A system to measure isomeric state half-lives in the 10 ns to 10 μs range

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dc.contributor.authorToufen D.L.
dc.contributor.authorAllegro P.R.P.
dc.contributor.authorMedina N.H.
dc.contributor.authorOliveira J.R.B.
dc.contributor.authorCybulska E.W.
dc.contributor.authorSeale W.A.
dc.contributor.authorLinares R.
dc.contributor.authorSilveira M.A.G.
dc.contributor.authorRibas R.V.
dc.date.accessioned2019-08-19T23:47:19Z
dc.date.available2019-08-19T23:47:19Z
dc.date.issued2014
dc.description.abstractThe Isomeric State Measurement System (SISMEI) was developed to search for isomeric nuclear states produced by fusion-evaporation reactions. The SISMEI consists of 10 plastic phoswich telescopes, two lead shields, one NaI(Tl) scintillation detector, two Compton suppressed HPGe γ-ray detectors, and a cone with a recoil product catcher. The new system was tested at the 8 UD Pelletron tandem accelerator of the University of São Paulo with the measurement of two known isomeric states: 54Fe, 10+ state (E = 6527.1 (11) keV, T1/2 = 364(7) ns) and the 5/2+ state of 19F (E = 197.143 (4) keV, T1/2 = 89.3 (10) ns). The results indicate that the system is capable of identifying delayed transitions, of measuring isomeric state lifetimes, and of identifying the feeding transitions of the isomeric state through the delayed γ-γ coincidence method. The measured half-life for the 10+ state was T1/2 = 365(14) ns and for the 5/2+ state, 100(36) ns. © 2014 AIP Publishing LLC.
dc.description.firstpage073501
dc.description.issuenumber7
dc.description.volume85
dc.identifier.citationToufen, D.L.; ALLEGRO, P.R.P.; Medina, N.H.; Oliveira, J.R.B.; Ribas, R V; Cybulska, E W; Seale, W A; LINARES, R.; SILVEIRA, M. A. G.. A system to measure isomeric states half-lives in the 10 ns to 10 μs range. Review of Scientific Instruments, v. 85, n. 7, p. 073501, 2014.
dc.identifier.doi10.1063/1.4886814
dc.identifier.issn1089-7623
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/1456
dc.relation.ispartofReview of Scientific Instruments
dc.rightsAcesso Restrito
dc.titleA system to measure isomeric state half-lives in the 10 ns to 10 μs range
dc.typeArtigo
fei.scopus.citations1
fei.scopus.eid2-s2.0-84904280339
fei.scopus.subjectCOMPTON
fei.scopus.subjectFusion-evaporation reactions
fei.scopus.subjectHalf lives
fei.scopus.subjectIsomeric nuclear state
fei.scopus.subjectIsomeric state
fei.scopus.subjectPelletron
fei.scopus.subjectPhoswich
fei.scopus.subjectTandem accelerators
fei.scopus.updated2024-11-01
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84904280339&origin=inward
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