Long-Lived Isomer ofAl26

Long-lived ${\mathrm{Al}}^{26}$ has been chemically purified from aluminum targets used in the 86-in. cyclotron. The main decay observed is through a 1.30±0.15 Mev positron in coincidence with a 1.82-Mev gamma ray. In addition, gamma rays of 0.717 Mev and 2.91 Mev have been found.