  We used the VLA to search for 3He+ emission from two Galactic planetary
nebulae (PNe): NGC6572 and J320}. Standard stellar models predict that the
3He/H abundance ratios for PNe should be 1-2 orders of magnitude higher than
the primordial value (3He/H ~ 1e-5 by number) determined from Galactic HII
region abundances and confirmed by WMAP cosmic microwave background results.
Chemical evolution models suggest that fewer than 5% of all PNe enrich the
interstellar medium (ISM) with 3He at the level of standard stellar models. Our
target PNe are therefore anomalous in that they were selected from a sample
deliberately biased to contain objects with properties that maximized the
likelihood of a 3He detection by the VLA. We have detected the 8.665 GHz
hyperfine 3He+ transition in J320 at the 4 sigma level. The 3He/H abundance
ratio is 1.9e-3 with roughly a factor of two uncertainty. For NGC 6572 we find
an upper limit of 3He/H <= 1e-3. This detection of 3He in J320 makes it the
second PN known to have an anomalously high 3He abundance confirming that at
least some low-mass stars produce significant amounts of 3He that survives to
the PN stage and enriches the ISM.
