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Sökning: WFRF:(Covello A.)

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1.
  • Mach, Henryk, et al. (författare)
  • The single-particle and collective features in the nuclei just above Sn-132
  • 2007
  • Ingår i: Acta Physica Polonica B. - 0587-4254 .- 1509-5770. ; 38:4, s. 1213-1218
  • Tidskriftsartikel (refereegranskat)abstract
    • The Advanced Time Delayed method has been used to measure the lifetimes of excited states in the exotic nuclei Sb-134, Sb-135 and Te-136 populated in the beta decay of Sn-134, Sn-135 and Sn-136, respectively. High purity Sn beams were extracted at the ISOLDE separator using a novel production technique utilizing the molecular SnS+ beams to isolate Sn from contaminating other fission products. Among the new results we have identified the 1/2(+) state in Sb-135 and its E2 transition to the lower-lying 5/2(+) state was found to be surprisingly collective. This measurement represents also one of the first applications of the LaBr3 scintillator to ultra fast timing.
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2.
  • Mach, Henryk, et al. (författare)
  • Ultrafast-timing lifetime measurements in Ru-94 and Pd-96 : Breakdown of the seniority scheme in N=50 isotones
  • 2017
  • Ingår i: PHYSICAL REVIEW C. - : American Physical Society. - 2469-9985. ; 95:1
  • Tidskriftsartikel (refereegranskat)abstract
    • The advanced time-delayed gamma gamma(t) method has been applied to determine half-lives of low-lying states in the N = 50 isotones Ru-94 and Pd-96. The inferred experimental E2 strengths for the 4(+) -> 2(+) transitions in the two nuclei show a dramatic deviation with respect to the shell model predictions in the (f(5/2), p, g(9/2)) proton hole space in Sn-100. The anomalous behavior can be ascribed to a breakdown of the seniority quantum number in the pi g(9/2)(n) configuration due to particle-hole excitations across the N = Z = 50 shell as confirmed by large-scale shell model calculations.
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5.
  • Sanchez-Vega, Maria, et al. (författare)
  • Single-proton and core-coupled states in Sb-133
  • 1999
  • Ingår i: Phys. Rev. C. ; 60:024303
  • Tidskriftsartikel (refereegranskat)abstract
    • The low-energy structure of the Z=51, N=82 nuclide Sb-133 has been studied through a high-sensitivity investigation of the beta(-) decay of Sn-133. As a result, more than 70 new excited states have been observed and about 100 gamma-ray transitions have be
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  • Resultat 1-5 av 5

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