6533b85bfe1ef96bd12baad3
RESEARCH PRODUCT
Highly efficient isotope separation and ion implantation of 163Ho for the ECHo project
Christoph E. DüllmannH. DorrerKlaus WendtT. KieckF. SchneiderVadim Maratovich Gadelshinsubject
Accelerator Physics (physics.acc-ph)PhysicsNuclear and High Energy PhysicsAtomic Physics (physics.atom-ph)Orders of magnitude (temperature)DetectorAnalytical chemistryFOS: Physical sciencesLaser01 natural sciencesPhysics - Atomic Physics010305 fluids & plasmasIsotope separationlaw.inventionIonIon implantationlawIonization0103 physical sciencesSapphirePhysics - Accelerator Physics010306 general physicsInstrumentationdescription
Abstract The effective electron neutrino mass measurement in the framework of the ECHo experiment requires radiochemically pure 163 Ho, which is ion implanted into detector absorbers. To meet the project specifications in efficiency and purity, the entire process chain of ionization, isotope separation , and implantation of 163Ho was optimized. A new two-step resonant laser ionization scheme was established at the 30 kV magnetic mass separator RISIKO. For ionization and separation, an average efficiency of 69 ( 5 ) stat(4)sys% was achieved using intra-cavity frequency doubled Ti:sapphire lasers. The implantation of undesired 166 m Ho, which is present in trace amounts in the initial 163Ho sample is suppressed by about five orders of magnitude by the mass separation. A dedicated implantation stage with focusing and scanning capability enhances the geometric implantation efficiency into the ECHo detectors to 20(2) %.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-04-11 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |