## The ORNL Analysis Technique for Extracting $β$-Delayed Multi-Neutron Branching Ratios with BRIKEN

Research output: Contribution to journalArticle

• B. C. Rasco
• N. T. Brewer
• R. Yokoyama
• R. Grzywacz
• K. P. Rykaczewski
• J. Agramunt
• J. L. Tain
• A. Algora
• O. Hall
• C. Griffin
• T. Davinson
• V. H. Phong
• J. Liu
• S. Nishimura
• G. G. Kiss
• N. Nepal

### Related Edinburgh Organisations

Original language English 21 Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 3 Oct 2018 https://doi.org/10.1016/j.nima.2018.09.121 Published - 11 Dec 2018

### Abstract

Many choices are available in order to evaluate large radioactive decay networks. %multi-particle decay data. There are many parameters that influence the calculated $\beta$-decay delayed single and multi-neutron emission branching fractions. We describe assumptions about the decay model, background, and other parameters and their influence on $\beta$-decay delayed multi-neutron emission analysis. An analysis technique, the ORNL BRIKEN analysis procedure, for determining $\beta$-delayed multi-neutron branching ratios in $\beta$-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 $\beta$ trigger. The technique allows one to extract $\beta$-delayed multi-neutron decay branching ratios measured with the hybrid \textsuperscript{3}He BRIKEN neutron counter. As an example, two analyses of the $\beta$-neutron emitter \textsuperscript{77}Cu based on different {\it a priori} assumptions are presented along with comparisons to literature values.

### Research areas

• physics.ins-det, nucl-ex

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