A=13C (1970AJ04)

TUNL Nuclear Data
Evaluation Home Page

Information on mass
chains and nuclides

3 4

5 6

7 8

9 10

11 12

13 14

15 16

17 18

19 20

Group Info

Publications

HTML

General Tables

Level Diagrams

Tables of EL's

NSR Key# Retrieval

ENSDF

Excitation Functions

Thermal N Capt.

G.S. Decays

Half-Lives Table

TUNL Dissertations

NuDat at BNL

Useful Links

Citation Examples

Home

Sitemap

Directory

Email Us

WWW TUNL

¹³C (1970AJ04)

(See Energy Level Diagrams for ¹³C)

GENERAL: See Table 13.4 [Table of Energy Levels] (in PDF or PS).

Model calculations: (1959BR1E, 1960PH1A, 1960TA1C, 1960ZE1B, 1961BA1G, 1961BA1E, 1961KU17, 1961KU1C, 1961NE1B, 1962EA01, 1963BO1G, 1963MA1E, 1963PE04, 1963SE19, 1963TR02, 1964AM1D, 1964NA1D, 1964ST1B, 1965CO25, 1965MA1T, 1965ME1C, 1965NE1C, 1965WE1D, 1966EL08, 1966GU08, 1966HA18, 1966MA1P, 1966NO1B, 1966RI12, 1966WI1E, 1967BA12, 1967CO32, 1967FA1A, 1967HU1C, 1967KU1E, 1967PO1J, 1967RI1B, 1967WA1C, 1968FI1F, 1968HO1H, 1968RE1G, 1969KU1J, 1969VA1C, 1970KU1K).

Other: (1962BA1K, 1964LI1B, 1965BO1M, 1966HE1C, 1966OL1C, 1968RI1H, 1968TA1C, 1968WI1B, 1969AL1G, 1969AR1G, 1969AU1D, 1969BA2V, 1969CH1C, 1969HA1G, 1969HE1N, 1969MC1C, 1969OC1A).

Ground state: μ = +0.702381 ± 0.000002 nm (1964LI14). See also (1958LA04, 1963BE36, 1964BE24, 1967CO1D, 1967SH14, 1968PE16, 1968RO1E, 1969FU11, 1969NO1E, 1969VA1C).

1. (a) ⁶Li(⁷Li, n)¹²C Q_m = 20.924 E_b = 25.871
(b) ⁶Li(⁷Li, p)¹²B Q_m = 8.337
(c) ⁶Li(⁷Li, 2n)¹¹C Q_m = 2.204
(d) ⁶Li(⁷Li, d)¹¹B Q_m = 7.192
(e) ⁶Li(⁷Li, t)¹⁰B Q_m = 1.994
(f) ⁶Li(⁷Li, α)⁹Be Q_m = 15.220

Differential and total cross sections have been measured for E(⁷Li) = 3.8 to 6.0 MeV for the proton groups to ¹²B*(0, 0.95, 1.67, 2.6 + 2.7, 3.4), the deuteron groups to ¹¹B*(0, 2.14, 4.44, 5.02, 6.74 + 6.79, 7.30), the triton groups to ¹⁰B*(0, 0.72, 1.74) and the α group to ⁹Be(0). The dominant reaction appears to be transfer of an α-particle. The total cross sections generally increase smoothly with energy without showing any structure (1967KI03). See also ⁹Be and ¹⁰B in (1966LA04) and ¹¹B and ¹²B in (1968AJ02). The ¹¹C yield has been measured for E(⁶Li) = 1.2 to 3.6 MeV by (1961NO05). See also (1957NO17, 1963GA15, 1963HU02, 1963KA1E, 1964GA1E, 1965BE1X).

2. ⁷Li(⁷Li, n)¹³C Q_m = 18.619

See (1957NO17, 1962BE24).

3. ⁷Li(¹¹B, αn)¹³C Q_m = 9.954

The ΔE for the 3.85 and 3.68 MeV transitions is 169.63 ± 0.23 keV (1969TH01). See also (1963HO1E).

4. ⁹Be(α, γ)¹³C Q_m = 10.651

At E_α = 6.446 ± 0.004 MeV, corresponding to the excitation of the first T = 3/2 state in ¹³C (E_x = 15.114 ± 0.005 MeV, Γ ≤ 7 keV), Γ_αΓ_γ/Γ ≈ 2 eV for the ground state transition. Capture radiation has also been observed to one of the three states ¹³C*(3.1, 3.7, 3.9) (1966MI1K). (1968SN1B) find E_x = 15.107 ± 0.003 MeV, Γ = 6.7 ± 1.7 keV. See also (1969MC1C).

