0000000000608637
AUTHOR
R. Collatz
Total absorption spectroscopy of 58Cu decay
The β decay of 58Cu has been studied by means of total absorption γ-ray spectroscopy. The β feeding to the 58Ni states has been measured, and the strength of the 58Cu(1+) →58Ni(0+) Gamow-Teller transition has been determined with improved accuracy.
Fine structure of the Gamow-Teller resonance revealed in the decay of150Ho2−isomer
The $\ensuremath{\gamma}$ rays following the $72s$ ${}^{150}\mathrm{Ho}$ ${2}^{\ensuremath{-}}$ Gamow-Teller $\ensuremath{\beta}$ decay have been investigated with the CLUSTER CUBE setup, an array of six EUROBALL CLUSTER Ge detectors in close cubic geometry, providing a $\ensuremath{\gamma}$ ray detection sensitivity of $2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}5}$ per $\ensuremath{\beta}$-parent decay for $\ensuremath{\gamma}$-ray energies up to 5 MeV. The fine structure of the Gamow-Teller resonance at 4.4-MeV excitation in ${}^{150}\mathrm{Dy}$ has been studied. The resolved levels are compared with Shell Model predictions.
β-decay study of150Er,152Yb, and156Yb: Candidates for a monoenergetic neutrino beam facility
The beta decays of ^{150}Er, ^{152}Yb, and ^{156}Yb nuclei are investigated using the total absorption spectroscopy technique. These nuclei can be considered possible candidates for forming the beam of a monoenergetic neutrino beam facility based on the electron capture (EC) decay of radioactive nuclei. Our measurements confirm that for the cases studied, the EC decay proceeds mainly to a single state in the daughter nucleus.
Polarization in fragmentation,gfactor of35K
Spin polarization $Pg1%$ has been observed for ${}^{37}\mathrm{K}$ fragments produced in the reaction ${}^{40}\mathrm{Ca}{+}^{9}\mathrm{Be}$ at 500 MeV/nucleon. The polarization was measured as a function of fragment longitudinal momentum (Goldhaber distribution). The experimental results are well described by a new Monte Carlo\char21{}based model. The $\ensuremath{\beta}$-decay half-life of ${}^{35}\mathrm{K}$ was remeasured as ${t}_{1/2}=178(8)$ ms. Using polarized ${}^{35}\mathrm{K}$ fragments, the $g$ factor ${g}_{\mathrm{exp}}{(}^{35}\mathrm{K})=0.24(2)$ was measured. The magnetic moments of isospin $|{T}_{z}|=3/2$ mirror pairs are discussed.