Oxygen-14 Beam Production at 5 and 15 MeV/u with MARS Spectrometer

Oxygen-14 (¹⁴O) is a rare isotope beam of interest for many groups studying the structure of proton-rich nuclei. At the Cyclotron Institute of Texas A&M University, there were two groups interested in studies with ¹⁴O. The Center for Exotic Nuclear Studies at the Institute of Basic Science in South Korea requested an ¹⁴O beam at 5 MeV/u and a group from Washington University in St. Louis has requested an ¹⁴O beam at 15 MeV/u. The ¹⁴O beams were produced and separated with the Momentum Achromat Recoil Separator (MARS). The LISE++ spectrometer simulator, designed to predict the intensity and purity of rare isotope beams, provided useful projections of particle production through the MARS beam line with nitrogen-14 as the accelerated projectile and hydrogen-1 gas as the target (to cause ¹⁴O production). Using these predictions, production tests for ¹⁴O beams at the two energies requested have been conducted. In this presentation, the experimental results of these production tests will be compared with the predictions of the LISE++ simulations of the MARS beam line.