
^{19}F (1995TI07)(See Energy Level Diagrams for ^{19}F) GENERAL: See 3 [Electromagnetic Transitions in A = 1819] (in PDF or PS), 19.8 [General Table] (in PDF or PS), 19.9 [Table of Energy Levels] (in PDF or PS) and 19.10 [Radiative decays in ^{19}Ne] (in PDF or PS).
μ_{g.s.} = +2.628866 (8) nm (1978LEZA) μ_{0.197} = +3.607 (8) nm (1978LEZA) Q_{0.197} = 0.12 ± 0.02 b (1978LEZA)
Mass distribution from the sequential decay of the compound nuclei formed from ^{10}B + ^{9}Be and ^{10}B + ^{10}B at E_{lab}/A = 11 MeV were measured by (1993SZ02). It was determined that the hot composite systems as light as ^{19}F and ^{20}Ne can behave like liquid droplets with no remnant shell effects.
Vector analyzing power measurements for the elastic scattering have been reported at E(^{7}Li) = 21.1 MeV (1984MO06). Fusion cross sections have been measured by (1982DE30). For other channels in the interaction of ^{12}C + ^{7}Li see (1978AJ03, 1983AJ01, 1987AJ02) for earlier work. More recently, neutron yield spectra for 40 MeV ^{7}Li on ^{12}C were measured by (1987SC11). The ^{12}C(^{7}Li, ^{7}Be)^{12}B reaction was studied at projectile energies of 14, 21, and 26 MeV/A by (1990NA24). Measurements and analysis of elastic breakup of 54 MeV ^{7}Li on ^{12}C are discussed in (1992GA03). See also the coupledchannels investigation of the effects of projectile breakup and target excitations in the scattering of polarized ^{7}Li by ^{12}C at E_{lab} = 21 MeV by (1988SA10). An evaluation of hypernuclear production crosssection by projectile fragmentation in ^{7}Li + ^{12}C at 3.0 GeV/A is presented in (1989BA92).
For excitation curves and angular distributions involving unresolved states and ^{19}F*(2.78) see (1983AJ01, 1987AJ02).
States in ^{19}F with 4.3 < E_{x} < 11.0 MeV were observed in reaction (a) by (1989PR01) and are displayed in 19.12 (in PDF or PS). For reaction (b) see (1983AJ01, 1987AJ02). See also (1988MA07).
Uncorrelated structures have been observed in the excitation functions for reactions (a) and (b). Angular distributions have been measured for reaction (d) at E(^{6}Li) = 28 MeV (1988SM01). See also ^{18}O in the present review and see ^{13}C and ^{15}N in (1991AJ01). Fusion cross sections have also been measured.
Cross sections were measured for E(^{10}B) = 17.16  31.32 MeV at θ_{lab} = 14.3°  41.6° (1988MA07). Several excited states in ^{19}F were studied. A fluctuation and resonance analysis was carried out.
See (1983AJ01).
See (1987AJ02).
Resonances in the yield of γrays are observed below E_{α} = 8.1 MeV (E_{x} = 10.4 MeV): the parameters for these are displayed in 19.13 (in PDF or PS). Branching ratios are shown in 19.10 (in PDF or PS) and τ_{m} measurements in 19.11 (in PDF or PS). The J^{π} values shown in 19.13 (in PDF or PS) are based on correlation and angular distribution measurements and on branching ratio determinations. In work reported since the previous review (1987AJ02), measurements were made by (1987MA31) for the resonance at E_{x} = 4.550 or 4.556 MeV. Widths of nine states between E_{x} = 8.288 and 10.411 MeV were measured by (1988HE03). These new results are included in 19.13 (in PDF or PS). See also the study by (1989GA06) of the T = 3/2 levels at E_{x} = 7.538, 7.660, 9.927 MeV. The discussion in (1987AJ02) notes that the ^{19}F levels involved in cascade decay are at E_{x} = 3999.6 ± 1.2, 4031.9 ± 0.4, 4377 ± 1 and 4548 ± 2 keV. The K^{π} = 1/2^{} band involves ^{19}F*(0.110[1/2^{}], 1.46[3/2^{}], 1.35[5/2^{}], 4.00[7/2^{}], 4.03[9/2^{}], 7.16[11/2^{}]) and possibly ^{19}F*(8.29)[13/2^{}] [J^{π} in brackets]. See, however, reaction 11. See (1972AJ02) for a discussion of the evidence for other assignments of J^{π} and K^{π}. ^{19}F*(10.41) is likely to be the second 13/2^{+} (2s, 1d)^{3} state in ^{19}F. For references see (1983AJ01). See also the comment (1985DI16) and reply (1985MO20) on negativeparity alpha cluster states in ^{19}F.
