(See Energy Level Diagrams for 17O)
Shell model: (1968KA1C, 1969FE1A, 1970HA49, 1970IR01, 1971AR1R, 1971HS02, 1971JE02, 1971KA40, 1971LE30, 1971MU23, 1971WI01, 1971WI1F, 1972BE22, 1972EL1C, 1972EN03, 1972HA1Q, 1972KA38, 1972LE1L, 1973BA2J, 1973DE13, 1973JU1A, 1973KU04, 1973LA1D, 1973RE17, 1973SM1C, 1974LO04, 1974RI09, 1976PO01).
Astrophysical questions: (1972CL1A, 1973AR1E, 1973AU1B, 1973AU1D, 1973AU1C, 1973EN1A, 1973SM1A, 1973TA1D, 1973TR1B, 1974DE1M, 1975AR1E, 1975AU1D, 1975CO1J, 1975EN1A, 1975LA1E, 1975NO1D, 1975SC1H, 1975TR1A, 1976FI1E, 1976KO1K, 1976ME1H, 1976WA1M).
Other topics: (1968KA1C, 1969EL1A, 1970AL1E, 1970SI1J, 1971AU08, 1971BA2Y, 1971BE59, 1971ER1C, 1971JE02, 1971KA40, 1971KO12, 1971LA1D, 1971PL1D, 1971RY1A, 1971SE1C, 1971NG01, 1972CA37, 1972CH16, 1972DA21, 1972HA57, 1972KA38, 1972LE1L, 1972MA57, 1972NI15, 1972SH32, 1973AR1K, 1973BA2J, 1973BE1N, 1973DE13, 1973GO1H, 1973HY1A, 1973KO1J, 1973KU04, 1973MA48, 1973OS1A, 1973PA1F, 1973RA1E, 1973RE17, 1973RO1R, 1973RO1P, 1973SP1A, 1973YO1A, 1974AU03, 1974BR1E, 1974RE03, 1974SA05, 1974SL1C, 1975DR1D, 1975HE10, 1975MI02, 1975SH1H, 1976FE1B, 1976MA04, 1976MA05, 1976VA1C).
Q = -25.6 mb (1968SC18);
Q = -25.78 mb (1969SC34).
See also (1970AL1D, 1970SI1J, 1971RY1A, 1971SH26, 1971TA1A, 1971WI01, 1972GL06, 1972LE1L, 1972VA36, 1972YO1B, 1973AR1J, 1973HI1A, 1973HO32, 1973LE07, 1973MI1C, 1973RE17, 1973RO1P, 1973SU1B, 1973SU1C, 1974DE1E, 1974HA27, 1974MC1F, 1974NE1B, 1974RE03, 1975BE31, 1975MI02, 1976CH1T, 1976PO01).
Mass of 17O: the atomic mass excess of 17O is -810.5 ± 0.8 keV (A.H. Wapstra, private communication).
The angular distribution of the α0+1 group has been measured at E(14N) = 27.6 MeV (1964WA1B).
Angular distributions have been studied at E(16O) = 11 MeV (17Og.s.) and 15 and 18 MeV (17O*(0, 0.87)) (1970BA49, 1971BA68). The excitation curve for the one-neutron transfer to 17O*(0.87) has been measured for E(16O) = 6 to 22 MeV (1970BA55). See also (1971NI04) and (1971AL1D; theor.).
Cross sections to various of the final states have been measured at E(7Li) = 5.20 MeV (1966MC05).
Cross sections to various of the final states have been measured at E(6Li) = 4.72 MeV (1966MC05).
Proton groups have been identified to various states of 17O with Ex ≤ 15.8 MeV and angular distributions of proton groups have been studied for E(6Li) = 3 to 20 MeV: see (1971AJ02) for a complete listing. See also (1970JO1D) and 18F in (1978AJ03).
Angular distributions have been measured at E(7Li) = 3.24 - 3.64 MeV (1967MO23: d0, d1) and at 21.1 MeV (1971SC21: see Table 17.7 (in PDF or PS)). The latter have been analyzed by a Hauser-Feshbach method. See also (1971AJ02) and 19F in (1978AJ03).