5. ⁹Be(α, n)¹²C Q_m = 5.704 E_b = 10.651

Resonances for neutron groups to the ground and first excited states of ¹²C, for γ-rays from ¹²C*(4.4, 12.7, 15.1) and resonances in the total neutron cross section are given in Table 13.5 (in PDF or PS) (1959AJ76, 1963SE04, 1965GI02, 1965GR22, 1966MI12, 1968DA05, 1968SN1B). See also ¹²C in (1968AJ02) and (1959SM98, 1959BR75, 1967FO1B, 1968DA1D, 1968OB1B, 1968VE06). The yield of neutrons to ¹²C*(7.65) has been measured for E_α = 1.7 to 6.4 MeV (1968OB1B, 1970WE1L) and 6 to 10.1 MeV (1966MI12). Angular distributions of ground-state neutrons suggest two broad resonances in the region E_α = 3.9 to 4.6 MeV, probably J^π = 3/2⁺ and 5/2⁺ (1957RI38). At the threshold for formation of the T = 3/2 state at 15.11 MeV, weak interference anomalies are observed in the n₀ and n₁ yields (1966MI1K).

Polarization measurements have been carried out for E_α = 1.9 to 4.5 MeV by (1965LI09; n₀, n₁) and for 4.5 to 5.9 MeV by (1966DO1E, 1967DE1U; n₀, n₁). See also (1962GO1J, 1963GO1J, 1965CL1B, 1965TS1A, 1966DA1B, 1966DE1M, 1968ST1R).

6. ⁹Be(α, p)¹²B Q_m = -6.884 E_b = 10.651

See ¹²B.

7. ⁹Be(α, d)¹¹B Q_m = -8.028 E_b = 10.651

See ¹¹B.

8. (a) ⁹Be(α, α)⁹Be E_b = 10.651
(b) ⁹Be(α, α'n)⁸Be Q_m = -1.665
(c) ⁹Be(α, n)⁴He⁴He⁴He Q_m = -1.570

A number of excitation functions have been measured for elastically scattered α particles (reaction (a)) for E_α = 1.7 to 20 MeV: these show considerable resonance structure with the variations being most prominent below 10 MeV but persisting up to 20 MeV. Angular distributions have been analyzed by the optical model: see (1965TA1C, 1969GO1P). See also ⁹Be in (1966LA04) and (1967FU08). For reactions (b) and (c), see (1952AJ38) and ⁸Be in (1966LA04). See also (1963IG01).

9. (a) ⁹Be(⁶Li, d)¹³C Q_m = 9.178
(b) ⁹Be(⁷Li, t)¹³C Q_m = 8.183

At E(⁷Li) = 3.2 MeV, triton groups are observed to the first eight states of ¹³C (not all resolved). No triton groups are observed to the previously reported states at 5.51 and 6.10 MeV (1964CA05)^†.

^†Angular distributions for the triton groups to ¹³C*(0, 3.09, 3.68 + 3.85, 6.86) have been measured at E(⁷Li) = 5.6, 5.8, 6.0, 6.2 MeV (1969SN02).

For reaction (a) see reaction 3 (1969TH01). See also (1968OG1A).

10. ⁹Be(¹⁴N, ¹⁰B)¹³C Q_m = -0.963

See (1965GR1F, 1966EL1D, 1969BR1D).

11. (a) ¹⁰B(t, p)¹²B Q_m = 6.343 E_b = 23.878
(b) ¹⁰B(t, d)¹¹B Q_m = 5.199
(c) ¹⁰B(t, α)⁹Be Q_m = 13.227

The p₀ and p₁ yields from reaction (a), the d₀ yield from reaction (b) and the α₀ yield from reaction (c) have been determined for E_t = 0.8 to 2.0 MeV. There is no evidence of resonance behavior (1963HO19).

12. ¹⁰B(α, p)¹³C Q_m = 4.063
Q₀ = 4.0634 ± 0.0024 (1967OD01).

Proton groups have been observed to the first four states of ¹³C: see (1959AJ76) and (1962ED01). Angular distributions of ground state protons have been measured at E_α = 4.9 to 8.1 MeV (1957VO25), 12.1 to 16.0 MeV (1967IV1B), 22 MeV (1963YA1C), 25.9 MeV (1963TE1A), 27.5 and 33.1 MeV (1961YA02) and at 30.4 MeV (1959HU19). See also (1965NI1B).