Resonances observed in the (α, α'γ) and (α, pγ) reactions and in the elastic scattering are displayed in 19.14 (in PDF or PS). See also (1985OH04). In work reported since the previous review (1987AJ02), nine states in ^{19}F between E_{x} = 8.288 and 10.411 MeV were studied by (1988HE03). Alpha widths were measured. T = 3/2 levels at E_{x} = 7.538, 7.660 and 9.927 MeV were studied by (1989GA06). These results are included in 19.14 (in PDF or PS). In related work, optical potentials for ^{15}N + α were extracted for E_{α} = 0  150 MeV (1993AB02) and alpha particle strength functions were obtained from resonance parameters by (1988LE05). See also the tables of thermonuclear reaction rates (1985CA41, 1988CA26). Cross sections for α scattering on light nuclei for ion beam analysis are presented in (1991LE33).
At E(^{6}Li) = 22 MeV angular distributions are reported to ^{19}F*(0.11, 1.35[u], 1.46, 4.0[u], 8.29[u]). Comparisons are made with the results from the ^{16}O(^{6}Li, d)^{20}Ne reaction, in an attempt to determine whether ^{19}F*(8.95) is the 11/2^{} member of the K^{π} = 1/2^{} band, of which ^{19}F*(8.29) is the 13/2^{} member (1984MO08, 1985DI16, 1985MO20). Configuration mixing appears to be involved in the 11/2^{} states [^{19}F*(7.17, 8.95, 9.87)] and in the 7/2^{} states [^{19}F*(4.00, 5.42)] to which they decay (1987FO03).
This reaction has been studied at E(^{7}Li) = 40 MeV: see 19.11 (in PDF or PS) in (1983AJ01).
See (1983AJ01).
Groups are reported at E(^{13}C) = 105 MeV leading to states which are generally unresolved; J^{π} assignments are suggested: see (1983AJ01).
For reaction (a) see (1978AJ03). The excitation function for reaction (b) has been measured for E_{t} = 0.3 to 3.7 MeV: there is evidence for a maximum at E_{t} = 2.5 MeV. For resonances in the yields of p_{0}, p_{1}, α_{0}, α_{1+2} see (1978AJ03). The elastic yield [reaction (d)] shows a large number of resonances; their parameters are displayed in 19.15 (in PDF or PS). See also (1987AJ02). More recently, double differential neutron yields for reaction (b) at E_{x} = 20 MeV were reported in (1993DR03, 1993DR04). An analysis of reaction (d) by a quasiresonatinggroup method is described in (1987ZH13). A study of the isospin dependence of the A = 3 isospin potential using reaction (d) for E_{x} = 33 MeV is discussed in (1987EN06). See also (1986AI04).
The use of reaction (a) in an ^{18}F production technique with natural water is described in (1991SU17). An ion beam technique for oxygen analysis using reaction (b) is discussed in (1992CO08).
Angular distributions have been measured at E_{α} = 20.1 to 40 MeV: see (1978AJ03, 1983AJ01, 1987AJ02). States observed in this reaction are displayed in 19.12 (in PDF or PS) of (1978AJ03). See also the shellmodel study of nuclear form factors in (1987LE15). An application of a perturbed angular correlation measurement to the study of high temperature superconducting oxides is described in (1990KOZG).
This reaction (and its mirror reaction ^{16}O(^{6}Li, t)^{19}Ne [see ^{19}Ne, reaction 5]) have been studied at E(^{6}Li) = 24 and 46 MeV: see (1978AJ03, 1983AJ01). Members of the K^{π} = 1/2^{+} and 1/2^{} rotational bands have been identified: see 19.16 (in PDF or PS). Other groups, mainly to unresolved states, have also been observed. A recent measurement to determine the structure of ^{19}F between E_{x} = 5.5  7.5 MeV was reported in (1992ROZZ).
