIS p+ HRS ISCOOL GPS COLLAPS P-378, INTC, Jul 2013

  11. Experiment Experimental method COLLAPS 1.) ion beam; 2.) laser; 3.) deflection plates; 4.) post acceleration; 5.) optical detection accumulation ISCOOL - ISOLDE RFQCB release T1 T2 ≈ T1 / 104 P-378, INTC, Jul 2013

  12. Experiment Yields of cadmium N = 82 N = 50 UC + RILIS (PSB) LaC + RILIS (PSB) ions/mC molten Sn (SC) feasibility limit ≈ 103 ions/s 99Cd 131Cd A 130Cd 100Cd (measured in 2012, IS-497) Nucl. Instr. Meth. B, 204, 347 (2003) P-378, INTC, Jul 2013

  13. Experiment Yields of tin ISCOOL saturation limit Accessible: 104-136Sn ions/s N = 82 feasibility limit ≈ 103 ions/s Sn, LaC + RILIS, 1.4 GeV p Sn, UC + RILIS, p Sn, LaC +RILIS, 1 GeV p Sn, LaC +RILIS, n In, LaC A Nucl. Instr. Meth. B, 266, 4229 (2008) P-378, INTC, Jul 2013

  14. Beam-time request BEAM-TIME REQUEST for measuring spins, rms charge radii, magnetic and quadrupole moments of ground and isomeric states in the isotopes of tin & cadmium • 104-113Sn:LaC RILIS / HRS / ISCOOL 10 shifts • 121-136Sn: UC RILIS / HRS / ISCOOL / n-converter / (LIST) 12 shifts • 99Cd:LaC RILIS / HRS / ISCOOL 10 shifts • 131Cd: UC RILIS / HRS / ISCOOL / n-converter / quartz line12 shifts • Radioactive beam TOTAL: 44 shifts • Stable beam:6 shifts P-378, INTC, Jul 2013

  15. P-378, INTC, Jul 2013

  16. Experiment Ionization energy 7.3 eV 5p6s 3P1 Large A, Small B 4.3 eV Sn - atom Eberz et.al. Anselment et. al. Le Blanc et.al. 563 nm, 5×105 s-1 Na I ionization energy: 5.14eV 380 nm, 3.7×107 s-1 2.1 eV 318 nm, 8.4×107 s-1 5p21S0 301 nm, 3.7×107 s-1 286 nm, 5.8×107 s-1 1.1 eV 5p21D2 0.4 eV 5p23P2 0.2 eV 5p23P1 5p23P0 P-378, INTC, Jul 2013

  17. Experiment Ionization energy 7.3 eV 5p6s 1P1 Large B, Small A 4.9 eV Sn - atom Eberz et.al. 453 nm, 1.4×107 s-1 Na I ionization energy: 5.14eV 326 nm, 3.3×108 s-1 2.1 eV 5p21S0 266 nm, 1.6×107 s-1 255 nm, 2.9×107 s-1 1.1 eV 5p21D2 0.4 eV 5p23P2 0.2 eV 5p23P1 5p23P0 P-378, INTC, Jul 2013

  18. Experiment Sn - ion 5s5p24P3/2 6.0 keV 5s5p24P1/2 5.8 keV 226 nm, 1.0×108 s-1 206 nm, 1.2×108 s-1 215 nm, 2.3×108 s-1 0.5 keV 5p 2P3/2 5p 2P1/2 P-378, INTC, Jul 2013

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