Cross sections have been measured for the population of 17O*(0, 0.87, 3.06, 3.84) for E(12C)c.m. = 2.40 to 6.34 MeV (1974HA25). At E(9Be) = 26.3 MeV, α-groups are observed to the first six states of 17O and to 17O*(7.5, 8.4, 9.8, 11.0, 11.8, 13.6). Some of the higher states (unresolved) may be formed by some sort of direct mechanism (1975VE10).
The yield of neutrons increases monotonically for Eα = 0.475 to 0.700 MeV: S(E) = [(5.48 ± 1.77) + (12.05 ± 3.91)E] × 105 MeV · b (1968DA05). Astrophysical considerations are discussed by (1968DA1D, 1973BA10, 1975FO19, 1976DE1G). Yield curves for reaction (a) have been measured for Eα = 1.0 to 22.5 MeV: see (1971AJ02) for a listing of the earlier work and (1973BA10: total neutron yield; Eα = 1.0 to 5.4 MeV), (1976MC11: n0; Eα = 4.2 to 8.7 MeV; T = 3/2 states). Elastic scattering studies (reaction (b)) have been studied at Eα = 2.0 to 26.6 MeV: see (1971AJ02) for the earlier results and (1973KU18, 1973LE28: 18 to 26.6 MeV). See also (1974WE1P). Observed resonances in the neutron yields and anomalies in the elastic scattering are displayed in Table 17.8 (in PDF or PS). Some of the Jπ values derived from the polarization studies of (1971BA06: n0; Eα = 3.36 to 4.80 MeV) and (1973BU14: n0; Eα = 2.08, 2.25, 2.43 MeV). See also (1970RO08, 1971SE1E, 1974LO1B) and (1972HA2A; theor.).
See (1974SC1L; theor.).
At E(6Li) = 18 MeV angular distributions have been measured to many 17O states: see Table 17.7 (in PDF or PS) here and Table 17.8 (in PDF or PS) in (1971AJ02) (1970BE31, 1971BE2D). Angular distributions are also reported at E(6Li) = 25.6 MeV (1971GO1C: d0 → d3 and d to 17O*(7.5, 8.9)). See also (1973OG1A).
Angular distributions have been measured at E(7Li) = 17 MeV (1970BE31), 20.5 MeV (1971BE2D, 1971SC21; DWBA analysis) and 30.1 MeV (1971GO1C): see Table 17.7 (in PDF or PS) here and Table 17.8 (in PDF or PS) in (1971AJ02).
Angular distributions have been studied at E(16O) = 14 MeV (17Og.s.) and 17 and 20 MeV (17O*(0, 0.87)) (1970BA49). The excitation curve for the one-neutron transfer to 17O*(0.87) has been measured for E(16O) = 12 to 25 MeV (1970BA55). See also (1971BA68) and (1973DE21).
The capture cross sections at 90° for γ0 and for γ1 have been studied for E(3He) = 3.2 to 7.5 MeV and angular distributions of the γ-rays have been studied at the six observed resonances: see Table 17.9 (in PDF or PS) (1976CH04).
The excitation function for reaction (a) shows a resonance in the n0 and n3+4 yields at E(3He) = 4.1 MeV but not in the n1+2 yield: Jπ = 1/2- or 3/2- is suggested [see, however, Table 17.9 (in PDF or PS)] (1970HO08).
Resonances are observed in the 3He yield (reaction (d)) at E(3He) = 5.1 MeV and in the α0 and α1 yield (reaction (e)) at 3.6 and 4.1 MeV. On the basis of a two-level analysis of the α-channel and an optical model plus resonance analysis of the elastic data, the corresponding 17O states [21.7, 22.1, 23.0 MeV] are assigned Jπ = 5/2+, 7/2- and 1/2+, respectively (1971KE08, 1972KE08): see Table 17.9 (in PDF or PS). (1972KE08) also report excitation functions in the range E(3He) = 2.2 - 7.0 MeV (α0 → α3), 3.2 - 4.4 MeV (p0 → p3), 3.2 - 5.5 MeV (d) and 4.0 to 6.1 MeV (3He): angular distributions for the α-groups have been measured at a number of energies. See also (1971AJ02).
The upper limits to the decays 3.06 → 0 and 3.84 → 0.87 are, respectively, 2 and 5%. A study of n - γ correlations leads to Jπ = 1/2- and (5/2-) for 17O*(3.06, 3.84) (1964AL11). See also (1973CL1E; astrophys. considerations).
