Recoil-ion detection efficiency for complex β decays studied using the Beta-decay Paul Trap

Munson, J. M.; Siegl, K.; Scielzo, N. D.; Alan, B. S.; Czeszumska, A.; Savard, G.; Aprahamian, A.; Caldwell, S. A.; Chiara, C. J.; Clark, J. A.; Greene, J. P.; Harker, J.; Marley, S. T.; Morgan, G. E.; Norman, E. B.; Orford, R.; Padgett, S. W.; Galvan, A. Perez; Sharma, K. S.; Strauss, S. Y.

doi:10.1016/j.nima.2018.04.063

Title: Recoil-ion detection efficiency for complex $β$ decays studied using the Beta-decay Paul Trap

Journal Article · Wed Aug 01 00:00:00 EDT 2018 · Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment

DOI:https://doi.org/10.1016/j.nima.2018.04.063· OSTI ID:1466933

Munson, J. M. ^[1]; Siegl, K. ^[2]; Scielzo, N. D. ^[3]; Alan, B. S. ^[4]; Czeszumska, A. ^[4]; Savard, G. ^[5]; Aprahamian, A. ^[6]; Caldwell, S. A. ^[5]; Chiara, C. J. ^[7]; Clark, J. A. ^[8]; Greene, J. P. ^[9]; Harker, J. ^[10]; Marley, S. T. ^[11]; Morgan, G. E. ^[12]; Norman, E. B. ^[4]; Orford, R. ^[13]; Padgett, S. W. ^[1]; Galvan, A. Perez ^[9]; Sharma, K. S. ^[12]; Strauss, S. Y. ^[6]

Univ. of California, Berkeley, CA (United States). Dept. of Nuclear Engineering
Univ. of Notre Dame, IN (United States). Dept. of Physics; Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Nuclear and Chemical Sciences Division
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Nuclear and Chemical Sciences Division
Univ. of California, Berkeley, CA (United States). Dept. of Nuclear Engineering; Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Nuclear and Chemical Sciences Division
Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division; Univ. of Chicago, IL (United States). Dept of Physics
Univ. of Notre Dame, IN (United States). Dept. of Physics
Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division; Univ. of Maryland, College Park, MD (United States). Dept. of Chemistry and Biochemistry
Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division; Univ. of Manitoba, Winnipeg, Manitoba (Canada). Dept. of Physics and Astronomy
Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
Univ. of Maryland, College Park, MD (United States). Dept. of Chemistry and Biochemistry; Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
Univ. of Notre Dame, IN (United States). Dept. of Physics; Louisiana State Univ., Baton Rouge, LA (United States). Dept. of Physics and Astronomy
Univ. of Manitoba, Winnipeg, Manitoba (Canada). Dept. of Physics and Astronomy
Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division; McGill Univ., Montreal, QC (Canada). Dept of Physics

Beta-delayed neutron emission is being studied by detecting the particles and recoiling ions emerging from the Beta-decay Paul Trap. For decays to the ground state or γ-emitting states of the daughter nucleus, the fraction of recoiling ions which reach the ion detector in coincidence with a particle has been determined for ^{134, 135}Sb, ^{137, 138, 140}I, and ^{144, 145}Cs. This value is needed for the determination of the -delayed neutron emission branching ratio solely from the recoil-ion time-of-flight (TOF) spectrum. The β-particle energy and recoil-ion TOF spectra were used to constrain a simple decay model, which can be used to determine the detection efficiency. The method is compared to simulations to estimate the uncertainty introduced by incomplete knowledge of the decay pattern. By fitting the simulation results to several β-ion coincidence properties measured during the experiment, the fraction of ions which reach the microchannel plate detector can be determined to within ±4%. In conclusion, this result opens the possibility of using the recoil-ion TOF spectra for high precision β-delayed neutron branching-ratio measurements.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC52-07NA27344; NEUP 13-5485; NA0000979; FG02-94ER40834; AC02-06CH11357

OSTI ID:: 1466933

Alternate ID(s):: OSTI ID: 1542494

Report Number(s):: LLNL-JRNL-747550; 931403

Journal Information:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 898, Issue C; ISSN 0168-9002

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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References (24)

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