A study of γ rays from this reaction and from ¹²C(d, p)¹³C shows three lines with E_γ = 0.1695 ± 0.0004, 3.844 ± 0.015 and 3.69 ± 0.02 MeV. The lifetime of ¹³C*(3.85) is (9.0^+2.5_-1.5) psec (1968RI16). (1968FO1F) find τ_m = 10.8 ± 1 psec. See also (1959DI46). The 3.69 MeV line shows approximately the maximum possible Doppler shift (τ < 0.3 psec): see also Table 13.16 (in PDF or PS). The 170 keV line is due to the cascade transition between the 3.85 and 3.68 MeV states; the internal conversion coefficient is consistent with E1, although M1 cannot be excluded. The probability of this cascade decay of 3.85 MeV state is 0.24 ± 0.05 (1956MA1Q, 1956MA52). The cascade decay via the 3.09 MeV state has a strength relative to all other decays of (9.3 ± 2.0) × 10^-3. This branching ratio is of the order expected for an E2 transition of single-particle (proton) strength (1960PI09)^†.

^† The intensity ratio for the transitions (3.85 → 3.68)/(3.85 → 0) is 0.55 ± 0.03. The cascade decay via ¹³C*(3.09), relative to the g.s. decay, is (2.5 ± 0.5) × 10^-2, E_γ = 3854 ± 1 keV (1969LI07).

The angular distributions and p-γ correlations for the 3.8 MeV radiation indicate J^π = 5/2⁺ for the 3.84 MeV state. If the 170 keV line is due to an E1 transition, the J^π of the 3.68 MeV state is then 3/2^- (J^π = 1/2^-, 3/2^- follows from ¹²C(d, p)¹³C); the angular distribution of the 3.68 MeV radiation is consistent with M1 (1954ST20): Γ_γ = 0.40 to 0.75 eV (1960KA13). The 3.68 MeV state also decays via the 3.09 MeV state with a probability of (6.5 ± 1.0) × 10^-3 (1960KA13). See also reaction 31, (1960EL1C), (1969GA01) and ¹⁴N.

13. ¹⁰B(⁶Li, ³He)¹³C Q_m = 8.085

The first four states of ¹³C have been observed at E(⁶Li) = 4.89 MeV (1966MC05). See also (1965CA05).

14. ¹⁰B(⁷Li, α)¹³C Q_m = 21.410

At E(⁷Li) = 5.20 MeV, angular distributions have been measured for the α-particles to ¹³C*(0, 3.1, 3.7 + 3.9, 6.9). Alpha groups have also been observed to ¹³C*(7.5 + 7.7, 9.5, 9.9, 10.5, 11.1, 12, 13.5, 16.1) (1966MC05). See also (1963MI02, 1963MO1B, 1965CA05).

15. (a) ¹⁰B(¹⁴N, ¹¹C)¹³C Q_m = 1.143
(b) ¹⁰B(¹⁹F, 4α)¹³C Q_m = -2.257

For reaction (a) see (1966CO27); for reaction (b) see (1963HO1E).

16. ¹¹B(d, γ)¹³C Q_m = 18.679

See (1961SU17, 1963SU1C, 1966SU05).

17. ¹¹B(d, n)¹²C Q_m = 13.732 E_b = 18.679

The yield of neutrons has been measured for E_d = 0.2 to 11 MeV: observed resonant structure is displayed in Table 13.6 (in PDF or PS) (1965AL17). See also (1959AJ76, 1959NE1A, 1965CL02, 1965SI12, 1966HU1H). The yield of 15.1 MeV γ-rays shows 4 resonances for E_d = 1.5 to 5.5 MeV: see Table 13.6 (in PDF or PS) (1958KA31, 1964KU09). See also (1963KI02, 1967LE1J). Polarization of neutrons has been studied at E_d = 1.4 to 1.9 (1966MA21; n₀, n₁), 2 (1967MI1E, 1969MI20; n₀, n₁, n₂, n₃, n₇), 2.8 (1964CH1F; n₀, n₁), 2.8 to 4.0 (1967ME1L; n₀, n₁), 3.0 (1966BR1E; n₀) and 12.3 MeV (1964SM05; n₀, n₁). See also (1959BR75) and ¹²C.

18. ¹¹B(d, p)¹²B Q_m = 1.144 E_b = 18.679

It is reported that the thin-target yield rises smoothly from E_d = 0.3 to 3.1 MeV with no evidence of resonances (1949HU41, 1958KA31, 1963RO22, 1965SA15). However, (1964BR1A) reports a strong resonance at E_d = 2.3 MeV in the p₀, p₁ and p₂ yield. Analysis of yield curves of 0.95 and 1.67 MeV γ-rays (1968CH05) also suggest a broad resonance at E_d ≈ 2.1 MeV. See also (1963SE1F). The polarization of ¹²B recoils has been studied for E_d = 0.9 to 3.2 MeV: resonances in the recoil polarization are observed at E_d = 1.5, 2.1 and 3.0 MeV (see Table 13.6 (in PDF or PS)) (1967PF02). See also (1963KE06, 1967BE10). See also ¹²B and (1964TI03, 1967BO17, 1967TI1A).

