New measurement of the β-γ directional correlation in22Na
| Autor: | S. Q. Shang, J. C. Reich, Stuart J. Freedman, B. K. Fujikawa, A. O. Macchiavelli, R. W. MacLeod, E. G. Wasserman, C. J. Bowers, Paul Vetter |
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| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | Physical Review C. 59:1113-1118 |
| ISSN: | 1089-490X 0556-2813 |
| DOI: | 10.1103/physrevc.59.1113 |
| Popis: | We have measured the $\ensuremath{\beta}\ensuremath{-}\ensuremath{\gamma}$ directional correlation coefficient ${A}_{22}$ in the decay of ${}^{22}\mathrm{Na}$ to the ${2}^{+}$ 1275 keV excited state of ${}^{22}\mathrm{Ne}.$ We find ${A}_{22}=(5.3\ifmmode\pm\else\textpm\fi{}2.5)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}.$ This measurement has higher precision but disagrees with most previous experiments. The value for ${A}_{22},$ combined with other experimental inputs, gives recoil-order form factors in disagreement with theoretical estimates. This experiment demonstrates the capabilities of Gammasphere as an instrument for precise $\ensuremath{\beta}\ensuremath{-}\ensuremath{\gamma}$ correlation measurements. |
| Databáze: | OpenAIRE |
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