Resonance Neutron Capture in the Even-AIsotopes of Tungsten

The $\gamma$-ray spectra following neutron capture in the 4.14- and 21.2-eV resonances of ${\mathrm{W}}^{182}$ and the 18.8-eV resonance of ${\mathrm{W}}^{186}$ have been observed with a 6-cc Ge(Li) detector. Transitions corresponding to the ${\mathrm{W}}^{182}(n, \gamma ){\mathrm{W}}^{183}$ reaction have also been observed in the 115- and 250-eV resonances. In a special experiment, using a NaI detector, the absolute width of the ground-state transition for the 4.14-eV in resonance ${\mathrm{W}}^{182}$ was determined relative to the ground-state transition for the 7.62-eV resonance in ${\mathrm{W}}^{183}$.