(See Energy Level Diagrams for 17F)
Pion reactions: (1980CR03).
Ground state of 17F: (1983AD1B, 1983ANZQ, 1983AR1J, 1983AU1B, 1983BU07, 1983DE1X, 1983MA38, 1983TO08, 1983ZI1C, 1984BE11, 1984BO11, 1984BR25, 1984ZI04, 1985AN28, 1985AR11, 1985HA18, 1985ZI05, 1986WI03).
Q = 0.10 ± 0.02 b (1974MI21).
The half-life of 17F is 64.49 ± 0.16 sec; log ft = 3.358 ± 0.002. The log ft for the transition to 17O*(0.87) is > 5.6: see (1982AJ01). See also (1983GO2C, 1983RA29, 1985BR29) and (1981ME1H, 1982OS1C, 1984AR1D, 1984BE11; theor.).
Excitation functions for γ0+1, γ2 and γ3 have been studied for E(3He) ≈ 3 to 18 MeV. Resonances are reported corresponding to 17F states at 20.1 ± 0.2 (γ2) [Γ = 1.07 ± 0.16 MeV], 20.4 ± 0.1 (γ1) [0.7 ± 0.1] and 21.3 ± 0.1 MeV (γ1) [0.9 ± 0.1] (1983WA05): see Table 17.19 (in PDF or PS) in (1982AJ01). For neutron and charged-particle channels see reaction 6 in (1982AJ01).
Angular distributions (reaction (a)) have been measured at E(6Li) = 36 MeV involving 17F*(8.43, 10.7, 11.9, 13.51, 14.84). Comparisons are made with the results in the analog reaction (reaction 19) in 17O (1984ET01). [Comment: compare the experimental resolution with the density of states]. For the earlier work see (1982AJ01).
Angular distributions have been reported to most of the states of 17F with Ex < 8.1 MeV at E(3He) = 3.8 and 4.8 MeV. Neutron groups have also been reported to 17F states at Ex = 11.195 ± 0.007, 12.540 ± 0.010 and 13.059 MeV, with Γ < 20, < 25 and < 25 keV, respectively. Angular distributions at E(3He) = 10.36 and 11.88 MeV lead to Jπ = 1/2- for 17F*(11.20)[L = 0], 3/2- or 5/2- for 17F*(12.54) and (3/2-, 5/2-) for 17F*(13.06). These three states are probably the first three T = 3/2 states in 17F (1969AD02). The branching ratios for transitions to 16O*(0, 6.05, 6.13) for 17F*(11.20) and for the analog T = 3/2 state in 17O are displayed in Table 17.11 (in PDF or PS): the ratios of the reduced widths are quite different in the two mirror nuclei. See (1977AJ02) for references.
At low energies the direct capture to 17F*(0, 0.50) is observed. Extrapolation of cross-section data leads to S(0) ≈ 8 keV · b: see (1977AJ02). In addition to two T = 1/2 resonances, five resonances corresponding to T = 3/2 states are observed in the γ1 and γ0 + γ1 yields: see Table 17.18 (in PDF or PS) for the reported parameters. The lowest T = 3/2 states of even parity at Ex = 13.27 and 14.02 MeV [Jπ = (1/2+) and 5/2+] (see Table 17.19 (in PDF or PS)) are not observed here: Γγ ≤ 7 and ≤ 11.8 eV, respectively (1975HA06).
The (γ0 + γ1) yield at 90° has been studied for Ep = 15.75 to 31.66 MeV: it shows the giant dipole resonance centered at Ex = 22 MeV with a width of ≈ 5 MeV and a pigmy resonance centered at 17.5 MeV. The integrated strength of the, mainly T = 1/2, giant resonance is 10 MeV · mb: the observed strength distribution is in good agreement with odd parity 2p-1h, 1p excitation calculations. The pigmy resonance is due to f7/2 → d5/2. The main f7/2 strength lies in two states at Ex = 16.9 and 18.0 MeV (1975HA07). See also (1982AN1D, 1982BE29, 1983RA1G, 1984JEZY), (1982BA80, 1984BO1Q; astrophysics), (1985BL1B, 1986WE1D) and (1982DU1A, 1984PE02; theor.).
