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Lifetime measurement of the 167.1 keV state in Ar-41

AuthorsWhite, E. R.; Mach, H.; Fraile, Luis M. ; Köster, U.; Arndt, O.; Blazhev, A.; Boelaert, N.; García Borge, María José ; Boutami, Rafik ; Bradley, H.; Braun, N.; Dlouhy, Z.; Fransen, C.; Fynbo, H. O. U.; Hinke, Ch.; Hoff, P.; Joinet, A.; Jokinen, A.; Jolie, J.; Korgul, A.; Kratz, K.-L.; Kröll, T.; Kurcewicz, W.; Nyberg, J.; Reillo, E-M.; Ruchowska, E.; Schwerdtfeger, W.; Simpson, G. S.; Stanoiu, M.; Tengblad, Olof ; Thirolf, P. G.; Ugryumov, V.; Walters, W. B.
Keywords[PACS] Lifetimes, widths
[PACS] β decay; double β decay; electron and muon capture
[PACS] Properties of specific nuclei listed by mass ranges: 39 ≤ A ≤ 58
Issue Date27-Nov-2007
PublisherAmerican Physical Society
CitationPhysical Review C 76(5): 057303 (2007)
AbstractThe Advanced-Time-Delayed method was used to measure lifetimes of the states in Ar-41 populated in the β decay of Cl-41. The nuclei Cl-41 were produced at ISOLDE by 1.4-GeV proton bombardment of a thick UCx target and mass-separated as molecular ions, XeCl+. Our measured half-life of the 167.1-keV state, T(1/2) = 315(15) ps, is significantly lower than the previously measured value of 410(30) ps. We have also determined T(1/2) = 260(80) ps and T(1/2) ≤ 46 ps for the 515.9- and 1867.7-keV states, respectively. These are the shortest lifetimes measured so far with the ultrafast timing method using the new LaBr3(Ce) crystals for γ-ray detection.
Description4 pages, 3 figures, 1 table.-- PACS nrs.: 21.10.Tg; 23.40.−s; 27.40.+z.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevC.76.057303
Appears in Collections:(CFMAC-IEM) Artículos
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