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

P. Shuai; B. C. Rasco; K. P. Rykaczewski; A. Fijałkowska; M. Karny; M. Wolińska-Cichocka; R. K. Grzywacz; C. J. Gross; D. W. Stracener; E. F. Zganjar; J. C. Batchelder; J. C. Blackmon; N. T. Brewer; S. Go; M. Cooper; K. C. Goetz; J. W. Johnson; C. U. Jost; T. T. King; J. T. Matta; J. H. Hamilton; A. Laminack; K. Miernik; M. Madurga; D. Miller; C. D. Nesaraja; S. Padgett; S. V. Paulauskas; M. M. Rajabali; T. Ruland; M. Stepaniuk; E. H. Wang; J. A. Winger

doi:10.1103/PhysRevC.105.054312

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

P. Shuai, B. C. Rasco, K. P. Rykaczewski, A. Fijałkowska, M. Karny, M. Wolińska-Cichocka, R. K. Grzywacz, C. J. Gross, D. W. Stracener, E. F. Zganjar, J. C. Batchelder, J. C. Blackmon, N. T. Brewer, S. Go, M. Cooper, K. C. Goetz, J. W. Johnson, C. U. Jost, T. T. King, J. T. MattaJ. H. Hamilton, A. Laminack, K. Miernik, M. Madurga, D. Miller, C. D. Nesaraja, S. Padgett, S. V. Paulauskas, M. M. Rajabali, T. Ruland, M. Stepaniuk, E. H. Wang, J. A. Winger

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Abstract

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 Rb88 and Kr88, fission products with large cumulative yields in nuclear reactors. By comparing MTAS results with previous measurements, Rb88 provides a validation of MTAS's ability to determine ground-state feedings in β decays, while the precision of Kr88 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 Rb88 decay spectra suggests that MTAS can distinguish an allowed β spectral shape from a first forbidden unique β spectral shape.

Original language	English
Article number	054312
Journal	Physical Review C
Volume	105
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.105.054312
State	Published - May 2022

Funding

We would like to thank the ORNL Tandem operations staff for providing the excellent quality proton beams necessary for this work. This work was partially supported through the DOE Nuclear Data program, within the FOA 18 1903 project. This research was also sponsored by the Office of Nuclear Physics, U.S. Department of Energy under Contracts No. DE-AC05-00OR22725 (ORNL), No. DE-FG02-96ER40983 (UTK), No. DE-FG02-96ER40978 (LSU), No. DE-FG02-96ER41006 (MSU), No. DE-FG-05-88ER40407 (VU), and under Contract No. UMO-2016/23/B/ST2/03559 from the Polish National Centre for Science. P.S. is supported by CSC-FRIB Postdoctoral Fellowship Grant No. 201804910906. This work was also supported and inspired by the IAEA Coordinated Research Project for a ‘Reference Database for -Delayed Neutron Emission.”

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Shuai, P., Rasco, B. C., Rykaczewski, K. P., Fijałkowska, A., Karny, M., Wolińska-Cichocka, M., Grzywacz, R. K., Gross, C. J., Stracener, D. W., Zganjar, E. F., Batchelder, J. C., Blackmon, J. C., Brewer, N. T., Go, S., Cooper, M., Goetz, K. C., Johnson, J. W., Jost, C. U., King, T. T., ... Winger, J. A. (2022). Determination of β -decay feeding patterns of Rb 88 and Kr 88 using the Modular Total Absorption Spectrometer at ORNL HRIBF. Physical Review C, 105(5), Article 054312. https://doi.org/10.1103/PhysRevC.105.054312

