Author: P. J. Coleman-smith

0000000000172556

AUTHOR

P. J. Coleman-smith

showing 6 related works from this author

The SAGE spectrometer: A tool for combined in-beam gamma-ray and conversion electron spectroscopy

2010

International audience; The sage spectrometer allows simultaneous in-beam -ray and internal conversion electron measurements, by combining a germanium detector array with a highly segmented silicon detector and an electron transport system. sage is coupled with the ritu gas- lled recoil separator and the great focal-plane spectrometer for recoil-decay tagging studies. Digital electronics are used both for the ray and the electron parts of the spectrometer. sage was commissioned in the Accelerator Laboratory of the University of Jyvaskyla in the beginning of 2010.

PhysicsHistorySpectrometer010308 nuclear & particles physicsbusiness.industryPhysics::Instrumentation and DetectorsElectron[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]7. Clean energy01 natural sciencesElectron spectroscopyRecoil separatorComputer Science ApplicationsEducationSemiconductor detectorNuclear physicsOpticsInternal conversion0103 physical sciencesSilicon detectorHigh Energy Physics::Experiment010306 general physicsbusinessNuclear ExperimentBeam (structure)

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Commissioning of the BRIKEN beta-delayed neutron detector for the study of exotic neutron-rich nuclei

2017

Beta-delayed neutron emission (Beta-n) is a form of radioactive decay in which an electron, an anti-neutrino and one or more neutrons are emitted. This process arises if the energy window of the decay Q_Beta is greater than the neutron separation energy S n of the daughter. The probability in each decay of emitting neutrons is called the Pn value. This form of decay plays a key role in the synthesis of chemical elements in the Universe via the rapid neutron capture process, or r-process. The r-process proceeds far from the valley of nuclear stability, and leads to very neutron-rich nuclei that then decay to the line of stability. Most of these nuclei are ßn emitters. The initial abundance d…

AstrofísicaNeutron emissionQC1-999Astrophysics::High Energy Astrophysical PhenomenaNeutron detectorNuclear TheoryElectronNeutronAstrophysics01 natural sciencesNuclear physics0103 physical sciencesNeutron detectionNeutron010306 general physicsNuclear ExperimentDelayed neutronsPhysics:Energies::Energia nuclear [Àrees temàtiques de la UPC]Neutrons:Física [Àrees temàtiques de la UPC]010308 nuclear & particles physicsPhysicsNuclear structureDetectorNeutron captureDelayed neutronRadioactive decay

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The BRIKEN Project: Extensive Measurements of $\beta $-delayed Neutron Emitters for the Astrophysical r Process

2018

An ambitious program to measure decay properties, primarily β-delayed neutron emission probabilities and half-lives, for a significant number of nuclei near or on the path of the rapid neutron capture process, has been launched at the RIKEN Nishina Center. We give here an overview of the status of the project.

AstrofísicaDelayed neutronNeutron emissionAstrophysics::High Energy Astrophysical PhenomenaNuclear dataNuclear TheoryMeasure (physics)General Physics and AstronomyNeutronAstrophysics01 natural sciencesNuclear physics0103 physical sciencesNeutronNuclear Experiment010306 general physics:Energies::Energia nuclear [Àrees temàtiques de la UPC]NeutronsPhysics:Física [Àrees temàtiques de la UPC]010308 nuclear & particles physicsNuclear dataNeutron capture:Física::Astronomia i astrofísica [Àrees temàtiques de la UPC]r-processDelayed neutronActa Physica Polonica B

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β-delayed neutron emission of r-process nuclei at the N = 82 shell closure

2021

This experiment was performed at RI Beam Factory operated by RIKEN Nishina Center and CNS, University of Tokyo. O.H, T.D, P.J.W, C.G.B, C.J.G and D.K would like to thank STFC, UK for support. This research was sponsored in part by the Office of Nuclear Physics, U.S. Department of Energy under Award No. DE-FG02-96ER40983 (UTK) and DEAC05-00OR22725 (ORNL), and by the National Nuclear Security Administration under the Stewardship Science Academic Alliances program through DOE Award No. DENA0002132. This work was supported by National Science Foundation under Grants No. PHY-1430152 (JINA Center for the Evolution of the Elements), No. PHY-1565546 (NSCL), and No. PHY-1714153 (Central Michigan Uni…

Nuclear and High Energy PhysicsNational securityQC1-999ß-delayedNuclear physicsLibrary scienceNeutrons--Capturaβ-delayed neutron emission7. Clean energy01 natural sciencesNeutrons--CaptureAstrophysical0103 physical sciencesEuropean commissionr-processimportant010306 general physicsChinaNuclear ExperimentNeutron emissionr-processPhysics:Física [Àrees temàtiques de la UPC]010308 nuclear & particles physicsbusiness.industryr-processPhysicsChinese academy of sciencesbeta-delayed neutron emissionResearch councilChristian ministryFísica nuclearNational laboratorybusinessAdministration (government)Physics Letters B

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Transmission Efficiency of the SAGE Spectrometer Using GEANT4

2013

The new SAGE spectrometer allows simultaneous electron and γ-ray in-beam studies of heavy nuclei. A comprehensive GEANT4 simulation suite has been created for the SAGE spectrometer. This includes both the silicon detectors for electron detection and the germanium detectors for γ-ray detection. The simulation can be used for a wide variety of tests with the aim of better understanding the behaviour of SAGE. A number of aspects of electron transmission are presented here.