Determination of β-decay feeding patterns of 88Rb and 88Kr using the Modular Total Absorption Spectrometer at ORNL HRIBF

Shuai, Peng; Rasco, B. C.; Rykaczewski, Krzysztof P.; Fijalkowska, A.; Karny, Marek; Wolinska-Cichocka, Marzena; Grzywacz, Robert Kazimierz; Gross, Carl J.; Stracener, Dan W.; Zganjar, E. F.; Batchelder, Jon C.; Blackmon, Jeffery C.; Brewer, Nathan T.; Go, Shintaro; Cooper, Michael P.; Goetz, K. C.; Johnson, James W.; Jost, Carola U.; King, Toby T.; Matta, James T.; Hamilton, J. H.; Laminack, Alex M.; Miernik, Krzysztof; Madurga Flores, Miguel; Miller, David; Nesaraja, Caroline D.; Padgett, Stephen; Paulauskas, Stanley; Rajabali, Mustafa M.; Ruland, Thomas J.; Stepaniuk, Michal; Wang, E. H.; Winger, J. A.

doi:10.1103/PhysRevC.105.054312

Title: Determination of β-decay feeding patterns of ⁸⁸Rb and ⁸⁸Kr using the Modular Total Absorption Spectrometer at ORNL HRIBF

Journal Article · Wed May 18 00:00:00 EDT 2022 · Physical Review. C

DOI:https://doi.org/10.1103/PhysRevC.105.054312· OSTI ID:1870201

Shuai, Peng ^[1]; Rasco, B. C. ^[2];

^[3]; Fijalkowska, A. ^[4]; Karny, Marek ^[5];

^[5];

^[2]; Gross, Carl J. ^[3];

^[3]; Zganjar, E. F. ^[6]; Batchelder, Jon C. ^[7]; Blackmon, Jeffery C. ^[6]; Brewer, Nathan T. ^[2]; Go, Shintaro ^[8]; Cooper, Michael P. ^[8]; Goetz, K. C. ^[8]; Johnson, James W. ^[3]; Jost, Carola U. ^[3]; King, Toby T. ^[3];

^[3] more »

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States); Chinese Academy of Sciences (CAS), Lanzhou (China)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of Warsaw (Poland); Univ. of Tennessee, Knoxville, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Warsaw (Poland)
Louisiana State Univ., Baton Rouge, LA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of California, Berkeley, CA (United States)
Univ. of Tennessee, Knoxville, TN (United States)
Vanderbilt Univ., Nashville, TN (United States)
Univ. of Warsaw (Poland)
Univ. of Tennessee, Knoxville, TN (United States); Idaho National Lab. (INL), Idaho Falls, ID (United States)
Tennessee Technological Univ., Cookeville, TN (United States)
Mississippi State Univ., Mississippi State, MS (United States)

We report precise determination of ground-state feeding in the β decay of fission products is an important but challenging component in modeling reactor antineutrino flux and reactor decay heat. The Modular Total Absorption Spectrometer (MTAS) is a versatile NaI(Tl) detector array that determines the true β-decay pattern free from the pandemonium effect, including precise ground-state feeding intensities. In this paper, we report MTAS results of the β feeding intensities of ⁸⁸Rb and ⁸⁸Kr, fission products with large cumulative yields in nuclear reactors. By comparing MTAS results with previous measurements, ⁸⁸Rb provides a validation of MTAS's ability to determine ground-state feedings in β decays, while the precision of ⁸⁸Kr ground-state feeding is improved when compared with the Evaluated Nuclear Structure Data File (ENSDF). The investigation of sources that contribute to β feeding branching uncertainties in MTAS experiments is discussed in detail. Lastly, the deconvolution of ⁸⁸Rb decay spectra suggests that MTAS can distinguish an allowed β spectral shape from a first forbidden unique β spectral shape.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Idaho National Lab. (INL), Idaho Falls, ID (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP); Polish National Centre for Science

Grant/Contract Number:: AC05-00OR22725; FG02-96ER40983; FG02-96ER40978; FG02-96ER41006; FG-05-88ER40407; UMO-2013/08/T/ST2/00624; UMO-2015/18/E/ST2/00217

OSTI ID:: 1870201

Journal Information:: Physical Review. C, Vol. 105, Issue 5; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Determination of β-decay feeding patterns of 88Rb and 88Kr using the Modular Total Absorption Spectrometer at ORNL HRIBF

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Title: Determination of β-decay feeding patterns of ⁸⁸Rb and ⁸⁸Kr using the Modular Total Absorption Spectrometer at ORNL HRIBF