19. ¹¹B(d, d)¹¹B E_b = 18.679

See ¹¹B in (1968AJ02) and (1963NE1H).

20. ¹¹B(d, α)⁹Be Q_m = 8.028 E_b = 18.679

The excitation function for α-particles to the ground state increases monotonically for E_d = 0.39 to 1.05 MeV (1963RO22, 1965SA15); that for the α-particles to ⁹Be*(2.43) increases monotonically for E_d = 0.39 to 0.70 MeV (1965SA15). At E_d = 1.83 MeV, a pronounced resonance is observed in the α₀, α₁, α₂ and α₃ yields: Γ_cm ≈ 200 keV (1964DU1C, 1969FR03). Some gross structure is observed in these yields for E_d = 1.0 to 3.2 MeV (1964BR1A, 1969FR03). See also (1966DR04, 1968CO31, 1969MC1C) and ⁹Be in (1966LA04).

21. ¹¹B(t, n)¹³C Q_m = 12.422

See ¹⁴C.

22. ¹¹B(³He, p)¹³C Q_m = 13.185
Q₀ = 13.1854 ± 0.0040 (1967OD01); see also (1964MA57).

Levels derived from reported proton groups are listed in Table 13.7 (in PDF or PS).

The proton groups thought to correspond to ¹³C levels at E_x = 5.51 and 6.10 MeV (1958MO99) come instead from the proton decay of ¹³N*(9.48, 10.37) fed in the reaction ¹¹B(³He, n)¹³N (1966CH18). See also (1963GA03). At E(³He) = 8 to 12 MeV, proton groups are observed to the first five T = 3/2 states of ¹³C: see Table 13.7 (in PDF or PS) (1965HE1C, 1966HE1F). The angular distribution of the protons to the first T = 3/2 state at E_x = 15.106 MeV is consistent with J^π = 3/2^- (the known character of ¹³B_g.s.) (1965HE1C). The neutron and γ-widths of ¹³C*(15.10) are displayed in Table 13.8 (in PDF or PS) where they are compared with the corresponding quantities for ¹³N*(15.07) (1968CO27, 1969AD01). Comparison of the reduced widths for the particle decays to ¹²C(0) and ¹²C*(4.4) show that the form of the isospin impurity in the 15.1 MeV, T = 3/2 state, depends in T_Z (1969AD01). Preliminary results for the branching ratios for the α-decay to ⁹B(0) are (1.9 ± 0.5)% for ¹³C*(15.10) and (6.5 ± 1.5)% for ¹³C*(19.12) (1969NE1G). Other angular distributions have been measured at E(³He) = 4.5 MeV (1957HO61; p₀, p₁, (p₂ + p₃)), 8.6, 9.6 and 10.3 MeV (1963MA24; p₀) and 10 and 12 MeV (1968LI1K, 1969AD1C; p₀, p₁, p₂, p₄, p₆, p₇, p₁₀, p₁₁). The parity of ¹³C*(9.90) is odd (1969AD1C). See also (1959AL96, 1963CL1A, 1969BA1Z, 1969MC1C).

23. ¹¹B(α, d)¹³C Q_m = -5.168

Differential cross sections of deuterons corresponding to ¹³C(0) have been measured at E_α = 23 and 25 MeV (1967AL16). See also (1968ZE1B).

24. ¹¹B(⁶Li, α)¹³C Q_m = 17.207

Angular distributions have been measured at E(⁶Li) = 4.72 MeV to the ¹³C ground state and to ¹³C*(3.1, 3.8 [u], 6.9, 7.5 [u]) [u = unresolved]. The ¹³C states at 8.86, 9.50 and 9.90 MeV have also been observed (1966MC05). See also (1963MO1B, 1965CA05).

25. ¹¹B(¹⁶O, ¹⁴N)¹³C Q_m = -2.057

See (1968OK06).

26. ¹²C(n, γ)¹³C Q_m = 4.947
Q₀ = 4.94603 ± 0.00015 (1968SP01);
Q₀ = 4.94647 ± 0.00017 (1967PR10);
Q₀ = 4.947 ± 0.001 (1965JA09).

The thermal capture cross section is 3.4 ± 0.3 mb (1964ST25), 3.8 ± 0.8 mb (1963MO1C). Reported γ-transitions are listed in Table 13.9 (in PDF or PS). See also (1963MA60, 1964FO1A, 1967FO1B, 1968RO1H).