The excitation functions for γ0 and γ1 have been measured at 90° for Et = 1.5 to 3.6 MeV: a broad resonance is observed in the γ0 yield corresponding to 17O*(20.45). Some evidence is also reported for structures in the γ1 yield (1973LI1G: prelim. results). Excitation functions have also been measured for the p0 → p3, d0, t0 and α0 and α1 groups for Et = 1.0 to 2.0 MeV: the reactions appear to proceed primarily via a direct interaction mechanism (1964SC09). See also (1974FA1A; theor.).
Angular distributions have been measured for 17O states with Ex < 7.6 MeV in the range Ep = 8.1 - 33.3 MeV: see a listing of the references in (1971AJ02). The sequential decay (reaction (b)) appears to take place via 17O states with 8.46 ≤ Ex ≤ 13.57 MeV. Those involved are believed to have J ≥ 5/2, Γα/Γ ≥ 0.6 (1969BA17). See also 18F in (1978AJ03) and (1971BU1K; theor.).
At E(6Li) = 18 MeV, the 3He groups in this reaction and the triton groups in the mirror reaction (see 17F, reaction 7) have been compared: 17O*(3.84, 4.55, 5.22, 5.70 + 5.73) are strongly excited. It is suggested that 17O*(5.22) and 17F*(5.21) are analogs with Jπ = 9/2-. 17O*(0, 0.87, 3.06, 5.08, 5.38, 5.87 + 5.94, 6.86, 6.97) are also populated (1973BI01).
At E(10B) = 100 MeV 17O*(7.75, 9.15) [Jπ = 11/2- and 9/2-, respectively] are populated (1976HA1W).
Peaks in the excitation functions of both γ0 and γ1 have been observed corresponding to 17O*(21.3, 21.9, 22.8) (1972CA1M; abstract).
The excitation function has been measured for Ed = 0.5 to 5.3 MeV. Above Ed = 1 MeV, pronounced peaks are observed, presumably to be ascribed to numerous overlapping resonances (1958WE31). The differential cross sections at 10° have been measured for Ed = 2.2 to 5.9 MeV for the neutrons to 16O*(0, 6.13, 7.12, 8.87, 9.85, 10.95, 11.08) (1971MU09). Polarization measurements have been reported for En = 1.6 to 5.5 MeV (n0: see (1971AJ02)) and at 4.83 MeV (1972FO17: n to 16O*(0, 6.13, 7.12, 8.87, 9.85, 10.95 + 11.08, 11.52 + 11.60, 12.05, 12.44 + 12.53, 12.80)) and 10.0 and 11.8 MeV (1971HI09; n0). See also (1973BO1G) and 16O, and (1971HA1R).
Excitation functions have been obtained for Ed = 0.3 to 2.7 MeV (1957BO04) and 4.25 to 6.25 MeV (1973BO1G: p0 → p3). Resonant structure at Ed = 1.3 and 1.9 MeV [17O*(15.2, 15.7)] is reported by (1957BO04).
The excitation function for the d0 group has been measured for Ed = 4.25 to 6.25 MeV (1973BO1G).
The α0 yield curve for Ed = 0.8 to 1.8 MeV indicates two resonances at Ed = 1.06 and 1.25 MeV [Γ ≈ 100 and 200 keV, respectively], attributed to an 17O state at Ex = 14.98 MeV [Jπ = 5/2+] and to one or more 17O states at Ex = 15.15 MeV [Jπ = 5/2+ or 7/2-] (1966TI03). In the range Ed = 1.2 to 2.5 MeV a broad maximum is observed in both the α0 and α1 yields at Ed ≈ 1.7 MeV (1965MA1A). The excitation function has also been studied for Ed = 5 to 10 MeV (1974WE1P).
At E(3He) = 18 MeV angular distributions analyzed by DWBA, have been obtained for a number of 17O states as displayed in Table 17.10 (in PDF or PS): the wave functions of Zuker, Buck and McGrory appear to provide a good description of most of the states below Ex = 9 MeV (1972LE01). Angular distributions have also been reported at E(3He) = 2.4 to 4.1 MeV (1973AB1D: p0 → p2) and at 15 MeV (1975HA33: p0, p2). For the decay of the first T = 3/2 state at Ex = 11.08 MeV, see Table 17.11 (in PDF or PS) (1973AD02).