Many states have been populated in this reaction: see 19.14 (in PDF or PS) in (1978AJ03) and (1984MO28; E(^{7}Li) = 20 MeV). Angular distributions in the latter work have been analyzed via HauserFeshbach compound nucleus calculations and FRDWBA. The K^{π} = 1/2^{+} and 1/2^{} states [see 19.16 (in PDF or PS)] are discussed in (1984MO28). More recently a discussion of the theory of clusterstripping reactions was presented in (1990OS03). Differential cross sections were calculated with the exact finiterange distorted wave Born approximation (1991OS04).
See reaction 6 in ^{19}Ne. See also (1983AJ01).
See (1978AJ03).
For early polarization measurements see (1983AJ01). More recently differential cross sections and analyzing powers were measured for E_{d} = 89 MeV (1990SA27). See ^{16}O, reaction 67 in (1993TI07). For other channels see (1978AJ03).
States studied in this reaction at E(^{3}He) = 18 MeV are displayed in 19.14 (in PDF or PS) of (1983AJ01). A study involving states with E_{x} ≤ 7 MeV was reported by (1986SE08).
At E_{α} = 47.5 MeV angular distributions have been studied for deuterons leading to the 1/2^{+}, 5/2^{+}, 3/2^{+}, 9/2^{+}, 13/2^{+} and 7/2^{+} members of the K = 1/2^{+} band [^{19}F*(0, 0.197, 1.55, 2.78, 4.65, 5.47)], to two 11/2^{+} states ^{19}F*(6.49, 7.94) [both of which are strongly populated] and to the 7/2^{+} state at 4.38 MeV. The reaction populates strongly only those positiveparity states that are predominantly (sd)^{3}: see (1983AJ01).
This reaction was studied for E_{p} = 80 to 2200 keV by (1980WI17). A large number of resonances have been investigated and E_{res}, total and partial widths, branching and mixing ratios and ωγ values are reported. Transition strength arguments as well as analyses of γray angular distribution data lead to J^{π} assignments: see 19.10 (in PDF or PS), 19.17 (in PDF or PS), and 19.18 (in PDF or PS) for a display of the results. More recently measurements were made for E_{p} < 0.22 MeV by (1990VO06), and the results are included in 19.18 (in PDF or PS). Absolute cross sections measured for direct capture lead to C^{2}S values for a number of states of ^{19}F. Reduced widths and J^{π} determinations led (1980WI17) to postulate ^{19}F*(3.91, 4.55, 4.38, 6.59, 6.50, 10.43) as the J^{π} = 3/2^{+}, 5/2^{+}, 7/2^{+}, 9/2^{+}, 11/2^{+}, 13/2^{+} states of the K^{π} = 3/2^{+} rotational band; ^{19}F*(7.70 or 7.26, 6.09, 9.82, 6.93, 9.87) as the J^{π} = 1/2^{}, 3/2^{}, 5/2^{}, 7/2^{} and 11/2^{} members of the excited K^{π} = 1/2^{} rotational band; and ^{19}F*(4.56, 4.68, 5.42, 6.10, 7.17) as the J^{π} = 3/2^{}, 5/2^{}, 7/2^{}, 9/2^{} and 11/2^{} members of the K^{π} = 3/2^{} rotational band. Evidence suggesting the presence of isospin mixing in the 5/2^{+}, first T = 3/2 state in ^{19}F at 7.54 MeV has been pointed out (1980WI17). See also 19.9 (in PDF or PS). Stellar reaction rates have also been calculated: the data cover T_{9} = 0.01  5.0. The consequences for the final termination of the CNO tricycle are discussed by (1980WI17). See also (1987AJ02). See also the more recent tables of thermonuclear reaction rates in (1983HA1B, 1985CA41, 1988CA26).
Yield measurements are reported from E_{p} = 2.5 to 13.5 MeV [see (1978AJ03) for the references]. The observed resonances are displayed in 19.19 (in PDF or PS). Measurements of spin observables for this reaction with polarized protons at E_{p} = 135 MeV were reported by (1989WAZZ). Total cross sections for production of ^{18}F for E_{p} < 30 MeV were measured by (1990WA10). A cryogenic ^{18}O target technique is discussed in (1993FI08). See also (1986AI04).
