Interactions ofHe3Particles withBe9,C12,O16, andF19

Excitation functions for reactions induced by ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ particles in Be, C, O, and F were determined by irradiating thin foils of beryllium, Mylar, Teflon, and nylon with ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ ions of energies from 3 to 10 MeV. The radioactive products were assayed by gamma spectrometry, and their decay curves fitted by least-squares analysis. The maximum cross sections (and corresponding ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ energies) were ${}_{}{}^9{}_{}{}^{}\mathrm{Be}({}_{}{}^3{}_{}{}^{}\mathrm{He},n){}_{}{}^{11}{}_{}{}^{}\mathrm{C}$, 113±11 mb (4.3 MeV); ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^3{}_{}{}^{}\mathrm{He},n){}_{}{}^{14}{}_{}{}^{}\mathrm{O}$, 16.5±1.8 mb (6.3 MeV); ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^3{}_{}{}^{}\mathrm{He},d){}_{}{}^{13}{}_{}{}^{}\mathrm{N}$, 98.9±12.2 mb (9.5 MeV); ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}({}_{}{}^3{}_{}{}^{}\mathrm{He},\alpha ){}_{}{}^{11}{}_{}{}^{}\mathrm{C}$, 366±26 mb (8.2 MeV); ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}({}_{}{}^3{}_{}{}^{}\mathrm{He},p){}_{}{}^{18}{}_{}{}^{}\mathrm{F}$ 436±44 mb (6.3 MeV); ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}({}_{}{}^3{}_{}{}^{}\mathrm{He},\alpha ){}_{}{}^{15}{}_{}{}^{}\mathrm{O}$, 169±17 mb (6.6 MeV); ${}_{}{}^{19}{}_{}{}^{}\mathrm{F}({}_{}{}^3{}_{}{}^{}\mathrm{He},\alpha ){}_{}{}^{18}{}_{}{}^{}\mathrm{F}$, 22.1±2.0 mb (7.1 MeV); and