At Eα = 45.4 MeV, the deuteron spectrum is dominated by the groups corresponding to states with Ex = 7.742 ± 0.020 and 9.137 ± 0.030 MeV. These states are assigned Jπ = (11/2-) and (9/2-) and arise from a dominant (d5/2)25p-11/2 configuration. Angular distributions were measured as well for the deuterons corresponding to 17O(0) and to states with Ex = 0.87 ± 0.05, 5.208 ± 0.030, 5.690 ± 0.030, 7.367 ± 0.030, 8.459 ± 0.030, 8.890 ± 0.030 and 9.814 ± 0.030 MeV. In addition the excitation of states with Ex = 3.85 ± 0.05, 4.57 ± 0.05 and 8.147 ± 0.030 MeV is also reported (1969LU07).
At E(11B) = 113.5 MeV, 17O states at 7.6 and 9.0 MeV are strongly populated. The excitation of 17O*(0, 0.9, 3.0, 5.4) is also reported (1975PO10).
The scattering amplitude bound is a = 5.80 ± 0.05 fm (1965DO1B). The coherent scattering cross section is 4.23 ± 0.07 b (1964ST25). Earlier cross section, angular distribution and polarization measurements are listed in Table 17.10 (in PDF or PS) of (1971AJ02). Recent measurements of σt are reported by (1972PE1E: 0.2 - 20 MeV), (1974SC1C: 0.5 - 20.5 MeV), (1973FO11: 0.6 - 0.9, 1.12 - 1.16, 1.39 - 4.33 MeV), (1971FO1A: 2.5 - 15.0 MeV), (1972KI1D: elastic; 4.34 - 8.56 MeV), (1971AN16: 14.7 MeV), (1972AU01: 24.63 - 58.90 MeV) and (1974BA52, 1975BA2L: 28 - 54 GeV). See also (1976GAYV). (1973BU1D, 1974BU19) report σ(θ) at small angles for En = 7.40 to 9.50 MeV. Polarization studies are reported by (1973HI09, 1974HI1B: En = 1 - 4 MeV) and (1976DR08: 2.25 to 3.90 MeV).
Recent high resolution cross section measurements and analyses of the elastic scattering and of the (n, α) and 13C(α, n) data have led to a much better understanding of the 17O structure below Ex = 9.5 MeV: see Table 17.12 (in PDF or PS) (1973FO11, 1973JO01). (1973JO01) has performed a multilevel two-channel R-matrix analysis. Five states contain nearly 100% of the 1d3/2 strength and have their eigenenergy at Ex ≈ 5.7 MeV [the dominant state is 17O*(5.08)]. Spectroscopic factors are deduced for 26 states in 17O for 4.5 < Ex < 9.5 MeV [see Table 17.12 (in PDF or PS)]: the sum of these factors is 1% for Jπ = 1/2+, 5% for 1/2-, 12% for 3/2-, 99% for 3/2+, 0.1% for 5/2+, 1% for 5/2- and 14% for 7/2- (1973JO01).
See also 16O, (1971SE1D), (1971AJ02, 1972LA1F, 1973MU14, 1974SA1N) and (1970GN1A, 1970TI02, 1970VA1M, 1971DO15, 1971LE1B, 1971MA05, 1971MA62, 1971SC22, 1972HA2A, 1972LE1M, 1972PH06, 1972SC45, 1973LE1K, 1973SC1R, 1973ST05, 1973WE06, 1974GE03, 1974HI04, 1974MU1F, 1974PH03, 1975BE06, 1975CA05, 1975GE08, 1975PH01, 1975TH12; theor.).
Earlier cross section measurements are listed in Table 17.10 (in PDF or PS) of (1971AJ02). The cross sections for production of 6.13 and (6.92 + 7.12) γ-rays in the range En = 6.5 to 10 MeV show a number of resonances: see Table 17.13 (in PDF or PS) (1959HA13). See also the more recent studies of (1970LU16: En = 6.74 to 8.20 MeV; γ6.13) and (1970OR1B: En = 6.35 to 16.52 MeV; γ6.13, γ6.92, γ7.12). See also (1969RO1F, 1972KI1D, 1976NO1F).
