General Groupings Proton-Rich D. Seweryniak (structure around 100 Sn) CARIBU D. Hartley (triaxial nuclei), D. Kulp (neg. parity bands) C. Chiara (RIB.

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Presentation transcript:

General Groupings Proton-Rich D. Seweryniak (structure around 100 Sn) CARIBU D. Hartley (triaxial nuclei), D. Kulp (neg. parity bands) C. Chiara (RIB + 7 Li), R. Janssens (g-factor studies) N. Koller (g-factor studies), R. Casten (binding energies) V. Werner (fast timing lifetime measurements) Heavy Elements W. Loveland (make them), A. Heinz (structure) T.L. Khoo (single-particle energies) High-Spin L. Riedinger (tetrahedral), S. Tabor (island of inversion) X. Wang (ultra high-spin)

Experimental Needs for 100 Sn Main emphasis on excited states in 100 Sn and single-particle states and nucleon-nucleon interactions using in-beam spectroscopy More intense beams Push rates in GAMMASPHERE (x5) Digital GS Beams pnA Channel selection – tagging with decays ( ,  p, p,  ) High granularity DSSD Secondary fusion-evaporation reactions In-flight radioactive beams Beams 10 p  A

CARIBU: g-factors 252 Cf + Gammasphere A.G. Smith et al. PLB 591, 55 (2004) Behavior of neutron-rich g factors An example: g factors of n-rich isotopes between Z=40 and Z=50. Why are some g(2 + ) smaller than in the stable isotopes? Use RIV on CARIBU beams to extend and improve precision of data. ** Simultaneous measurement of B(E2) and g factor ** Robert channeled A. Stuchbery Noemie wants to do clean 138 Xe

CARIBU: Interesting N≈90 Two regions of parabolic anomalies. Two regions of octupole correlations Possible signature?

CARIBU: Coulex Beams Skalski et al. find stable γ minimum Also see superdef J. Hamilton et al. & C.Y. Wu et al. pushed up around I=20 Safe Coulex to measure Q 0 Unsafe Coulex to go beyond I= Zr for tetrahedral shape? J. Skalski et al., NPA 617, 282 (1997)

TAKE AWAY POINT: TAKE AWAY POINT: IN ALL CASES, EBIS WILL DRAMATICALLY HELP WITH 10x MORE BEAM!!!!

Heavy Elements

Wish List Intensity, intensity, intensity Long experiments Complicated setup → campaigns Dedicated detection system → complete spectroscopy Phase I will certainly help this group!

High-spin Triaxial strongly deformed bands in N ≈ 94 Er, Hf, Ta, Re, etc. Identify wobbling bands and find linking transitions to floating bands Island of inversion and intruder states in A ≈ 30 Tetrahedral shapes in Dy & U