First two members of the Kπ=0− band in Ne20

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ID: 112361
1980
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Abstract
In an alpha capture experiment on an $^{16}\mathrm{O}$ gas target, the ${3}^{\ensuremath{-}}$, 7.156 MeV state in $^{20}\mathrm{Ne}$ has been observed to decay to the ${1}^{\ensuremath{-}}$, 5.782 MeV and the ${4}^{+}$, 4.248 MeV states with gamma ray branches of 45 \ifmmode\pm\else\textpm\fi{} 5% and 55 \ifmmode\pm\else\textpm\fi{} 5%, respectively. The strengths of the 1374 and 2908 keV transitions were deduced to be $B(E2)=51\ifmmode\pm\else\textpm\fi{}8$ W.u. and $B(E1)=79\ifmmode\pm\else\textpm\fi{}9$ \ensuremath{\mu} W.u., respectively. The strongly enhanced $E2$ rate for the ${3}^{\ensuremath{-}}$ to ${1}^{\ensuremath{-}}$ transition is convincing evidence for these two states being the first members of this ${K}^{\ensuremath{\pi}}={0}^{\ensuremath{-}}$ band in $^{20}\mathrm{Ne}$. From resonance scattering experiments, the alpha widths for these two states were determined to be 28 \ifmmode\pm\else\textpm\fi{} 3 eV and 8.1 \ifmmode\pm\else\textpm\fi{} 0.3 keV, respectively; values in agreement with cluster calculations of alpha widths in $^{20}\mathrm{Ne}$.NUCLEAR REACTIONS Measured $\ensuremath{\sigma}(E, \ensuremath{\theta})$ for $^{16}\mathrm{O}(\ensuremath{\alpha}, \ensuremath{\alpha})^{16}\mathrm{O}$ and $\ensuremath{\sigma}({E}_{R})$ for $^{16}\mathrm{O}(\ensuremath{\alpha}, \ensuremath{\gamma})^{20}\mathrm{Ne}$; deduced ${\ensuremath{\Gamma}}_{\ensuremath{\alpha}}$ for ${E}_{x}=5.782 \mathrm{and} 7.156$ MeV and radiative transition rates from ${E}_{x}=7.156$ MeV.
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macarthur1980physicalfirst Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors J. D. MacArthur;H. C. Evans;J. R. Leslie;H. -B. Mak;
Journal physical review c
Year 1980
DOI
doi:10.1103/PhysRevC.22.356
URL
https://doi.org/10.1103/physrevc.22.356
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