27. ¹²C(n, n)¹²C E_b = 4.947

The total cross section data up to 164 MeV is summarized in (1964ST25). Table 13.11 (in PDF or PS) lists recent cross section measurements: see also ¹²C in (1968AJ02), (1964ST25) and (1959HA06, 1966DE1M, 1968HA1V). Angular distributions are summarized in (1963GO1M). See also (1966GA1M, LA67Q). The coherent scattering length (thermal, bound) is 6.656 ± 0.004 fm (1967HO1J, 1967KO1M). See also (1961WI1A, 1963SE13, 1966DA1B, 1969BA1P). An effective range theory analysis ascribes the s-wave scattering to the (bound) 3.09 MeV state: θ²(E_n = 0) = 0.20 ± 0.02 (1963SE13).

In the region E_n = 0 to 20 MeV a number of resonances have been reported: see Table 13.10 (in PDF or PS) (1960TS02, 1961LA1A, 1961FO07, 1966LI03, 1964HA1G, 1965HA21, 1968BO34, 1968CI1A, 1968DA1F, 1968SC1G, 1969DA13), and (1959AJ76) for a listing of the earlier references.

Polarization measurements have been carried out with E_n up to 24 MeV: see Table 13.12 (in PDF or PS) for recent references and (1959AJ76) for earlier ones. See (1963HA1G, 1966DA1B, 1966RO1B) for a general discussion of ¹²C + n polarization.

28. (a) ¹²C(n, n')¹²C* E_b = 4.947
(b) ¹²C(n, n')⁴He⁴He⁴He Q_m = -7.274

From threshold to E_n = 19 MeV, twelve resonances are observed in the yield of 4.4 MeV γ-rays: see Table 13.13 (in PDF or PS) (1959HA13, 1968BO34). Cross sections have also been measured for various of the elastic transitions for E_n = 5.5 to 15.6 MeV by (1959HA06, 1959SI79, 1960BE24, 1963BO15, 1964CL05, 1964PE20, 1964ST30, 1965WI17, 1967BR23, 1968HA1V, 1969MA39). See (1959AJ76) for a listing of the earlier references. See also (1959GA1D, 1968GA1L, 1969GA1U) and ¹²C.

For reaction (b) see ¹²C and (1959AJ76).

29. ¹²C(n, 2n)¹¹C Q_m = -18.720 E_b = 4.947

See (1961BR1A, 1952BR61, 1958AS63, 1969MA39).

30. (a) ¹²C(n, p)¹²B Q_m = -12.588 E_b = 4.947
(b) ¹²C(n, np)¹¹B Q_m = -15.957

The cross section for reaction (a) has been measured from threshold to E_n = 22 MeV (1959KR69, 1968RI02). It exhibits a strong resonance with a peak cross section of 19 mb at E_x ≈ 22 MeV in ¹³C and another weaker resonance corresponding to E_x ≈ 20.5 MeV (1968RI02). See also (1959AL83, 1963LE1D, 1966JE1B).

For reaction (b) see (1962AU1A).

31. ¹²C(n, α)⁹Be Q_m = -5.704 E_b = 4.947

The cross section for the transition to ⁹Be(0) shows a broad structure at E_n ≈ 8 MeV (1963DA12). See also (1963AL10, 1963CH1C, 1966HU1J, 1967KO27, 1969KI02) and ⁹Be in (1966LA04).

32. (a) ¹²C(d, p)¹³C Q_m = 2.722
(b) ¹²C(d, np)¹²C Q_m = -2.225
Q₀ = 2.725 ± 0.005 (1961LO1C);
Q₀ = 2.7223 ± 0.00061 (1967OD01).

Measurements on the proton groups are summarized in Table 13.14 (in PDF or PS). In addition to a number of relatively sharp states, the proton spectrum exhibits a conspicuous broad structure attributed to a ¹³C level at E_x = 8.4 MeV, Γ = 1.1 ± 0.3 MeV. [It seems probable that this level is to be identified with the D_3/2 level of similar width observed in ¹²C(n, n)¹²C at E_x = 8.25 MeV: see Table 13.10 (in PDF or PS)].

Angular distributions have been studied at many energies, and analyzed by PWBA and DWBA. A listing of the early work is given in (1959AJ76). Recent experiments are listed in Table 13.15 (in PDF or PS). See also (1965GA1A). A DWBA stripping description of the direct reaction interaction part of the reaction almost certainly will require the use of spin dependent potentials. There is pronounced compound nucleus formation even up to E_d = 11 MeV (1963EV04, 1967SC29). See also (1969PE09, 1969PE1L) and ¹⁴N.

