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dc.contributor.authorMallaburn, M.J.
dc.contributor.authorSingh, B.S. Nara
dc.contributor.authorCullen, D. M.
dc.contributor.authorHodge, D.
dc.contributor.authorTaylor, M.J.
dc.contributor.authorGiles, M.M.
dc.contributor.authorBarber, L.
dc.contributor.authorNiţă, C.R.
dc.contributor.authorMihai, R.E.
dc.contributor.authorMihai, C.
dc.contributor.authorMărginean, R.
dc.contributor.authorMărginean, N.
dc.contributor.authorNobs, C.R.
dc.contributor.authorGamba, E.R.
dc.contributor.authorBruce, A.M.
dc.contributor.authorScholey, Catherine
dc.contributor.authorRahkila, Panu
dc.contributor.authorGreenlees, Paul
dc.contributor.authorBadran, Hussam
dc.contributor.authorGrahn, Tuomas
dc.contributor.authorNeuvonen, O.
dc.contributor.authorAuranen, Kalle
dc.contributor.authorBisso, F.
dc.contributor.authorCox, Daniel
dc.contributor.authorHerzan, Andrej
dc.contributor.authorJulin, Rauno
dc.contributor.authorKonki, Joonas
dc.contributor.authorLightfoot, A.K.
dc.contributor.authorPakarinen, Janne
dc.contributor.authorPapadakis, P.
dc.contributor.authorPartanen, Jari
dc.contributor.authorSandzelius, Mikael
dc.contributor.authorSarén, Jan
dc.contributor.authorSorri, Juha
dc.contributor.authorStolze, Sanna
dc.contributor.authorUusitalo, Juha
dc.contributor.authorRegan, P.H.
dc.contributor.authorPodolyák, Zs.
dc.contributor.authorLalkovski, S.
dc.contributor.authorSmith, J.F.
dc.contributor.authorSmolen, M.
dc.identifier.citationMallaburn, M. J., Singh, B. S. N., Cullen, D. M., Hodge, D., Taylor, M. J., Giles, M. M., . . . Smolen, M. (2019). A time-of-flight correction procedure for fast-timing data of recoils with varying implantation positions at a spectrometer focal plane. <em>Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment</em>, 933, 18-29. <a href="">doi:10.1016/j.nima.2019.04.019</a>fi
dc.description.abstractFast-timing measurements at the focal plane of a separator can suffer from poor timing resolution. This is due to the variations in time-of-flight (ToF) for photons travelling to a given detector, which arise from the changes in the implantation positions of the recoil nuclei emitting the γ rays of interest. In order to minimise these effects on timing measurements, a procedure is presented that improves fast-timing data by performing ToF corrections on an event-by-event basis. This method was used to correct data collected with an array of eight LaBr3 detectors, which detected γ rays from spatially distributed 138Gd recoil-implants at the focal plane of the Recoil-Ion-Transport-Unit (RITU) spectrometer. The Generalised Centroid Difference (GCD) method was used to extract a lifetime from data in conjunction with a new procedure to calibrate the time walk. The lifetime of the first 2+ state in 138Gd, populated by the decay of the Kπ = 8− isomeric state, was measured to be 229(24) ps using the ToF-corrected data, which is consistent within three standard deviations to the literature value. The results together with Monte-Carlo simulations show that the ToF correction procedure reduced the uncertainty in the measured lifetimes by 3 % in the case of the spatially distributed nuclei at the focal plane of RITU. However, ∼12 % has been estimated for a similar experiment when using a larger focal plane i.e. the Super-FRS at the FAIR
dc.publisherElsevier; North-Holland
dc.relation.ispartofseriesNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
dc.rightsCC BY 4.0
dc.subject.othernuclear-state lifetimesfi
dc.subject.otherdistributed sourcefi
dc.subject.othergeneralised-centroid-difference methodfi
dc.titleA time-of-flight correction procedure for fast-timing data of recoils with varying implantation positions at a spectrometer focal planefi
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.rights.copyright© 2019 The Authors. Published by Elsevier B.V.

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