Scattering studies have been carried out for E_{p} = 0.6 to 16.3 MeV and for E_{p} = 6.1 to 16.6 MeV: see (1978AJ03, 1983AJ01, 1987AJ02). Pronounced resonant structure is evident up to 14 MeV. Observed resonances are shown in 19.20 (in PDF or PS). For polarization measurements see (1982GL08; E_{p} = 800 MeV). See also (1987AJ02) and (1989PLZV). Coupledchannel analyses of cross section and analyzing power data for E_{p} = 398  697 MeV were carried out by (1988DE31). A Dirac optical model analysis for E_{p} = 800 MeV was reported by (1990PH02).
For polarization measurements at E_{p} = 90 MeV see (1986VO10) and see (1978AJ03). See also the tables of astrophysical reaction rates (1983HA1B, 1985CA41) and a study of the effect of electron screening on low energy fusion cross sections (1987AS05).
Yield measurements have been studied for E_{p} = 72 keV to 14 MeV: see (1972AJ02, 1983AJ01, 1987AJ02): observed resonances are displayed in 19.20 (in PDF or PS). Use of the resonance at E_{p} = 150 keV for ^{18}O depth profiling is discussed in (1991BA54).
Angular distributions of neutron groups corresponding to ^{19}F states with E_{x} < 8.2 MeV have been measured at E_{d} = 3 and 4 MeV: see 19.18 (in PDF or PS) in (1978AJ03) and 19.21 (in PDF or PS) here. See also the E_{d} = 25 MeV measurements of (1992TEZY).
Angular distributions of the deuterons corresponding to many states of ^{19}F have been analyzed by DWBA: the results are shown in 19.21 (in PDF or PS). Spectroscopic factors for population of J^{π} = 1/2^{+}, 5/2^{+}, 3/2^{+} levels at E_{x} = 0, 0.199, 1.554 MeV by (^{3}He, d) at E(^{3}He = 25 MeV have been deduced by (1994VE04). The spectroscopic factors obtained for ^{19}F*(7.54, 8.80), the T = 3/2, J^{π} = 5/2^{+} and 1/2^{+} analogs of ^{19}O*(0, 1.47) are in good agreement with those obtained for the ^{19}O states in the ^{18}O(d, p)^{19}O reaction: see (1978AJ03). A search for a state at E_{x} = 7.90 MeV [just below the ^{18}O + p threshold, and of astrophysical interest] has been unsuccessful: θ^{2}_{p} < 5 × 10^{5} (1986CH29). See also (1987AJ02).
Cross sections were measured at E_{α} = 65 MeV and analyzed with DWBA (1992YA08). Spinparity and isospin assignments were proposed. Spectroscopic factors were obtained and compared with shellmodel calculations. See 19.22 (in PDF or PS).
The decay is primarily by allowed transitions to ^{19}F*(0.197, 1.55), J^{π} = 5/2^{+}, 3/2^{+}. Very weak branches are also observed to ^{19}F*(0.11, 1.35, 3.91, 4.39), J^{π} = 1/2^{}, 5/2^{}, 3/2^{+}, 7/2^{+}: see 19.23 (in PDF or PS). The halflife is 26.96 ± 0.07 s: see reaction 1 in ^{19}O. The character of the allowed decay to the 5/2^{+} and 3/2^{+} states and the forbiddenness of the decay to the ground state of ^{19}F are consistent with J^{π} = 5/2^{+} for the ground state of ^{19}O, and with (7/2^{+}) for ^{19}F*(4.39). Gammaray branching ratios are displayed in 19.24 (in PDF or PS). See also (1983AJ01, 1985BR29).
The cross section for (γ, Tn) has been measured for E_{γ} = 10.5 to 28 MeV: it shows a clear resonance at E_{γ} ≈ 12 MeV and unresolved structures at higher energies: see (1978AJ03). More recently, photoneutron angular distributions were measured by (1989KU10) for E_{γ} = 15  25 MeV. E1 absorption strengths were deduced. An atlas of photoneutron cross sections is presented in (1988DI02). See also (1972AJ02, 1987AJ02). A model for describing relative (γ, n) and (γ, p) yields is discussed in (1986IS09).
