
^{10}C (1988AJ01)(See Energy Level Diagrams for ^{10}C) GENERAL: See also (1984AJ01) and Table 10.18 [Table of Energy Levels] (in PDF or PS) here. Model calculations: (1984SA37, 1987BL18). Special states: (1986AB10). Astrophysical questions: (1987RA1D). Complex reactions involving ^{10}C: (1983FR1A, 1983OL1A, 1986HA1B, 1987AR19, 1987BEYI, 1987RI03, 1987SN01, 1987TAZU, 1988BEYJ, 1988CA06, 1988KI05, 1988SA19). Reactions involving pions and other mesons (See also reactions 2 and 4.): (1985LI1E, 1987SI18). Other topics: (1982KA1D, 1985AN28, 1986YA1F). Groundstate properties of ^{10}C: (1983ANZQ, 1985AN28, 1987BL18, 1987SA15). Mass of ^{10}C: The threshold energy for the ^{10}B(p, n)^{10}C reaction is 4876.90 ± 0.37 keV: then Q_{0} = 4430.17 ± 0.34 keV (1984BA12). Using the (1988WA18) masses for ^{10}B, p and n, the atomic mass excess of ^{10}C is then 15698.8 ± 0.5keV. This value does not include a contribution from unpublished work on ^{12}C(p, t)^{10}C quoted in (1984AJ01). However, we adopt the (1988WA18) value: 15699.1 ± 0.3 keV.
[Q_{0} = 0.25 ± 0.02b] (1987RA01).
^{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: see (1974AJ01). See also reaction 40 in ^{10}B and (1986CA1L).
At E(^{3}He) = 235 MeV ^{10}C*(3.35) is populated (1984BI08). π^{} production in this reaction has also been studied by (1984BR22) at E(^{3}He) = 910 MeV.
Tetraneutron (n^{4}) production has been studied in this and in other reactions involving ^{10}C at E(^{7}Li) = 82 MeV (1987ALZG; prelim.): it is not observed.
Angular distributions of π^{} groups have been measured at E_{p} = 185 MeV (to ^{10}C*(0, 3.35, 5.28, 6.63)), at 200 MeV (g.s.), at 800 MeV (to ^{10}C*(0, 3.35, 5.3, 6.6)) [see (1984AJ01)] and at E_{pol. p} = 650 MeV (1986HO23; ^{10}C*(0, 3.35); also A_{y}). A_{y} measurements have also been reported at E_{p} = 200 to 250 MeV: see (1984AJ01).
The E_{x} of ^{10}C*(3.35) = 3352.7 ± 1.5 keV, τ_{m} = 155 ± 25 fsec, Γ_{γ} = 4.25 ± 0.69 meV. Angular distributions have been measured for the n_{0} and n_{1} groups and for the neutrons to ^{10}C*(5.2 ± 0.3) at E_{p} = 30 and 50 MeV [see (1974AJ01, 1979AJ01)] and for the n_{0} and n_{1} groups at E_{p} = 14.0, 14.3 and 14.6 MeV (1985SC08) and 15.8 and 18.6 MeV (1985GU1C; prelim.). See also (1984BA1R, 1988KA2E).
Angular distributions have been measured at E(^{3}He) = 14 MeV and 217 MeV: see (1979AJ01). The latter [to ^{10}C*(0, 3.35, 5.6)] have been compared with microscopic calculations using a central + tensor interaction [J^{π} = 0^{+}, 2^{+}, 2^{+}]. Structures have been reported at 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].
Angular distributions have been reported at E_{p} = 30.0 to 54.1 MeV and at 80 MeV [see (1974AJ01, 1979AJ01, 1984AJ01)]. L = 0, 2 and 2 to ^{10}C*(0, 3.35, 5.28) thus leading to 0^{+}, 2^{+} and 2^{+} for these states [but note that the "5.28 MeV" state is certainly unresolved]: see reaction 6 and Table 10.18 (in PDF or PS). ^{10}C*(6.6) is also populated. Two measurements of the excitation energy of ^{10}C*(3.4) are 3353.5 ± 1.0 keV, 3354.3 ± 1.1 keV: see (1984AJ01) [based on Q_{m}]. See also (1987KW01; 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 groundstate group: see (1979AJ01).
