General GroupingsProton-Rich
D. Seweryniak (structure around 100Sn)CARIBU
D. Hartley (triaxial nuclei), D. Kulp (neg. parity bands)C. Chiara (RIB + 7Li), R. Janssens (g-factor studies)N. Koller (g-factor studies), R. Casten (binding
energies)V. Werner (fast timing lifetime measurements)
Heavy ElementsW. Loveland (make them), A. Heinz (structure)T.L. Khoo (single-particle energies)
High-SpinL. Riedinger (tetrahedral), S. Tabor (island of
inversion)X. Wang (ultra high-spin)
Experimental Needs for 100SnMain emphasis on excited states in 100Sn and single-
particle states and nucleon-nucleon interactions using in-beam spectroscopy
More intense beamsPush rates in GAMMASPHERE (x5)
Digital GS Beams 100-200 pnA
Channel selection – tagging with decays (, p, p, ) High granularity DSSD
Secondary fusion-evaporation reactionsIn-flight radioactive beamsBeams 10 pA
CARIBU: g-factors
252Cf + GammasphereA.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. StuchberyNoemie wants to do clean 138Xe
CARIBU: Interesting stuff @ N≈90
Two regions of parabolic anomalies.
Two regions of octupole correlations
Possible signature?
CARIBU: Coulex BeamsSkalski et al. find
stable γ minimumAlso see superdefJ. Hamilton et al. &
C.Y. Wu et al. pushed up around I=20
Safe Coulex to measure Q0
Unsafe Coulex to go beyond I=20
100Zr 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 ListIntensity, intensity, intensity
Long experiments
Complicated setup → campaigns
Dedicated detection system → complete spectroscopy
Phase I will certainly help this group!
High-spinTriaxial 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
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