Excitation Energies of Bound States ofO17andB12

Abstract

The energy of the ${\mathrm{O}}^{17}$ 0.871-MeV gamma ray was measured with a lithium-drifted germanium detector using the ${\mathrm{O}}^{16}(d, p){\mathrm{O}}^{17}$ reaction to populate the first excited state of ${\mathrm{O}}^{17}$. A result of 870.81±0.22 keV was obtained using various radiactive sources for energy calibration. Using this line and various others for energy calibration, the energies of gamma rays from transitions in ${\mathrm{B}}^{12}$ were measured and excitation energies of 953.14±0.60 and 1673.65±0.60 keV were deduced for the first two excited states of ${\mathrm{B}}^{12}$. Strong but nonconclusive evidence is presented for an excitation energy of 2618.5±3.5 keV for the third excited state of ${\mathrm{B}}^{12}$.