Fission Yields Measurements at IGISOL-4 "
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1 Fission Yields Measurements at IGISOL-4 " H. Penttilä, for the IGISOL group & collaborations!
2 Short recall: fission ion guide technique" Based on survival of primary ions from nuclear reaction in helium buffer gas! Fast extraction of ions is required to prevent neutralisation! Charge state concentration: (0), +1, (+2)! Ion formation independent of chemistry " Produces ions of any element! Millisecond time scale!!very small decay losses! All ions come directly from fission" Ion rate corresponds to the independent fission yield -! no*) accumulation effects! No gaps in the systematic studies! Study the most neutron rich nuclei produced in the fission (isobaric background usually sets the limit)! " Target! Extractor SPIG electrode! Beam!
3 Fission yields with a Penning trap" Rh Reference spectrum 114 Pd 114 Ag 115 Pd A = 114 A = 115 Based on unambiguous identification of isotopes by their mass only.!! - No further knowledge on e.g. decay is needed! - Fast! - Yield of long-lived and stable isotopes can be determined! Ag Rh Cd Rh 116 Pd 116 Ag A = Fit results for Pd χ 2 = <A> = ± 0.07 W = 2.81 ± x Eur. Phys. J. Special Topics 150 (2007) 317! Nucl. Instr. and Meth. A 576 (2007) 371! Eur. Phys. J. A 44 (2010) 140! Eur. Phys. J. A 48 (2012) 43!
4 From IGISOL-3 " to IGISOL-4 MCP Beta coun2ng Target JYFLTRAP RFQ-cooler Dipole magnet
5 From IGISOL-3 " to IGISOL-4 MCP Beta coun2ng Target JYFLTRAP RFQ-cooler Dipole magnet Reproduced with kind permission of the European Physical Journal (EPJ).
6 From IGISOL-3 * Dec 3, 2003! June 29, 2010! " to IGISOL-4 MCP Beta coun2ng Target JYFLTRAP RFQ-cooler Dipole magnet Reproduced with kind permission of the European Physical Journal (EPJ).
7 From IGISOL-3 * Dec 3, 2003! June 29, 2010! " to IGISOL MCP Beta coun2ng Target JYFLTRAP RFQ-cooler Dipole magnet 8 I. Moore et al, EMIS Reproduced with kind permission of the European Physical Journal (EPJ).
8 Fission at IGISOL-4 "
9 Fission at IGISOL-4 "
10 Isomeric ratios of fission yields" !
11 Isomeric ratios of fission yields" !
12 Isomeric ratios of fission yields" !
13 Isomeric ratios of fission yields" !
14 Neutron-induced fission"
15 Neutron-induced fission" MCC30/ MeV H- cyclotron 100 µa beam designed 220 µa beam measured (internal)
16 Neutron-induced fission" MCC30/ MeV H- cyclotron 100 µa beam designed 220 µa beam measured (internal) T. Rinckel et al Phys. Procedia 26 (2012) 168 P + Be
17 T. Rinckel et al Phys. Procedia 26 (2012) 168 Neutron-induced fission" P + Be
18 T. Rinckel et al Phys. Procedia 26 (2012) 168 Neutron-induced fission" P + Be M. Lantz et al, Physica Scripta T150 (2012)
19 T. Rinckel et al Phys. Procedia 26 (2012) 168 Neutron-induced fission" P + Be M. Lantz et al, Physica Scripta T150 (2012) G. Savard, SMI-10 conference, Stanford, April 2010
20 Summary" IGISOL-4 facility at JYFL has finally become operational! The measured fission yield 300 atoms/(µc * mbarn)! JYFLTRAP penning trap has sufficient performance for yield measurements! => IGISOL ready for fission yields measurements!
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