(1984KE04) have measured absolute differential cross sections for the p_{0} and p_{1} channels at 7 angles for E_{γ} = 13.4 to 25.8 MeV. Angle integrated cross sections for (γ, p_{0}) show pronounced structures at E_{γ} = 15.45, 16.70, 17.35, and 18.55 MeV as well as a broad bump at ≈ 20.5 MeV. Additional minor structures may exist at E_{γ} = 13.65, 14.35, 15.85, 17.90, 19.5, 21.3, 22.2, and 23.5 MeV. In the (γ, p_{1}) reaction broad bumps appear at ≈ (17.0) and 21.5 MeV. The E2 cross section [from (γ, p_{0}) angular distribution coefficients] is estimated to be ≈ 0.37 of the E2 EWSR (1984KE04). The (γ, p_{tot}) cross section to 26 MeV has been derived by (1985KE03). See also (1978AJ03). A model for describing relative (γ, p) and (γ, n) yields is discussed in (1986IS09). In reaction (b) the (γ, t_{0}) reaction has been studied for E_{γ} = 18 to 23 MeV: two peaks are observed at E_{γ} = 18.8 and 20.1 MeV. It is suggested that J^{π} = 1/2^{} or 3/2^{}, T = 1/2. The (γ, t_{0}) process contributes ≈ 1% to the total GDR strength: see (1978AJ03).
The energy of the first excited state is 109.894 ± 0.005 keV; its width is (5.1 ± 0.7) × 10^{7} eV. ^{19}F*(1.46, 3.91, 7.66) are also excited. The scattering cross section is relatively small and structureless for E_{γ} = 14 to 30 MeV: see (1978AJ03).
The time spectrum of gamma rays following muonic capture reactions on the ^{19}F muonic atom was measured by (1993GO09). The hyperfine transition rates of muonic ^{19}F atoms were determined from these measurements. The hyperfine dependence of muon capture is related to the weak axial and pseudoscalar coupling in the nuclear medium.
With E_{e} = 78 to 340 MeV, most states of ^{19}F below E_{x} = 7.7 MeV have been observed with an energy resolution of 25  50 keV. Longitudinal and transverse form factors have been derived and compared with shellmodel calculations. The spectrum of positiveparity longitudinal excitations is dominated at higher momentum transfer by the 1/2^{+}, 3/2^{+}, 5/2^{+}, 7/2^{+} and 9/2^{+} members of the ground state K^{π} = 1/2^{+} band. The C2 strength is concentrated at E_{x} < 1.5 MeV with a small secondary concentration for 5.5 < E_{x} < 6.5 MeV. The C4 strength is spread from 3 to 6 MeV, predominantly in ^{19}F*(2.78) [J^{π} = 9/2^{+}]. The spectra of longitudinal excitations of negative parity states are dominated by ^{19}F*(1.35) [J^{π} = 5/2^{}] and ^{19}F*(5.5) [5/2^{} + 7/2^{}]. In the transverse mode ^{19}F*(0.11, 6.79) [J^{π} = 1/2^{}, 3/2^{}, respectively] are prominent. Agreement with theory is good for 5/2^{} and 7/2^{} but poorer for 1/2^{} and 3/2^{} states. The parity of ^{19}F*(5.34) is uncertain while that of ^{19}F*(6.55) is probably positive. States are reported at 7.587 and 7.753 MeV with J^{π} = (5/2^{}) and (7/2^{}), respectively (1985BR15). The form factors for ^{19}F*(0, 0.11, 2.78) have also been studied by (1986DO10) for q = 0.4  2.8 fm^{1}. Cross section measurements for ^{19}F states with E_{x} ≤ 4.4 MeV performed with E_{e} = 500 MeV and momentum transfer q = 1.4  2.6 fm^{1} were reported by (1987DO10). Form factors were compared with shell model calculations. For electromagnetic transition rates see 19.25 (in PDF or PS). For the earlier work see (1978AJ03, 1983AJ01, 1987AJ02). See also (1988BR1D).
Capture gamma rays were measured from broad neutron resonances in ^{19}F (1991IG1A). Strong primary M1 transitions to lowlying ^{20}F states were observed.
Angular distributions of neutron groups from elastic and inelastic scattering have been reported at E_{n} = 2.6, 14.1 and 14.2 MeV: see (1972AJ02). Neutron activation cross sections for reactions (b, c, d, f) were measured for E_{n} = 13.4  14.9 MeV by (1992KA1G). Reaction (e) is included in a review of (n, d) reactions for E_{n} = 14  15 MeV by (1993AT04). Nuclear model codes are used to calculate neutron induced reactions on ^{19}F for E_{n} = 2  20 MeV by (1992ZH15). See also (1989HO1H).