Yield curves for elastic protons, protons scattered to 16O*(6.05, 6.13, 6.92, 7.12, 8.87) and for γ-rays from 16O*(6.13, 6.92) have been studied at many energies up to Ep = 46 MeV: see (1971AJ02, 1977AJ02, 1982AJ01). The observed resonances are displayed in Table 17.19 (in PDF or PS). Absolute σ(θ) [θ = 110° to 160°] have been measured for Ep = 0.60 to 2.00 MeV to ± 5% (1983BR11). Cross sections for bremsstrahlung emission are reported in the vicinity of the Ep = 2.66 MeV resonance by (1983TRZZ). The cross sections of the 6.13 MeV γ-ray at Ep = 23.7 and 44.6 MeV have been measured by (1981NA14), and (1979SC07) report the σt for Ep = 190 to 558 MeV. See also (1982AJ01).
Ay measurements have beem recently reported at Epol. p = 35 MeV (1986OH1C; to 16O*(10.96, 12.80)), 65 MeV (1982SA19; p0), 65 MeV (1984HO17; to 16O*(10.96, 12.80)), 135 and 180 MeV (1983HYZZ; to 16O*(8.87)), 180 MeV (1983FIZW; to many states including 16O*(11.10)) and 200 MeV (1985GL01; p0). At Epol. p = 318 and 498 MeV (1983LOZW, 1986LO1D) have measured Ay and spin transfer observables for the p0, p2, p3 and p4 groups. Polarization transfer coefficients have been studied at Epol. p = 200 MeV to the 4- states 16O*(17.79, 19.81) [T = 0] and 16O*(18.98) [T = 1] (1985WIZW, 1986OL1A). The spin rotation parameter Q has been measured for the elastic scattering at Epol. p = 65 MeV by (1986SA1J), at 200 MeV by (1985STZW, 1986ST1G) [see (1986ST1F) for polarization transfer coefficients for 16O*(17.79, 18.98, 19.81)] and at 800 MeV by (1986FE01). See also (1986GL1G). For the earlier work see (1982AJ01).
For reaction (b) see (1982REZZ). For reaction (c) see (1983WA1C, 1984WA21). See also (1982REZZ). For fragmentation see (1985GU1A, 1985VDZX). See also 16O and (1982AU1A, 1982BE1A, 1982YA1A, 1983BE1A, 1984GE1A, 1984RE14) and (1981PI11, 1981SH1A, 1982CO17, 1982KO23, 1982NA13, 1982YA07, 1983BE1B, 1983KE1B, 1983KO1B, 1983SH05, 1984GO04, 1984HY01, 1984PH02, 1984PI05, 1984PI17, 1984WO12, 1985AU02, 1985DY03, 1985HY01, 1985KE1A, 1985KO37, 1986DE1G, 1986KU1D, 1986LO1A; theor.).
The excitation function for d0 (θ = 70°) has been measured for Ep = 21 to 38.5 MeV. A strong resonance is observed at Ep = 24 MeV: see Table 17.19 (in PDF or PS). The analyzing power has been measured for the d0 group at Epol. p = 65 MeV (1980HO18). See (1982AJ01) for the earlier work.
Parameters of the first excited state of 17F are Ex = 495.33 ± 0.10 keV, τm = 407 ± 9 psec: see (1971AJ02). See also Table 17.21 (in PDF or PS) in (1971AJ02). For polarization measurements see (1981LI23) and 18F in (1983AJ01). See also (1983CR1A).
At E(3He) = 18 MeV, angular distributions of the deuterons to 17F*(0, 0.50, 3104 ± 0.003, 3.857 ± 0.004) have been measured. The spectroscopic factors for 17F*(0, 0.50) are 0.94 and 0.83. Two-step processes appear to be involved in the excitation of 17F*(3.10, 3.86). Angular distributions have also been measured at E(3He) = 30 MeV (to 17F*(5.1, 5.7)) and at E(pol. 3He) = 33 MeV (d0, d1): see (1982AJ01) for references.
At Ep = 135.2 MeV differential cross sections are reported for the transitions to 17F*(0, 0.5 ± 0.05, 4.84 ± 0.1, 5.89 ± 0.2, 6.34 ± 0.2, 7.26 ± 0.2, 7.64 ± 0.2, 9.3 ± 0.1, 14.3 ± 0.1). [Note known density of states.] The group to 17F*(4.84) has Γ = 1.8 ± 0.05 MeV (1985PU1A). For a discussion of Gamow-Teller transition probabilites see (1985WA24). For Ay measurements see (1985PU1A, 1983PUZZ). For the earlier work see (1982AJ01).
Angular distributions have been studied at E(3He) = 17.3 MeV [t0, t1] and at E(pol. 3He) = 33 MeV [t0]: see (1982AJ01).