13-17 June 2016
Niigata University (Ikarashi Campus)
Asia/Tokyo timezone

β-decay studies of r-process nuclei using the Advanced Implantation Detector Array (AIDA)

15 Jun 2016, 14:30
10m
Library Hall, Central Library (Niigata University (Ikarashi Campus))

Library Hall, Central Library

Niigata University (Ikarashi Campus)

Central Library, Niigata University (Ikarashi Campus), 8050 Ikarashi 2-nocho, Nishi-ku Niigata City, 950-2181, Japan
Short Talk Students1

Speaker

Mr Chris Griffin (University of Edinburgh)

Description

The origin of the heavy elements is one of the most fundamental open questions in modern astrophysics, with a notable difficulty being the lack of a complete description of the rapid neutron-capture process (r-process) [1]. Two key quantities used in r-process calculations are β-decay half-lives and β-delayed neutron emission probabilities. The half-lives determine the timescale for the flow of matter to heavy isotopes. Isotopes near neutron shell closures, which are closer to stability and have longer half-lives, act as waiting points resulting in the observed r-process abundance peaks. As r-process nuclei then β-decay towards stability, β-delayed neutron emission shapes the final abundance curve. The Advanced Implantation Detector Array (AIDA) represents the latest generation of silicon implantation detectors for use in β-decay half-life and β-delayed neutron emission measurements at fragmentation beam facilities. Thanks to the large yields of neutron-rich isotopes available at the Radioactive Ion Beam Factory (RIBF), AIDA will soon be used to conduct studies of r-process nuclei in the mass region of uranium fission fragments. These studies will utilise both the BRIKEN neutron detector and the EURICA γ-ray spectrometer at RIBF, RIKEN. We present data from commissioning experiments and discuss plans for future measurements. [1] Y.Z. Qian, Prog. Part. Nucl. Phys. 50, 153 (2003).

Primary author

Mr Chris Griffin (University of Edinburgh)

Co-authors

Dr Alfredo Estrade (University of Edinburgh) Dr Thomas Davinson (University of Edinburgh)

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