
^{10}C (1979AJ01)(See Energy Level Diagrams for ^{10}C) 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: Q_{0} = 23360.74 ± 0.5 keV (J.A. Nolen, private communication): this leads to an atomic mass excess of 15699.9 ± 0.5 keV for ^{10}C.).
^{10}C decays with a halflife of 19.255 ± 0.053 sec to ^{10}B*(0.7, 1.7): the branching ratios are (98.53 ± 0.02)% and (1.465 ± 0.014)% respectively (1972RO03): see reaction 40 in ^{10}B and Table 10.20 (in PDF or PS).
See (1974CE06).
At E_{p} = 185 MeV the π^{} spectrum shows groups corresponding to ^{10}C*(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^{+}/π^{} intensity ratio is usually ≫ 1 for analog states in ^{10}Be and ^{10}C (1973DA09). The population of ^{10}Be*(0, 3.35, 5.28) is also reported at E_{p} = 613 MeV (1978CO15). See also (1974DI20, 1975RE01, 1976DI10, 1976NO1D; theor.).
See (1974MO23).
E_{thresh.} = 4880.6 ± 0.6 keV (1974RO21); the mean of this measurement and the earlier measurement of (1966FR09) leads to Q_{0} = 4432.84 ± 0.6 keV (1974RO21). See also (1976FR1D). The first excited state of ^{10}C is located at E_{x} = 3.3527 ± 0.0015 MeV (1969PA09; from γdecay). τ_{m} for ^{10}C*(3.35) = 155 ± 25 fsec; Γ_{γ} = 4.25 ± 0.69 meV (1968FI09). Angular distributions have been measured for the n_{0} and n_{1} groups and for the neutrons corresponding to ^{10}C*(5.2 ± 0.3) at E_{p} = 30 and 50 MeV. The excitation of ^{10}C*(6.5 ± 0.3, 8.3 ± 0.3, 8.9 ± 0.3) is also reported (1970CL01). See also ^{11}C in (1980AJ01).
Angular distributions have been measured at E(^{3}He) = 14 MeV (1970NU02; t_{0}) and 217 MeV (1976WI05; t_{0}, t_{1} and t to ^{10}C*(5.6)). The latter have been compared with microscopic calculations using a central + tensor interaction [J^{π} = 0^{+}, 2^{+}, 2^{+}] (1976WI05). The previously reported structures at 5.28 ± 0.06 and 6.58 ± 0.06 MeV (1966MA36) are best fitted by E_{x} = 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 ^{13}N in (1981AJ01).
See (1974AJ01).
See (1977JO02) and ^{12}C in (1980AJ01).
At E_{π+} = 49.3 MeV dσ/dΩ_{lab} = 0.65 ± 0.25 μb/sr (θ = 30°) for the transitions to ^{10}C*(0 + 3.4) (1978AM01).
Angular distributions have been reported at E_{p} = 30.0 to 54.1 MeV [see (1974AJ01)] and at 51.9 MeV (1977YA10; t to ^{12}C*(0, 3.35, 5.28, 6.6)) and 80 MeV (1977AN1E; t to ^{12}C*(0, 3.35, 5.3)). L = 0, 2 and 2 for ^{10}C*(0, 3.35, 5.28 ± 0.06), and therefore J^{π} = 0^{+}, 2^{+} and 2^{+}: see (1967BE27, 1977YA10) but note that the "5.28 MeV" state is probably unresolved [see reaction 6 and ^{10}Be]. At E_{p} = 51.9 MeV ^{10}C*(0, 3.4) are strongly excited and states at E_{x} = 5.28, 5.55 and 6.6 MeV [L = 2 → J^{π} = 2^{+}] are weakly populated. The (p, t) angular distributions are compared with those of the (p, ^{3}He) reaction to analog states in ^{10}B (1977YA10). The excitation energy of ^{10}C*(3.4) is 3350.0 ± 1.0 keV (1974BE66). (1967BE27) find E_{x} = 6.61 ± 0.06 MeV, Γ_{c.m.} = 300 ± 50 keV. See also (1974KA15, 1977BA2L) (Note added in proof: Q_{0} = 23360.74 ± 0.5 keV (J.A. Nolen, private communication): this leads to an atomic mass excess of 15699.9 ± 0.5 keV for ^{10}C.)
See ^{14}C in (1976AJ04).
At E(^{3}He) = 70.3 MeV the angular distributions of the ^{6}He ions corresponding to the population of ^{10}C*(0, 3.35) have been measured. The group to ^{10}C*(3.35) is much more intense than the ground state group: multistep 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).
See (1971DE37).
