
^{10}C (1974AJ01)(See Energy Level Diagrams for ^{10}C) GENERAL: See also (1966LA04) and Table 10.24 [Table of Energy Levels] (in PDF or PS). Model calculations: (1968FA1B, 1969SA1A, 1969SO08, 1973SA30). Special reactions: (1967AU1B, 1969YI1A, 1971AR02). Pion reactions (See also reaction 3.): (1973AL1E, 1973CH20). Other topics: (1968FA02, 1968FA1B, 1969SO08, 1969SO1E, 1970FO1B, 1972AN05, 1972CA37). Groundstate properties: (1966KE16, 1968FA02, 1968FA1B, 1969GA1G, 1973SA30).
^{10}C decays with a halflife of 19.42 ± 0.06 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 39 in ^{10}B and Tables 10.21 (in PDF or PS) and 10.24 (in PDF or PS).
See (1972PA1C; astrophys.).
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). See also (1971DA10, 1972RO22, 1973DI1J).
See (1973MO1N).
The first excited state of ^{10}C is located at E_{x} = 3.3527 ± 0.0015 MeV (1969PA09: from γdecay), 3.38 ± 0.03 MeV (1963EA01: neutron threshold), 3.35 ± 0.01 MeV (1966SE03: 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 (1969BR13, 1973GO1V), (1966LA04) and ^{11}C in (1975AJ02).
At E(^{3}He) = 14 MeV the angular distribution of the t_{0} group has been measured (1970NU02). At E(^{3}He) = 30.6 and 40 MeV triton groups have been observed to ^{10}C*(0, 3.37 ± 0.03, (5.03 ± 0.06), 5.28 ± 0.06, (5.60 ± 0.06), 6.58 ± 0.06) (1966MA36). At E(^{3}He) = 30.3 MeV, the energy of the first excited state is determined to be 3.344 ± 0.008 MeV, and the triton groups corresponding to the two states at E_{x} = 5.03 and 5.60 MeV suggested by (1966MA36) are assigned to ^{11}C (1968BR23). See also ^{13}N in (1976AJ04).
Both ^{10}C*(0, 3.35) are strongly populated at E(^{6}Li) = 30 MeV, θ = 16° (1972LE1P).
See (1959OC07).
Angular distributions have been reported at E_{p} = 30.0 to 54.1 MeV (1967CO23; t_{0}), 43 MeV (1967BE27; t_{0}, t_{1}, and to ^{10}C*(5.3)), 43.7 MeV (1966CE05; t_{0}, t_{1}) and 49.5 MeV (1970NE17; t_{0}, t_{1}; polarized protons). L = 0, 2 and 2, respectively for ^{10}C*(0, 3.35, 5.3), and therefore J^{π} = 0^{+}, 2^{+} and 2^{+}: see (1967BE27). [^{10}C*(5.3) may correspond to several unresolved states: see ^{10}Be.] At E_{p} = 43 and 52 MeV (1967BE27) report the excitation of ^{10}C*(5.29 ± 0.06, 6.61 ± 0.06) [Γ_{c.m.} = 300 ± 50 keV for both these states]. The states at E_{x} = 7.2 ± 0.2 and 10.2 ± 0.2 MeV reported by (1965BA17) are not observed. See also (1965CA1C, 1968TA1P) and (1971KA04; theor.).
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). Three states of ^{10}C are observed with E_{x} ≈ 10 MeV. One of these [E_{x} = 10.72 MeV] is very strongly populated. A search for a T = 2 state with E_{x} ≈ 22 MeV was unsuccessful (1973BE2J).
See (1971DE37).
