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- W1663164089 abstract "Gamow-Teller (${1}^{+}$) strength was studied in $^{38}mathrm{K}$ with the analog reactions $^{38}mathrm{Ar}$(p,n${)}^{38}$K and $^{38}mathrm{Ca}$(${mathrm{ensuremath{beta}}}^{+}$${)}^{38}$K. The (p,n) reaction was performed at 135 MeV using the beam swinger facility at the Indiana University Cyclotron Facility. Excitation-energy spectra were measured at 15 angles between 0ifmmode^circelsetextdegreefi{} and 63ifmmode^circelsetextdegreefi{}. Neutron energies were measured by the time-of-flight method using a large-volume plastic scintillator array at a flight path of 131.0 m. The overall energy resolution was 280 keV. Gamow-Teller (GT) strength was extracted from the measured angular distributions to discrete ${1}^{+}$ final states. The ensuremath{beta}-decay experiment was performed with the ISOLDE on-line mass separator facility at CERN. The ensuremath{beta}-decay branching ratios were determined by observing the delayed ensuremath{gamma} decays of $^{38}mathrm{K}$. These decay measurements provide an increased sensitivity over earlier measurements and are able to extract transitions down to ensuremath{sim} ${10}^{mathrm{ensuremath{-}}4}$ of the strongest branches. The B(GT) values obtained from the two experiments are generally in good agreement, except for the transition to the first ${1}^{+}$ state at 0.46 MeV, which is observed to be much weaker in the (p,n) measurements. The ensuremath{beta}-decay measurements provide good resolution and high sensitivity while the (p,n) measurements extend the ensuremath{beta}-decay measurements to higher excitation energies. The summed B(GT) strength is ensuremath{sim}50% of the simple Ikeda sum rule. The distribution of GT strength is in reasonable agreement with that predicted from a shell-model calculation using ``effective'' GT operators. textcopyright{} 1996 The American Physical Society." @default.
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- W1663164089 date "1996-08-01" @default.
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- W1663164089 title "Gamow-Teller strength toK38from theAr38(p,n) reaction andCa38(β+) decay" @default.
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- W1663164089 doi "https://doi.org/10.1103/physrevc.54.602" @default.
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