The ORNL analysis technique for extracting β-delayed multi-neutron branching ratios with BRIKEN

Rasco, Bertis C.; Brewer, Nathan T.; Yokoyama, R.; Grzywacz, R.; Rykaczewski, Krzysztof Piotr; Tolosa-Delgado, A.; Agramunt, J.; Taín, J. L.; Algora, A.; Hall, O.; Griffin, C.; Davinson, T.; Phong, V. H.; Liu, J.; Nishimura, S.; Kiss, G. G.; Nepal, N.; Estrade, A.

doi:10.1016/j.nima.2018.09.121

Title: The ORNL analysis technique for extracting $β$ -delayed multi-neutron branching ratios with BRIKEN

Journal Article · Wed Oct 03 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.2018.09.121· OSTI ID:1479755

Rasco, Bertis C. ^[1]; Brewer, Nathan T. ^[1]; Yokoyama, R. ^[2]; Grzywacz, R. ^[2];

^[3]; Tolosa-Delgado, A. ^[4]; Agramunt, J. ^[4]; Taín, J. L. ^[4]; Algora, A. ^[5]; Hall, O. ^[6]; Griffin, C. ^[6]; Davinson, T. ^[6]; Phong, V. H. ^[7]; Liu, J. ^[8]; Nishimura, S. ^[9]; Kiss, G. G. ^[10]; Nepal, N. ^[11]; Estrade, A. ^[11]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Univ. of Tennessee, Knoxville, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Instituto de Fisica Corpuscular (CSIC-Univ. de Valencia), Valencia (Spain)
Instituto de Fisica Corpuscular (CSIC-Univ. de Valencia), Valencia (Spain); Institute for Nuclear Research (MTA Atomki), Debrecen (Hungary)
Univ. of Edinburgh, Edinburgh (United Kingdom)
VNU Univ. of Science, Hanoi (Viet Nam); RIKEN Nishina Center, Saitama (Japan)
The Univ. of Hong Kong, Hong Kong (China); RIKEN Nishina Center, Saitama (Japan)
RIKEN Nishina Center, Saitama (Japan)
RIKEN Nishina Center, Saitama (Japan); MTA Atomki, Debrecen (Hungary)
Central Michigan Univ., Mount Pleasant, MI (United States)

Here, many choices are available in order to evaluate large radioactive decay networks. There are many parameters that influence the calculated -decay delayed single and multi-neutron emission branching fractions. We describe assumptions about the decay model, background, and other parameters and their influence on β-decay delayed multi-neutron emission analysis. An analysis technique, the ORNL BRIKEN analysis procedure, for determining -delayed multi-neutron branching ratios in β-neutron precursors produced by means of heavy-ion fragmentation is presented. The technique is based on estimating the initial activities of zero, one, and two neutrons occurring in coincidence with an ion-implant and β trigger. The technique allows one to extract β-delayed multi-neutron decay branching ratios measured with the ³He BRIKEN neutron counter. As an example, two analyses of the -neutron emitter ⁷⁷Cu based on different a priori assumptions are presented along with comparisons to literature values.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1479755

Journal Information:: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 911, Issue C; ISSN 0168-9002

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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References (11)

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Title: The ORNL analysis technique for extracting $β$ -delayed multi-neutron branching ratios with BRIKEN