See 15N in (1976AJ04).
The cross section has been measured from threshold to 20 MeV: see Table 17.10 (in PDF or PS) in (1971AJ02) and (1970OR1B: 8 - 15.5 MeV; γ3.09, γ3.68, γ3.85) and (1973BO26: 14.1 MeV). See also (1968DA1E, 1971BR33, 1971NY03). Table 17.12 (in PDF or PS) reflects the results from a multilevel two-channel R-matrix analysis of the data from this reaction and from the elastic scattering of neutrons (1973JO01). See also (1969RO1F, 1976NO1F), (1971AJ02, 1976GAYV) and (1972HA2A; theor.).
Observed proton groups are displayed in Table 17.14 (in PDF or PS). Angular distributions have been measured at many energies in the range of Ed = 0.3 to 63.2 MeV: see Table 17.13 (in PDF or PS) in (1971AJ02) for the earlier references and (1973CA30: Ed = 1.0 to 2.0 MeV; p0, p1), (DeForest, quoted in (1971KO21): 8 MeV; p0, p1), (1972CO15, 1973DA17: 9.3 and 13.3 MeV; p0, p1, p3, p4, p5, p8), (1972BR12: 12.3 MeV; p0, p1) and (1974CO04: 25.4, 36.0, 63.2 MeV: p0, p1, p5).
The lifetime of 17O*(0.87) is 258.6 ± 2.6 psec: see Table 17.7 (in PDF or PS) in (1971AJ02). See also (1971DO13, 1973DO1D). Eγ = 870.81 ± 0.22 keV (1966WI01). The width of 17O*(5.08) observed in this reaction (Γ = 70 keV) is ≈ 0.7 that observed in 16O(n, n): see (1974CO04, 1974FO17).
See also 18F in (1978AJ03), (1970CA1C, 1971GR2B, 1972PR1D), (1976SC1G; applied work) and (1970DO10, 1970KI15, 1970KU1B, 1970OH1C, 1971BO50, 1971CO1B, 1971DO1A, 1972BU23, 1972DZ06, 1972FR1E, 1972GO04, 1972PH06, 1972SC45, 1972SC20, 1973BA74, 1973DO02, 1974BA19, 1974CO10, 1974GO02, 1974IM01, 1974OR1A, 1975CO12, 1976BO15, 1976SH13; theor.).
The angular distribution of the d0 group has been studied at Et = 5.5 MeV (1961BA10).
The angular distribution involving 17Og.s. has been studied at E(7Li) = 36 MeV. The population of 17O*(0.87, 3.06, 3.84, 4.55, 5.38) is also reported (1973SC26).
The excitation of 17O*(0, 0.87) is reported at E(11B) = 113.1 MeV (1967PO13).
The product of the spectroscopic factors in the initial and final states [17O*(0.87)] is 0.72 (1975SE03: from measurements of σt below Coulomb barrier). The angular distribution to 17O*(0.87) has been measured at E(13C) = 36 MeV (1976WE21). See also (1973BR1C) and (1974BE1J; theor.).
At E(14N) = 79 MeV angular distributions involving 17O*(0, 0.87) have been studied: an anomaly is observed in the phase behavior of the distribution to the excited state. From this and other studies it is concluded that a multistep process via inelastic scattering is unlikely to occur in the excitation of 2s1/2 states (1976MO03). An angular distribution involving 17O*(0 + 0.87) has also been reported at E(14N) = 155 MeV (1975NA15). See also (1976NA09).
At E(18O) = 42 and 52 MeV, the angular distributions involving 17O*(0, 0.87) have been studied (1975RE15).
The (γ, n0) differential cross section at 98° has been measured for Ebs = 8 to 33 MeV by (1976WO1D): both narrow and broad structures are observed throughout this energy range. The (γ, n) cross section has also been measured for Eγ = 7.6 to 30 MeV: it is dominated by a broad giant resonance centered at Ex ≈ 23 MeV (1976ME1K). The 17O(γ, 2n) cross section is very small for these energies (1976ME1K). For reaction (c) see (1964GR08).
The 17O charge radius, rrms = 2.662 ± 0.026 (using a distorted wave approximation), and 2.700 ± 0.026 fm (using a Born approximation) (1970SI02, 1970SI1K). Inelastic scattering in a range of momentum transfer q = 0.6 - 1.1 fm-1 has led to calculation of B(E3) values from the measured Coulomb form factors: see Table 17.15 (in PDF or PS) (1975KI15). See also (1976AU1G).