19.21 (in PDF or PS) in (1978AJ03) displays energy levels of ^{19}F derived from inelastic proton scattering. Angular distributions of various proton groups have been measured from E_{p} = 4.3 to 35.2 MeV [see (1978AJ03, 1983AJ01)] and at E_{p} = 2.76 and 2.97 MeV (1986OU01). The groundstate rotational band is characterized by β_{2} = 0.44 ± 0.04, β_{4} = 0.14 ± 0.04. The gyromagnetic ratio of ^{19}F*(0.197) is g = 1.442 ± 0.003 (1969BL18), 1.438 ± 0.005 (1984AS03). The mixing ratio for the 1.46 → 0.11 transition (3/2^{} → 1/2^{}; K = 1/2^{} band) δ(E2/M1) = 0.248 ± 0.020. The E2 strength is 18.7 ± 1.9 W.u. The 1.46 → 0 transition is pure E1 (δ = 0.01 ± 0.03). For references see (1983AJ01). See also ^{20}Ne in (1987AJ02). A study of Coulomb excitation by protons and antiprotons is discussed in (1993PI10). A discussion of the need for (p, p) crosssection data in thinfilm analyses by Rutherford backscattering is presented in (1993BO40). Experimental and theoretical studies of nucleon and cluster knockout by E_{p} = 30  150 MeV protons are reviewed in (1987VD1A). See also (1988BA83). The reactions ^{19}F(p, p'γ) and ^{19}F(p, αγ) were used in a study of protoninduced gamma ray emission spectroscopy to determine flourine concentration in materials by (1992ZS01).
This reaction is discussed in detail under ^{20}Ne in (1987AJ02); resonances are displayed in 20.23 (in PDF or PS), 20.24 (in PDF or PS), and 20.25 (in PDF or PS) in (1987AJ02). A recent measurement of the excitation function for E_{p} = 0.3  3.0 MeV is reported in (1993DA23). The absolute yield, angular distribution, and resonance width of photons from the 340.5 keV resonance was measured by (1991CR06). Tests of a new standard for flourine determination utilizing this reaction are described in (1992ZS01). See also the related work of (1994TA1B). An accelerator calibration procedure utilizing ^{19}F(p, αγ) is discussed in (1993LA1E). See also (1994BB10). A DWBA analysis for energies below the Coulomb barrier is presented in (1991HE16).
This reaction is discussed under ^{20}F in (1987AJ02). A recent measurement of the ^{20}F halflife utilizing this reaction was reported in (1992WA04).
Angular distributions have been measured for E_{d} = 2.0 to 15 MeV: see (1972AJ02, 1978AJ03).
Elastic angular distributions have been studied for E_{t} = 2 and 7.2 MeV: see (1972AJ02). More recently, differential cross sections were measured at E_{t} = 33 MeV and analyzed with a phenomenological optical model (1987EN06).
Elastic angular distributions have been measured for E(^{3}He) = 4.0 to 29 MeV [see (1972AJ02, 1978AJ03)] and at 25 MeV (1982VE13). < r^{2} > ^{1/2}_{matter} = 2.72 ± 0.12 fm (1982VE13). A strongabsorption model analysis for E(^{3}He) = 25 and 41 MeV is presented in (1987RA36).
Elastic angular distributions have been studied at E_{α} = 19.9 to 23.3 MeV and at 38 MeV: see (1972AJ02) and more recently at 50 MeV (1991FR02). Many inelastic groups have also been studied: see 19.22 (in PDF or PS) in (1978AJ03). Differential cross sections for ^{19}F levels at E_{x} = 0.20, 1.55, and 2.78 MeV were measured at E_{α} = 50 MeV by (1991FR02) and analyzed in a coupledchannels approach. See also (1988LE05) in which the alphaparticle strength function distribution for targets with 12 ≤ A ≤ 40 is discussed. The energy of the γray from the 1.35 → 0.11 transition is 1235.8 ± 0.2 keV; E_{x} is then 1345.7 ± 0.2 keV. g = 0.269 ± 0.043 (1983BI03). See also 19.10 (in PDF or PS). For τ_{m} see 19.11 (in PDF or PS). ^{19}F*(4.65) decays to the 9/2^{+} state ^{19}F*(2.78): the angular distribution of the cascade γrays and τ_{m} for ^{19}F*(4.65) indicate J^{π} = 13/2^{+}. See also (1983AJ01, 1987AJ02).