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

abstract = "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 Rb88 and Kr88, fission products with large cumulative yields in nuclear reactors. By comparing MTAS results with previous measurements, Rb88 provides a validation of MTAS's ability to determine ground-state feedings in β decays, while the precision of Kr88 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 Rb88 decay spectra suggests that MTAS can distinguish an allowed β spectral shape from a first forbidden unique β spectral shape.",

author = "P. Shuai and Rasco, {B. C.} and Rykaczewski, {K. P.} and A. Fija{\l}kowska and M. Karny and M. Woli{\'n}ska-Cichocka and Grzywacz, {R. K.} and Gross, {C. J.} and Stracener, {D. W.} and Zganjar, {E. F.} and Batchelder, {J. C.} and Blackmon, {J. C.} and Brewer, {N. T.} and S. Go and M. Cooper and Goetz, {K. C.} and Johnson, {J. W.} and Jost, {C. U.} and King, {T. T.} and Matta, {J. T.} and Hamilton, {J. H.} and A. Laminack and K. Miernik and M. Madurga and D. Miller and Nesaraja, {C. D.} and S. Padgett and Paulauskas, {S. V.} and Rajabali, {M. M.} and T. Ruland and M. Stepaniuk and Wang, {E. H.} and Winger, {J. A.}",

note = "Publisher Copyright: {\textcopyright} 2022 American Physical Society.",

year = "2022",

month = may,

doi = "10.1103/PhysRevC.105.054312",

language = "English",

volume = "105",

journal = "Physical Review C",

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Shuai, P, Rasco, BC, Rykaczewski, KP, Fijałkowska, A, Karny, M, Wolińska-Cichocka, M, Grzywacz, RK, Gross, CJ, Stracener, DW, Zganjar, EF, Batchelder, JC, Blackmon, JC, Brewer, NT, Go, S, Cooper, M, Goetz, KC, Johnson, JW, Jost, CU, King, TT , Matta, JT, Hamilton, JH, Laminack, A, Miernik, K, Madurga, M, Miller, D, Nesaraja, CD, Padgett, S, Paulauskas, SV, Rajabali, MM, Ruland, T, Stepaniuk, M, Wang, EH & Winger, JA 2022, 'Determination of β -decay feeding patterns of Rb 88 and Kr 88 using the Modular Total Absorption Spectrometer at ORNL HRIBF', Physical Review C, vol. 105, no. 5, 054312. https://doi.org/10.1103/PhysRevC.105.054312

TY - JOUR

T1 - Determination of β -decay feeding patterns of Rb 88 and Kr 88 using the Modular Total Absorption Spectrometer at ORNL HRIBF

AU - Shuai, P.

AU - Rasco, B. C.

AU - Rykaczewski, K. P.

AU - Fijałkowska, A.

AU - Karny, M.

AU - Wolińska-Cichocka, M.

AU - Grzywacz, R. K.

AU - Gross, C. J.

AU - Stracener, D. W.

AU - Zganjar, E. F.

AU - Batchelder, J. C.

AU - Blackmon, J. C.

AU - Brewer, N. T.

AU - Go, S.

AU - Cooper, M.

AU - Goetz, K. C.

AU - Johnson, J. W.

AU - Jost, C. U.

AU - King, T. T.

AU - Matta, J. T.

AU - Hamilton, J. H.

AU - Laminack, A.

AU - Miernik, K.

AU - Madurga, M.

AU - Miller, D.

AU - Nesaraja, C. D.

AU - Padgett, S.

AU - Paulauskas, S. V.

AU - Rajabali, M. M.

AU - Ruland, T.

AU - Stepaniuk, M.

AU - Wang, E. H.

AU - Winger, J. A.

PY - 2022/5

Y1 - 2022/5

N2 - 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 Rb88 and Kr88, fission products with large cumulative yields in nuclear reactors. By comparing MTAS results with previous measurements, Rb88 provides a validation of MTAS's ability to determine ground-state feedings in β decays, while the precision of Kr88 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 Rb88 decay spectra suggests that MTAS can distinguish an allowed β spectral shape from a first forbidden unique β spectral shape.

AB - 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 Rb88 and Kr88, fission products with large cumulative yields in nuclear reactors. By comparing MTAS results with previous measurements, Rb88 provides a validation of MTAS's ability to determine ground-state feedings in β decays, while the precision of Kr88 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 Rb88 decay spectra suggests that MTAS can distinguish an allowed β spectral shape from a first forbidden unique β spectral shape.

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U2 - 10.1103/PhysRevC.105.054312

DO - 10.1103/PhysRevC.105.054312

M3 - Article

AN - SCOPUS:85131334647

SN - 2469-9985

VL - 105

JO - Physical Review C

JF - Physical Review C

IS - 5

M1 - 054312

ER -

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

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