See (1973IS07; theor.).
Angular distributions of elastically scattered protons have been studied at Ep = 8.62, 9.45 and 10.5 MeV (1975CR04; also p1 and p2), 11 MeV (1976AL06) and 65.8 MeV (1972LE27, 1972LE28, 1972LE1G). The matter rms radius of 17O is 0.04 ± 0.03 fm greater than that for 16O (1973LE07). See also 18F in (1978AJ03) and (1970OH1C, 1971DO1A, 1975CO12, 1976CO01; theor.).
The angular distribution of elastically scattered deuterons has been studied at Ed = 18 MeV (1976LI01).
Angular distributions involving 17O*(0, 0.87) have been studied at E(16O) = 22, 24, 28 and 32 MeV (1973GE04, 1974GE01) and at E(17O) = 25.7, 27.7, 29.8 and 32.0 MeV (1975KA24): second-order transfer contributions are found to be important (1975KA24). See also (1973FI1C, 1974GO1L, 1975VO1B) and (1973BA2F, 1974BA46, 1974BE1J, 1974BO13, 1974YU01, 1975IM04, 1975WO1E; theor.).
Angular distributions have been measured at Ep = 17.6 MeV (1963LE03: d0 → d2), 18.2 MeV (1967LU05: d0 → d3), 20.0, 24.4, 29.8, 37.5 and 43.6 MeV (1974PI05: d0 → d4) and 24.4 MeV (1973PI09: d0 → d7; polarized protons). See also 19F in (1978AJ03), (1976DA1K) and (1973IG02, 1973OR09, 1973YA1B; theor.).
Angular distributions of alpha particles are reported by (1965WA1D: α0, α1) at E(3He) = 2.68 to 6.47 MeV and by (1969DE06: see Table 17.16 (in PDF or PS)) at E(3He) = 16 MeV. The T = 3/2 states reported by (1969DE06) are displayed in Table 17.16 (in PDF or PS) [the isospin identification is based on the enhanced excitation and the narrow widths of these states]. The branching ratios for the various decays of 17O*(11.08) [the lowest T = 3/2 state in 17O] and for the analog state in 17F are displayed in Table 17.11 (in PDF or PS): the decay width of the 17O state is approximately 200 times greater than that of the 17F state (1973AD02).
Angular distributions (reaction (a)) have been measured at E(18O) = 20 and 24 MeV (1971BA68, 1971KN05). For S-factor measurements see (1974SW04). Cross sections for reaction (b) are several orders of magnitude less than those for reaction (a) for E(18O)c.m. = 3 - 7.7 MeV (1974SW04).
The 0.87 MeV γ-ray is observed when 19F captures π- mesons (1976EN02).
Angular distributions of the t0 and t1 groups are reported at En = 14.4 MeV (1968RE07).
Angular distributions have been measured at Ep = 30.5 MeV (1967CO05: to 17O*(0, 0.87)) and at 42.4 MeV (1974NE03: to 17O*(0, 0.87, 3.06, 3.84)): comparisons have been made with the analog transitions in the mirror reaction 19F(p, t)17F. See also (1972HU1B, 1972PR1D), 20Ne in (1978AJ03) and (1971AJ02). For reaction (b) see (1971DE1F).
Observed α-groups are displayed in Table 17.14 (in PDF or PS). Angular distributions have been measured at many energies in the range Ed = 0.3 to 27.5 MeV: see Table 17.16 (in PDF or PS) in (1971AJ02) for the earlier work and (1969ZA1A: 1.10 - 3.65 (α0, α1) and 1.40 to 3.65 MeV (α2, α3)), (1971BE2F: 1.35 - 2.0 MeV; α0 → α3) and (1972LA18: 3 MeV; α0 → α3). See also (1976BI03, 1976NE1D) and (1970SO12; applied).
At En = 14.1 MeV angular distributions are reported for α0 and α1 by (1966MC14) and (1971BA82: also α2). (1971KA18) report the excitation of a number of states of 17O with Ex < 8 MeV. See also (1972LI30) and (1973CL1E; astrophys. questions).