Coulomb excitation

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<strong>Coulomb</strong> <strong>excitation</strong> and lifetime measurements6 17820 165411988 27499677684 10145582 4564560 012022112120274650891069474 Kr42017411233 1285• results inconsistent withpreviously published lifetimes• new RDM lifetimemeasurement:Köln Plunger & GASP40 Ca ( 40 Ca,α2p) 74 Kr40 Ca ( 40 Ca,4p) 76 Kr2• subdivision of data in several ranges ofscattering angle• spectroscopic data (lifetimes, branchingand mixing ratios)• least squares fit of ∼30 matrix elements(transitional and diagonal)N γ/ N Kr0.080.070.060.050.040.030.020.012 1+4 1+old τ020 30 40 50 60 70θ c.m.(deg)Magda Zielińska, CEA Saclay HIL student workshop, 1 March 2012 - p. 20/23
Lifetime measurement A. Görgen et al. EPJ A 26 153 (2005)76 Krold new old new2 + 35.3(10) ps 41.5(8) ps 74 Kr 2 + 28.8(57) ps 33.8(6) ps4 + 4.8(5) ps 3.87(9) ps 4 + 13.2(7) ps 5.2(2) ps74 Kr, forward detectors (36 ◦ )gated from above80060040020001000500060040020002 + 80216 µm 4 + 50 µm 6 + 7.5 µm1500601000400.040.03500200.0200400 µm99 µm18 µm300400.013020020020 30 40 50 60 70800 µm455.7440 450 460 470 480E γ[keV]1000200150100500550 560 570 580 590E γ[keV]10216 µm 25 µm80557.906040200768.4760 770 780 790 800E γ[keV]N γ/ N Kr0.080.070.060.052 1+4 1+new τθ c.m.(deg)• new lifetimes in agreement with Coulex• enhanced sensitivity for diagonal andintra-band transitional matrix elementsMagda Zielińska, CEA Saclay HIL student workshop, 1 March 2012 - p. 21/23
Page 1 and 2: Basic facts about Coulex• Due to
Page 3 and 4: Basic facts about Coulex experiment
Page 5 and 6: }Why do we like Coulomb excitation?
Page 9 and 10: Magda Zielińska, CEA Saclay HIL st
Page 11 and 12: Validity of classical Coulomb traje
Page 17 and 18: Exotic beam experiments• usually
Page 19: Reorientation effect• influence o
Page 23: Gamma-particle angular correlations

Coulomb excitation

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