Observed gamma rays are listed in Table 13.16 (in PDF or PS). The cascade decay of the 3.85 MeV state (via ¹³C*(3.68)) occurs in 37 ± 4% of the decays; the direct transition occurs in 62 ± 4% of the events (1966GO15). The mixing ratio for the transition 3.68 → 0 χ(E2/M1) = -(0.096^+0.030_-0.021), while the transition 3.85 → 0, χ(E3/M2) = +(0.12 ± 0.03) (1966PO11). Angular correlation measurements at E_d = 2.8 to 3.7 MeV show Γ(E2)/Γ_γ ≲ 5% for ¹³C*(3.68) and Γ(E3)/Γ_γ ≲ 2% for ¹³C*(3.85) (1962FL06). See also (1966KA05, 1966PR1B, 1967TI1A, 1968GO14). The lifetime of ¹³C*(3.09) is < 10 fsec (1968RI16), < 15 fsec (1968AL03) [see also (1967ME02)]; τ_m for ¹³C*(3.68) < 26 fsec (1968RI16); τ_m for ¹³C*(3.85) = 7.5⁺³_-2 psec (1962SI08): see also Table 13.17 (in PDF or PS).

A study with polarized deuterons at E_d = 7 and 10 MeV is reported by (1968YU01; p₀, p₁). For other polarization measurements see ¹⁴N, (1959AJ76) and (1961GO1K). For reaction (b), see (1963PI04, 1968BO02, 1969SA1K).

33. ¹²C(t, d)¹³C Q_m = -1.311

At E_t = 12 MeV, DWBA fits have been made of the angular distributions of the deuterons to ¹³C*(0, 3.09, 3.68, 3.85) (1966GL01). See also (1960MU07, 1961BA10, 1969GL1C, 1969LI1D).

34. ¹²C(³He, 2p)¹³C Q_m = -2.771
See (1965DO1H, 1967FO1E, 1967HE1E, 1969ST1L).

35. ¹²C(α, ³He)¹³C Q_m = -15.631
At E_α = 56 MeV, angular distributions of the ³He particles to ¹³C*(0, 3.68 + 3.85) have been analyzed by DWBA (1968GA1C, 1968LE1G, 1969GA11). A detailed comparison has been made between the angular distributions of the ground state ³He particles and of tritons from the mirror reaction ¹²C(α, t)¹³N (1969GA11).

36. (a) ¹²C(¹¹B, ¹⁰B)¹³C Q_m = -6.509
(b) ¹²C(¹⁴N, ¹³N)¹³C Q_m = -5.606
(c) ¹²C(¹⁹F, ¹⁸F)¹³C Q_m = -5.483

For reaction (a) see (1963SA1E, 1967PO13, 1969BR1D). For reaction (b), see (1965GA1B, 1967BI1F, 1969BR1D, 1969DO07). For reaction (c), see (1968GA1K).

37. ¹³B(β^-)¹³C Q_m = 13.437
¹³B decays to ¹³C*(0, 3.68, 7.55, 8.86): see ¹³B and Table 13.2 (in PDF or PS) (1962MA19, 1969JO21).

38. ¹³C(γ, γ)¹³C
By means of nuclear resonant scattering of bremsstrahlung, τ_m of ¹²C*(3.09) = 1.5 ± 0.2 fsec (1968RO02), τ_m of ¹²C*(3.68) = 1.5 ± 0.15 fsec (1969RA20): see Table 13.17 (in PDF or PS).

39. ¹³C(γ, n)¹²C Q_m = -4.947
The cross section appears to exhibit structure at ≈ 7.8, 8.9, 10.9 and 11.6 MeV (1965BE1A), at 13.3 ± 1 (Γ = 5 ± 1 MeV) and at ≈ 22 MeV (Γ ≈ 7 MeV) (1957CO57). For analyses of the work done on this reaction, see (1963HA1E, 1965ME1C). See also (1960ED01, 1964GR40) and (1959FU1A, 1960FR1B, 1961BA1G, 1964FR1C, 1964SH1C, 1969AU06, 1969AU1D, 1969OC1A).

40. ¹³C(γ, p)¹²B Q_m = -17.535
(1964DE12) report structures at E_γ = 18.5, 20.0, 23.5, 26.0 and 29.0 MeV. The main part of the cross section is in the 23.5 MeV peak which has Γ ≈ 3 MeV. A broad maximum near 25.5 MeV has been reported by (1956CO72, 1957CO57). See also (1965ME1C) and (1962NE14, 1964KO09).

41. ¹³C(γ, α)⁹Be Q_m = -10.651
See (1953MI31, 1964GR08).

42. ¹³C(e, e')¹³C*
From a study at E_e = 250 MeV, the ratio of the rms radius of the charge distribution for ¹³C to that of ¹²C is found to be 0.96 ± 0.01 (1967CR1C). See also (1968RA1B). Inelastic spectra show strong excitation of the negative parity states ¹³C*(3.68, 7.55, 8.86, 11.7, 13.76, 15.1, 19.12) (1969CA1C, 1969WI22). Excitation of ¹³C*(3.09, 3.85) has also been reported (1969CR1D, 1969WI22). See Table 13.18 (in PDF or PS). See also (1967KA1A, 1969TO05).

