Green Bank Telescope Observations of ${}^3\mathbf{H}{\mathbf{e}}^{+}$: Planetary Nebulae

T. M. Bania, Dana S. Balser

We use the Green Bank Telescope to search for ${}^{3}H{e}^{+}$ emission from a sample of four Galactic planetary nebulae: NGC 3242, NGC 6543, NGC 6826, and NGC 7009. During the era of prim…