Information on mass chains and nuclides

3	4
5	6
7	8
9	10
11	12
13	14
15	16
17	18
19	20
Group Info
Publications
HTML
General Tables
Level Diagrams
Tables of EL's
NSR Key# Retrieval
ENSDF
Excitation Functions
Thermal N Capt.
G.S. Decays
Half-Lives Table
TUNL Dissertations
NuDat at BNL
Useful Links
Citation Examples
Home
Sitemap
Directory
Email Us

WWW TUNL

GENERAL: See also Table 16.32 [Table of Energy Levels] (in PDF or PS).

See (1966LE1H, 1967DI1B).

Mass of ¹⁶F: From the Q-value of the ¹⁴N(³He, n)¹⁶F reaction [Q₀ = -969 ± 14 keV (1965ZA01, 1968AD03)] and the (1965MA54) masses for ¹⁴N, ³He and n, the mass excess of ¹⁶F is 10.693 ± 0.014 MeV. ¹⁶F is then unstable with respect to proton emission by 0.544 MeV. The binding energies of a deuteron, a ³He particle and an α-particle in ¹⁶F 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 Thomas-Ehrman shift of the unbound ¹⁶F ground state]. See also the general discussion in (1969GA1G) and (1964GA1C, 1966GA25).

1. 14N(3He, n)16F	Qm = -0.969
	Q0 = -0.970 ± 0.015 (1968AD03);
	Q0 = -0.963 ± 0.040 (1965ZA01).

Observed neutron groups are displayed in Table 16.33 (in PDF or PS) (1965ZA01, 1968AD03). Angular distributions of the neutrons corresponding to ¹⁶F*(0, 0.43, 0.72) have been measured at E(³He) = 3.5 MeV. The widths of the first four states of ¹⁶F (see Table 16.33 (in PDF or PS)) [and comparison with the analog states in ¹⁶N, ¹⁶O] suggest that J^π for ¹⁶F*(0, 0.24, 0.43, 0.71) are (0^-, 2^-, 1^- and 3^-, respectively) [see, however, reaction 3] (1965ZA01). See also (1960BO1B, 1964BR13).

2. 16O(p, n)16F	Qm = -16.212
	Q0 = -16.4 ± 0.2 (1965GR15).

At E_p = 30 and 50 MeV, neutron groups are reported to eight excited states of ¹⁶F 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).

3. 16O(3He, t)16F

Qm = -15.448

Triton groups observed at E(³He) = 40.2 MeV are displayed in Table 16.33 (in PDF or PS). The angular distributions of the tritons to ¹⁶F*(0, 0.24) are similar, as are those of the tritons to ¹⁶F*(0.43, 0.71): comparison with analog states in ¹⁶N, ¹⁶O then suggests J^π = 0^-, 1^-, 2^- and 3^-, respectively, for these states (1965PE04). See also (1966TO04; theor.) and (1965RI1C, 1967HA1Q).