High-resolution spectroscopy of gaseous Kr-83m conversion electrons with the KATRIN experiment

Altenmuller K., Arenz M., Baek W-J,Beck M.,Beglarian A.,Behrens J.,Bergmann T.,Berlev A., Besserer U.,Blaum K.,Block F., Bobien S.,Bode T.,Bornschein B.,Bornschein L., Brunst T.,Buzinsky N.,Chilingaryan S.,Choi W. Q., Deffert M.,Doe P. J., Dragoun O., Drexlin G., Dyba S., Edzards F., Eitel K., Ellinger E., Engel R.,Enomoto S., Eversheim D.,Fedkevych M.,Formaggio J. A.,Frankle F. M.,Franklin G. B., Friedel F., Fulst A.,Gil W.,Gluck F.,Urena A. Gonzalez,Grohmann S., Groessle R., Gumbsheimer R., Hackenjos M.,Hannen V, Harms F.,Haussmann N., Heizmann F., Helbing K., Hickford S., Hilk D., Hillesheimer D., Hinz D.,Howe M. A.,Huber A., Jansen A., Kellerer J.,Kernert N., Kippenbrock L.,Klein M.,Kopmann A., Korzeczek M.,Kovalik A.,Krasch B.,Kraus M., Lasserre T.,Lebeda O., Letnev J.,Lokhov A., Machatschek M.,Marsteller A.,Martin E. L.,Mertens S.,Mirz S.,Monreal B.,Neumann H.,Niemes S., Off A.,Osipowicz A.,Otten E.,Parno D. S., Plischke P.,Pollithy A.,Poon A. W. P., Priester F., Ranitzsch P. C-O,Rest O., Robertson R. G. H.,Roccati F., Rodenbeck C., Roellig M., Rottele C.,Rysavy M., Sack R.,Saenz A., Schimpf L., Schloesser K., Schloesser M., Schoenung K.,Schrank M., Seitz-Moskaliuk H., Sentkerestiova J., Sibille V,Slezak M.,Steidl M.,Steinbrink N.,Sturm M.,Suchopar M.,Suesser M.,Telle H. H., Thorne L. A., Thuemmler T., Titov N., Takachev I,Trost N.,Valerius K., Venos D.,Vianden R.,Hernandez A. P. Vizcaya,Weber M.,Weinheimer C., Walte S.,Wendel J.,Wilkerson J. F.,Wolf J., Wustling S., Zadoroghny S.,Zeller G.

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS（2020）

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摘要

In this work, we present the first spectroscopic measurements of conversion electrons originating from the decay of metastable gaseous Kr-83m with the Karlsruhe Tritium Neutrino (KATRIN) experiment. The obtained results represent one of the major commissioning milestones for the subsequent direct neutrino mass measurement with KATRIN. The successful campaign demonstrates the functionalities of the KATRIN beamline. Precise measurement of the narrow K-32, L-3-32, and N-2,N-3-32 conversion electron lines allowed to verify the eV-scale energy resolution of the KATRIN main spectrometer necessary for competitive measurement of the absolute neutrino mass scale.

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关键词

neutrino mass,electrostatic spectrometer,calibration,conversion electrons

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