See (1978AJ03).
Angular distributions (reaction (a)) have been studied at E(^{12}C) = 40.6 MeV [see (1983AJ01)] and at 30.0 to 60.1 MeV [as well as at E(^{19}F) = 63.8 MeV] (1984TA08, 1986TAZO; to ^{19}F*(0, 0.197, 1.55, 2.78)) and at E(^{19}F) = 46.5 to 57.1 MeV (1984MA32; to ^{19}F*(0, 0.197)) [see (1984MA32, 1986VO12) for yield measurements] and at E(^{12}C) = 30, 40, 50, 60 MeV (1988TA12) to ^{19}F*(0.197, 1.554, 2.780 MeV). Measurements of evaporation residues at E(^{19}F) = 32  72 MeV were reported in (1990AN14). See also (1990XE01). Angular correlations involving the αdecay to ^{15}N_{g.s.} of twenty ^{19}F states have been measured at E(^{19}F) = 78.5, 82 and 144 MeV and analyzed with DWBA and strong absorption model calculations. Two new states with J^{π} = 5/2^{} or 7/2^{} are reported at 7.740 and 8.277 MeV [estimated ± 0.04 MeV]. It is suggested that ^{19}F*(7.26, 9.287) are 3/2^{+} and (7/2, 9/2)^{+}, respectively (1985SM04, 1987AJ02). See also (1983AJ01), and see the more recent application of molecular orbital theory to heavy ion scattering in (1988DI08).
Elastic scattering angular distributions have been studied at E(^{14}N) = 19.5 MeV and at E(^{15}N) = 23, 26, and 29 MeV: see (1983AJ01). See also the analysis of (1989HO1H).
Elastic angular distributions have been studied at E(^{16}O) = 21.4 and 25.8 MeV and at E(^{19}F) = 27, 30, 33, and 36 MeV (reaction (a)) [also to ^{19}F*(1.46) at the two higher energies], and E(^{16}O) = 60 and 80 MeV (1986FUZV; also to ^{19}F*(0.20, 1.55, 2.78)). See also the measurements of evaporation residue at E(^{19}F) = 32  72 MeV reported in (1989AN1D, 1990AN14). For reaction (b) at E(^{18}O) = 27, 30, 33 MeV, see (1978AJ03) and at E(^{18}O) = 10  16 MeV, see (1990XE01). See also (1987AJ02).
See (1983AJ01, 1987AJ02). A dynamical model analysis of deep inelastic interaction is reported in (1989BR14).
See (1983AJ01, 1987AJ02). Evaporation residues were measured for reaction (a) with E_{lab}(^{19}F) = 32  72 MeV and are reported in (1989AN1D, 1990AN14). See also (1989NI1D).
For fusion cross sections see (1985RO01). See also (1987AJ02). Measurements of evaporation residue for E_{lab}(^{19}F) = 32  72 MeV are reported in (1989AN1D, 1990AN14). A parametrization of measured fusionevaporation residue excitation functions is described in (1988DO07). See also the comment (1989FR05) on this work and the reply (1989DO03). See also (1990SC18).
See (1978AJ03).
See 19.23 (in PDF or PS) in (1978AJ03).
^{3}He groups are observed at E_{p} = 45 MeV leading to some T = 1/2 states in ^{19}F and to ^{19}F*(7.66), the 3/2^{+}; T = 3/2 analog of ^{19}O*(0.095): see reaction 14 in ^{19}Ne and (1978AJ03).
The parity violating asymmetry of the 110 keV γrays emitted by polarized ^{19}F* nuclei is A_{γ} = (6.8 ± 2.1) × 10^{5} (1982EL08, 1987EL03). See also (1978AJ03).
Cross sections have been measured at thermal energies and reported in (1988KO25, 1989KO16). See also (1988CA26).
An evaporationmodel calculation of the cross section for this reaction at E_{n} = 12.6  19.9 MeV was reported in (1991ZH19). See also (1978AJ03).
See (1984NE1A).
