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## 13O (1991AJ01)

(See the Isobar Diagram for 13O)

GENERAL: (1985AN28, 1986AN07, 1987SA15, 1989AYZU). See also (1986AJ01) and 13.21 [Table of Energy Levels] (in PDF or PS) here.

Mass of 13O: We adopt the atomic mass excess of 23113 ± 10 keV of (1988WO1C). See also (1981AJ01). 13O is then bound with respect to 12N + p and 11C + 2p by 1.514 and 2.115 MeV, respectively.

 1. 13O(β+)13N Qm = 17.767

The half-life of 13O has been reported to be 8.7 ± 0.4 ms (1965MC09), 8.95 ± 0.20 ms (1970ES03), 8.55 ± 0.05 ms (1990AS01): the weighted mean is 8.58 ± 0.05 ms and we adopt it. 13O decays to a number of states of 13N, some of which subsequently decay to 12C*(0, 4.4): see 13.20 (in PDF or PS). See also (1989WI24; astrophys.) and (1989WO1E; theor.).

 2. 9Be(13C, 9He)13O Qm = -49.440

At E(13C) = 380 MeV 9He*(0, 3.8) are populated (1988BO20). The atomic mass excess of 9He derived from this work is 41.5 ± 0.6 MeV. In calculating Qm, we used the value 40.8 ± 0.1 MeV (1987SE05): see 9He in (1988AJ01).

 3. 12C(p, π-)13O Qm = -155.392

At Ep = 613 MeV the ground state of 13O and an excited state at Ex = 2.82 ± 0.24 MeV are observed in addition to unresolved structures (1978CO15). [See Fig. 4 for analog region in 13B.] The angular distribution of the π- to 13Og.s. has been measured at Ep = 200 MeV (1980HO20), as has Ay at Epol. p = 205 MeV: see (1986AJ01). For a study of inclusive pion production at Ep = 180 and 201 MeV see (1985BI04). See also (1985CO11, 1986KU1J, 1990KU1H; theor.).

 4. 13C(π+, π-)13O Qm = -19.988

At Eπ+ = 164 MeV excited states are reported at Ex = 2.75 ± 0.04 and 4.21 MeV, as is a broad [Γ = 1.2 MeV] structure corresponding to one or more states at Ex = 6.02 ± 0.08 MeV. At Eπ+ = 292 MeV these states are not observed. Angular distributions have been studied at Eπ+ = 164 and 292 MeV to 13Og.s. and at 164 MeV to 13O* (4.21) (1984SE15). At Eπ+ = 292 MeV (θ = 5°) a structure with a width of 2.0 ± 1.0 MeV is suggested to be due to a state at Ex = 8.4 ± 0.5 MeV Q = -27.4 ± 0.5 MeV] (1989MO09). See also (1990MO02).

 5. 16O(3He, 6He)13O Qm = -30.511

See (1981AJ01).