43. ¹³C(p, p')¹³C*
Angular distributions of the 3.09 MeV γ-rays are isotropic for E_p up to 5 MeV consistent with the assignment J = 1/2 (1960BA35). The elastic differential cross section has been studied for E_p = 1.37 to 2.38 MeV (1966GE03), 7 MeV (1969GU02), and at E_p = 32.9 MeV (1969MA2D). See also (1961RO1G, 1968RI1Q, 1969WA11). The Doppler-shift method leads to lifetime limits of τ < 10 fsec and τ < 26 fsec for ¹³C*(3.09, 3.68) (1968RI16): see Table 13.16 (in PDF or PS).

44. ¹³C(d, d)¹³C
Angular distributions of elastically scattered deuterons have been measured at E_d = 4.7, 5.0 and 5.3 MeV (1968CO04) and 15 MeV (1965DI1C). See also ¹⁵N.

45. ¹³C(³He, ³He')¹³C*
Angular distributions of elastically scattered ³He have been studied at E(³He) = 12, 15 and 18 MeV (1966KE08) and at 40 MeV (1969BA06). Angular distributions at E(³He) = 40 MeV have also been reported to ¹³C states at E_x = 3.09, 3.68, 3.85, 6.87, 7.55 ± 0.03, 8.86 ± 0.03 and 11.84 ± 0.03 MeV. ³He groups to ¹³C*(9.50 ± 0.03) and (15.11) are also reported, the latter only weakly (1968BA1E, 1969BA06). See also (1967AR17, 1969AR10, 1969ZU02).

46. ¹³C(α, α')¹³C*
Angular distributions of scattered α-particles have been studied at E_α = 33.4 MeV (1967AR17; ¹³C*(0, 3.68, 7.5)) and 40.5 MeV (1966HA19; ¹³C*(0, 3.09, 3.68 + 3.85, 7.5)). See also (1959FU62, 1968FA1A, 1969BA06).

47. (a) ¹³C(⁶Li, ⁶Li)¹³C
(b) ¹³C(⁷Li, ⁷Li)¹³C

Angular distributions of elastically scattered ⁶Li and ⁷Li ions have been measured at E(Li) = 20 MeV (1969BE90).

48. (a) ¹³C(¹²C, ¹²C)¹³C
(b) ¹³C(¹⁶O, ¹⁶O)¹³C

Angular distributions of elastically scattered ¹²C and ¹⁶O ions have been studied for E = 10 to 30 MeV (1968GO1H).

49. ¹³N(β⁺)¹³C Q_m = 2.221

See ¹³N.

50. ¹⁴C(p, d)¹³C Q_m = -5.952

At E_p = 12 MeV, the angular distribution of the deuterons to ¹³C(0) is PWBA-fitted with l = 1: θ² = 0.038 (1966GL01). At E_p = 18.5 MeV, angular distributions have also been obtained for ¹³C*(3.09, 3.68, 3.85) (1961LE1A, 1963LE03). See also (1969CU1D).

51. ¹⁴C(d, t)¹³C Q_m = -1.919

At E_d = 12 MeV, angular distributions of the tritons to ¹³C*(0, 3.09, 3.68, 3.85) have been PWBA fitted: θ² = 14.5, 0.43 and 5.76 for the three most energetic triton groups. The group to ¹³C*(3.85) does not show a stripping pattern (1966GL01). See also (1958MO97, 1959KU1C).

52. ¹⁴C(³He, α)¹³C Q_m = 12.402

Angular distributions of the α particles to ¹³C(0) have been determined at E(³He) = 2, 6, 8, 10 (1964DU1A) and 44.8 MeV (1966BA13). At the highest energy, the differential cross sections to ¹³C*(3.68) and to the T = 3/2 state at 15.11 MeV have also been measured (1966BA13). See also (1966GO1J).

53. ¹⁴N(n, d)¹³C Q_m = -5.325

Angular distributions of ground state deuterons have been determined at E_n = 14.1 to 14.7 MeV (1963ZA01, 1967AN08, 1967FE06, 1968MI02). Excitation of ¹³C*(3.68) is also reported (1957CA07, 1963ZA01, 1967FE06). Gamma rays with energies of 3.686 ± 0.003 and 3.853 ± 0.003 MeV are reported by (1969NY1A). See also (1959HA1G, 1963MO04, 1964MO1D).

