Commissioning of the BRIKEN detector for the measurement of very exotic beta-delayed neutron emitters
A. Tolosa-Delgado, J. Agramunt, J. L. Tain, A. Algora, C., Domingo-Pardo, A. I. Morales, B. Rubio, A. Tarifeno-Saldivia, F. Calvino, G., Cortes, N. T. Brewer, B. C. Rasco, K. P. Rykaczewski, D. W. Stracener, J. M., Allmond, R. Grzywacz, R. Yokoyama, M. Singh, T. King, M. Madurga
TL;DR
The paper details the commissioning and initial performance results of the BRIKEN detector system at RIKEN, designed for studying decay properties of neutron-rich nuclei, including half-lives and neutron emission probabilities.
Contribution
It introduces a new detection system for measuring properties of very neutron-rich nuclei and describes its commissioning and initial performance evaluation.
Findings
Successful measurement of half-lives and neutron emission probabilities
Effective correction of accidental neutron background
Demonstrated detector performance for exotic nuclei
Abstract
A new detection system has been installed at the RIKEN Nishina Center (Japan) to investigate decay properties of very neutron-rich nuclei. The setup consists of three main parts: a moderated neutron counter, a detection system sensitive to the implantation and decay of radioactive ions, and gamma-ray detectors. We describe here the setup, the commissioning experiment and some selected results demonstrating its performance for the measurement of half-lives and beta-delayed neutron emission probabilities. The methodology followed in the analysis of the data is described in detail. Particular emphasis is placed on the correction of the accidental neutron background.
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