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## 10C (1979AJ01)

(See Energy Level Diagrams for 10C)

GENERAL: See also (1974AJ01) and Table 10.22 [Table of Energy Levels] (in PDF or PS).

Model calculations: (1974IR04, 1976IR1B).

Special reactions (See also reaction 2 in (1974AJ01).): (1973BA81, 1974BA89, 1974RI1A, 1976BE1K, 1976BU16, 1977AR06).

Pion reactions (See also reactions 3 and 9 here.): (1975GI1B, 1975RE01, 1977HO1B, 1977WA02, 1978AM01).

Astrophysical questions: (1972PA1C, 1976VI1A, 1977SI1D).

Other topics: (1974IR04, 1976IR1B, 1976VO1C).

Ground state properties: (1975BE31) (Note added in proof: Q0 = -23360.74 ± 0.5 keV (J.A. Nolen, private communication): this leads to an atomic mass excess of 15699.9 ± 0.5 keV for 10C.).

 1. 10C(β+)10B Qm = 3.651

10C decays with a half-life of 19.255 ± 0.053 sec to 10B*(0.7, 1.7): the branching ratios are (98.53 ± 0.02)% and (1.465 ± 0.014)% respectively (1972RO03): see reaction 40 in 10B and Table 10.20 (in PDF or PS).

 2. 7Li(7Li, 4n)10C Qm = -18.172

See (1974CE06).

 3. 9Be(p, π-)10C Qm = -136.633

At Ep = 185 MeV the π- spectrum shows groups corresponding to 10C*(0, 3.36 ± 0.07, 5.28 ± 0.06, 6.63 ± 0.15). Angular distributions have been obtained for the π- corresponding to these four states. The π+- intensity ratio is usually ≫ 1 for analog states in 10Be and 10C (1973DA09). The population of 10Be*(0, 3.35, 5.28) is also reported at Ep = 613 MeV (1978CO15). See also (1974DI20, 1975RE01, 1976DI10, 1976NO1D; theor.).

 4. 9Be(3He, 2n)10C Qm = -5.566

See (1974MO23).

 5. 10B(p, n)10C Qm = -4.434

Ethresh. = 4880.6 ± 0.6 keV (1974RO21); the mean of this measurement and the earlier measurement of (1966FR09) leads to Q0 = -4432.84 ± 0.6 keV (1974RO21). See also (1976FR1D).

The first excited state of 10C is located at Ex = 3.3527 ± 0.0015 MeV (1969PA09; from γ-decay). τm for 10C*(3.35) = 155 ± 25 fsec; Γγ = 4.25 ± 0.69 meV (1968FI09). Angular distributions have been measured for the n0 and n1 groups and for the neutrons corresponding to 10C*(5.2 ± 0.3) at Ep = 30 and 50 MeV. The excitation of 10C*(6.5 ± 0.3, 8.3 ± 0.3, 8.9 ± 0.3) is also reported (1970CL01). See also 11C in (1980AJ01).

 6. 10B(3He, t)10C Qm = -3.670

Angular distributions have been measured at E(3He) = 14 MeV (1970NU02; t0) and 217 MeV (1976WI05; t0, t1 and t to 10C*(5.6)). The latter have been compared with microscopic calculations using a central + tensor interaction [Jπ = 0+, 2+, 2+] (1976WI05). The previously reported structures at 5.28 ± 0.06 and 6.58 ± 0.06 MeV (1966MA36) are best fitted by Ex = 5.22 ± 0.04 [Γ = 225 ± 45 keV], 5.38 ± 0.07 [300 ± 60 keV] and 6.580 ± 0.020 MeV [190 ± 35 keV] (1975SC27). [It is not clear which of the 5.2 - 5.4 MeV states is the 2+ state studied by (1976WI05).] See also (1974AJ01) and 13N in (1981AJ01).

 7. 10B(6Li, 6He)10C Qm = -7.158

See (1974AJ01).

 8. 12C(γ, 2n)10C Qm = -31.846

See (1977JO02) and 12C in (1980AJ01).

 9. 12C(π+, d)10C Qm = 110.728

At Eπ+ = 49.3 MeV dσ/dΩlab = 0.65 ± 0.25 μb/sr (θ = 30°) for the transitions to 10C*(0 + 3.4) (1978AM01).

 10. 12C(p, t)10C Qm = -23.364

Angular distributions have been reported at Ep = 30.0 to 54.1 MeV [see (1974AJ01)] and at 51.9 MeV (1977YA10; t to 12C*(0, 3.35, 5.28, 6.6)) and 80 MeV (1977AN1E; t to 12C*(0, 3.35, 5.3)). L = 0, 2 and 2 for 10C*(0, 3.35, 5.28 ± 0.06), and therefore Jπ = 0+, 2+ and 2+: see (1967BE27, 1977YA10) but note that the "5.28 MeV" state is probably unresolved [see reaction 6 and 10Be]. At Ep = 51.9 MeV 10C*(0, 3.4) are strongly excited and states at Ex = 5.28, 5.55 and 6.6 MeV [L = 2 → Jπ = 2+] are weakly populated. The (p, t) angular distributions are compared with those of the (p, 3He) reaction to analog states in 10B (1977YA10).

The excitation energy of 10C*(3.4) is 3350.0 ± 1.0 keV (1974BE66). (1967BE27) find Ex = 6.61 ± 0.06 MeV, Γc.m. = 300 ± 50 keV. See also (1974KA15, 1977BA2L) (Note added in proof: Q0 = -23360.74 ± 0.5 keV (J.A. Nolen, private communication): this leads to an atomic mass excess of 15699.9 ± 0.5 keV for 10C.)

 11. 12C(12C, 10C)14C Qm = -18.723

 12. 13C(3He, 6He)10C Qm = -15.241

At E(3He) = 70.3 MeV the angular distributions of the 6He ions corresponding to the population of 10C*(0, 3.35) have been measured. The group to 10C*(3.35) is much more intense than the ground state group: multi-step processes may be important (1973KA16). (1976DE27) suggest, on the basis of an FRDWBA analysis, that the process can be interpreted as a direct cluster transfer to both final states. See also (1974AJ01).

 13. 14N(3He, 7Li)10C Qm = -12.816

See (1971DE37).