
^{16}F (1971AJ02)(See Energy Level Diagrams for ^{16}F) GENERAL: See also Table 16.32 [Table of Energy Levels] (in PDF or PS). Mass of ^{16}F: From the Qvalue of the ^{14}N(^{3}He, n)^{16}F reaction [Q_{0} = 969 ± 14 keV (1965ZA01, 1968AD03)] and the (1965MA54) masses for ^{14}N, ^{3}He and n, the mass excess of ^{16}F is 10.693 ± 0.014 MeV. ^{16}F is then unstable with respect to proton emission by 0.544 MeV. The binding energies of a deuteron, a ^{3}He particle and an αparticle in ^{16}F are, respectively, 10.451, 9.584 and 9.074 MeV. (1966KE16) predict M  A = 11.204 from the isobaric multiplet mass equation [the difference between this value and the experimentally observed mass excess is due to a ThomasEhrman shift of the unbound ^{16}F ground state]. See also the general discussion in (1969GA1G) and (1964GA1C, 1966GA25).
Observed neutron groups are displayed in Table 16.33 (in PDF or PS) (1965ZA01, 1968AD03). Angular distributions of the neutrons corresponding to ^{16}F*(0, 0.43, 0.72) have been measured at E(^{3}He) = 3.5 MeV. The widths of the first four states of ^{16}F (see Table 16.33 (in PDF or PS)) [and comparison with the analog states in ^{16}N, ^{16}O] suggest that J^{π} for ^{16}F*(0, 0.24, 0.43, 0.71) are (0^{}, 2^{}, 1^{} and 3^{}, respectively) [see, however, reaction 3] (1965ZA01). See also (1960BO1B, 1964BR13).
At E_{p} = 30 and 50 MeV, neutron groups are reported to eight excited states of ^{16}F with E_{x} ≲ 19.5 MeV, including two states at E_{x} = 4.20 ± 0.05 and 6.16 ± 0.05 MeV (1965GR15). See also (1970WI1B).
Triton groups observed at E(^{3}He) = 40.2 MeV are displayed in Table 16.33 (in PDF or PS). The angular distributions of the tritons to ^{16}F*(0, 0.24) are similar, as are those of the tritons to ^{16}F*(0.43, 0.71): comparison with analog states in ^{16}N, ^{16}O then suggests J^{π} = 0^{}, 1^{}, 2^{} and 3^{}, respectively, for these states (1965PE04). See also (1966TO04; theor.) and (1965RI1C, 1967HA1Q).
