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Lifetime measurement of the 167.1 keV state in 41Ar

Abstract : The Advanced-Time-Delayed method was used to measure lifetimes of the states in 41Ar populated in the beta decay of 41Cl. The nuclei 41Cl 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, T1/2=315(15) ps, is significantly lower than the previously measured value of 410(30) ps. We have also determined T1/2=260(80) ps and T1/2<=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 gamma-ray detection.
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Submitted on : Thursday, February 19, 2009 - 3:28:28 PM
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E. R. White, H. Mach, L.M. Fraile, U. Köster, O. Arndt, et al.. Lifetime measurement of the 167.1 keV state in 41Ar. Physical Review C, American Physical Society, 2007, 76, pp.057303. ⟨10.1103/PhysRevC.76.057303⟩. ⟨in2p3-00362851⟩



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