54. (a) ¹⁴N(p, 2p)¹³C Q_m = -7.550
(b) ¹⁴N(e, ep)¹³C Q_m = -7.550

At E_p = 460 MeV, the summed proton spectrum shows three peaks with binding energies 7.5 ± 0.5, 15.3 ± 0.5 and 19.8 ± 0.6 MeV (¹³C* = 0, 7.8 and 12.3 MeV) corresponding to the ejection of p_1/2 protons in the case of the ground state and p_3/2 protons in the case of the two excited states. There is also some indication of other structure (1966TY01). See also (1961CL09, 1962MA1L, 1963CL1B, 1965DE1P, 1965DE21, 1966BE1B), and (1962BA1J, 1962BA1A, 1963EL1C, 1965BA21). For reaction (b) see (1969BA1F).

55. ¹⁴N(d, ³He)¹³C Q_m = -2.056

At E_d = 52 MeV, angular distributions have been measured for the ³He particles to ¹³C*(0, 3.09, 3.68, 6.87, 7.5, 8.85, 9.51, 11.9 ± 0.15) and analyzed by DWBA: J^π = 5/2^-, 1/2^-, 3/2^- and 3/2^-, respectively, are assigned to ¹³C*(7.5, 8.85, 9.51, 11.9) (1968HI01). See also (1969KA1A, 1969KA1W). As expected, angular distributions of ³He and of tritons (from ¹⁴N(d, t)¹³N) to analog states are identically the same: this has been shown for the ground state ³He and triton groups (1966DE1C, 1968GA13; E_d = 28.5 MeV) and for the groups to ¹³C*(8.9 + 9.5) and ¹³N*(9.2) (1968HI01; E_d = 52 MeV). See also (1968BA2J).

56. ¹⁴N(t, α)¹³C Q_m = 12.264

Observed particle groups at E_t = 2.6 MeV are displayed in Table 13.19 (in PDF or PS) (1962SI08). See also (1964SC09) and ¹⁶O in (1971AJ02).

57. ¹⁴N(p, pα)¹³C Q_m = -7.546

This sequential reaction has been studied at E_α = 22.9 MeV (1968KU1C, 1969BA17).

58. (a) ¹⁴N(¹²C, ¹³N)¹³C Q_m = -5.606
(b) ¹⁴N(¹⁴N, ¹⁵O)¹³C Q_m = -0.257

For reaction (a) see (1969VO01) and ¹³N. For reaction (b) see (1966GA04).

59. ¹⁵N(n, t)¹³C Q_m = -9.903

Not reported.

60. ¹⁵N(p, ³He)¹³C Q_m = -10.667

At E_p = 43.7 MeV, ³He groups have been observed to eleven states of ¹³C: see Table 13.19 (in PDF or PS) (1966CE02, 1968FL03). Angular distributions of the ³He particles to these states are generally found to be in agreement with DWBA predictions, using intermediate coupling wave functions to obtain the two-nucleon structure factors (1968FL03). Detailed comparisons are made with the results of the mirror reaction ¹⁵N(p, t)¹³N: the (p, t) transitions are generally stronger than expected relative to the mirror (p, ³He) transitions. This may arise from interference effect terms due to a spin-orbit interaction on the optical potential, or to interference terms between direct-reaction and core-excitation (1968FL02, 1968FL03). See also (1969VA1C).

61. ¹⁵N(d, α)¹³C Q_m = 7.687
Q₀ = 7.675 ± 0.009 (1961LO10).

Observed α-particle groups are displayed in Table 13.20 (in PDF or PS) (1951MA08, 1957WA01, 1961JA23). Angular distributions of α-particles have been measured at E_d = 1.0 to 1.2 MeV (1966ST16; α₀), 20.9 MeV (1968PR04; α₀, α₁) and 21 MeV (1959FI30; α₀). See also (1961LO02, 1965MA59).

62. ¹⁵N(α, ⁶Li)¹³C Q_m = -14.688

At E_α = 42 MeV, the angular distribution of the ⁶Li particles to ¹³C(0) has been measured (1968MI05).

63. ¹⁶O(n, α)¹³C Q_m = -2.215

At E_n = 14.1 to 18.8 MeV angular distributions of α-particles have been measured: see (1961CI01, 1966MC14, 1968LE11; α₀), (1967HS04; α₀, α₁, α₂ + α₃), (1968MA10; α₀, α₁ + α₂), (1968SI06; α₀, α₁ + α₂ + α₃). See also (1959AJ76, 1962RO1G, 1963DA12, 1963MO04, 1963SE08, 1964MA1N, 1964MO1D, 1965CH13, 1965FU1E, 1966CI1A, 1966FA1B, 1967FU1K, 1967SI1E).

64. ¹⁷O(d, ⁶Li)¹³C Q_m = -4.885

See (1966DE09).

65. ¹⁸O(d, ⁷Li)¹³C Q_m = -5.678

See (1963DR1B, 1967DE03).

66. ²⁰Ne(n, 2α)¹³C Q_m = -6.944

See (1966PE08).