A=13N (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

¹³N (1970AJ04)

(See Energy Level Diagrams for ¹³N)

GENERAL: See Table 13.21 [Table of Energy Levels] (in PDF or PS).

Model calculations: (1955LA1A, 1957HU1C, 1959BA1D, 1960PH1A, 1960TA1C, 1961KU17, 1961KU1C, 1961NE1B, 1962IN02, 1962TA1E, 1963BA43, 1963BO1G, 1963SE19, 1963TR02, 1964AM1D, 1964BO1K, 1964ST1B, 1965BO1N, 1965MA1T, 1965ME1C, 1965WE1D, 1966EL08, 1966HA18, 1966NO1B, 1967BR1Q, 1967FA1A, 1967HU1C, 1967KU1E, 1967NE1D, 1967PO1J, 1967WA1C, 1968FI1F, 1968GO01, 1968HO1H, 1969VA1C, 1969ZU1B).

Other: (1967AU1B, 1967EP1A, 1968BA2N, 1968BA2F, 1968VO1C, 1969AU1D, 1969AR1G, 1969BL1G, 1969FO1D, 1969HA1G, 1969HE1N, 1969MC1C, 1969VA1C).

Ground state: J = 1/2 (1961SN01). μ = -0.32212 ± 0.00035 nm (1964BE24). See also (1961PO09, 1964LI14, 1967CO1D, 1967SH14, 1968RO1E, 1969FU11, 1969NO1E, 1969SU15, 1969VA1C).

1. ¹³N(β⁺)¹³C Q_m = 2.221

Measured values of the half-life are displayed in Table 13.22 (in PDF or PS). The positon spectrum shows no deviation from the allowed shape: it is concluded that the Fierz coefficient in the Fermi interaction is < 11% (1957DA08, 1958DA09, 1968DA1J). log ft = 3.664 based on Q_m and τ_1/2 = 9.961 min. The positon polarization has been studied by (1957BO65, 1957HA27). The results indicate that the positons are completely polarized and hence that Fermi transitions as well as GT transitions exhibit the maximum effect of parity non-conservation. See also (1959AJ76) and (1965GA1D, 1966MI1F, 1967AM1H, 1969LE1D, 1969SU15).

2. ⁷Li(⁶Li, 2n)¹¹C Q_m = 2.204 E_b = 23.651

See (1960NO1A).

3. ⁹Be(⁶Li, 2n)¹³N Q_m = 3.951

See (1957NO17).

4. ¹⁰B(³He, n)¹²N Q_m = 1.563 E_b = 21.638

The cross section has been measured for E(³He) = 1 to 6.3 MeV. There is some evidence of broad structures (1963PE10). See also (1966ZA01) and ¹²N in (1968AJ02).

5. ¹⁰B(³He, p)¹²C Q_m = 19.695 E_b = 21.638

Observed resonances in the yields of proton groups and γ-rays for E(³He) = 1.2 to 12 MeV are displayed in Table 13.23 (in PDF or PS) (1956SC01, 1964KU09, 1966PA10). For polarization measurements see (1965SI05, 1967SI05) and (1966MI1E). See also ¹²C in (1968AJ02).

6. ¹⁰B(³He, d)¹¹C Q_m = 3.199 E_b = 21.638

Excitation functions for the ground state group have been measured for E(³He) = 3.5 to 10 MeV: a resonance reported at E(³He) ≈ 5.8 MeV (1965PA10). See also (1965BR42, 1967HA20). See also ¹¹C in (1968AJ02).

7. ¹⁰B(³He, t)¹⁰C Q_m = -3.624 E_b = 21.638

The excitation function for ¹⁰C production has been measured from threshold to E(³He) = 10.5 MeV. σ_max (at 10.5 MeV) = 435 ± 87 μb. No detailed structure is observed (1964OS1A). See also (1966MA36).

8. ¹⁰B(³He, α)⁹B Q_m = 12.140 E_b = 21.638

The excitation function for α-particles to ⁹B(0), measured for E(³He) = 2 to 10 MeV, indicates a strong resonance at E(³He) = 5.8 MeV (¹³N* = 26.1), Γ ≈ 1 MeV. This resonance does not appear in the excitation function for alphas to ⁹B*(2.3) measured over the same energy range. Minor structure is observed in both excitation functions approximately 2 MeV (1965PA05). See also ⁹B in (1966LA04) and (1968TA1M).

9. ¹⁰B(α, n)¹³N Q_m = 1.060

See (1959AJ76) and (1959HE1B, 1960KA13, 1961RO21, 1962ED01, 1965NI1B, 1966ZA01).

10. ¹⁰B(⁶Li, t)¹³N Q_m = 5.845

At E(⁶Li) = 4.9 MeV, triton groups are observed to ¹³N*(0, 2.4, 3.6 [u], 6.38) [u = unresolved] (1966MC05). See also (1963MO1B, 1965CA05).

11. ¹¹B(³He, n)¹³N Q_m = 10.182

Ground state angular distributions have been measured for E(³He) = 2.0 to 5.3 MeV (1966DI04) and 4.7, 6.1 and 6.5 MeV (1969HO1F). Angular distributions at the latter energies of the neutrons corresponding to ¹³N*(3.51, 7.39, 9.52, 10.36, 11.87) indicate, respectively, L = (0, 2), (2, 4), (0, 2), (2, 4), (0, 2), in agreement with the J^π assignments in Table 13.19 (in PDF or PS) (1969HO1F). Work at E(³He) = 1.2 to 2.0 MeV has shown tht previously reported states at E_x = 5.51 and 6.10 MeV in the ¹¹B(³He, p)¹³C reaction are instead due to the proton decay to ¹²C(0) of ¹³N states at E_x = 9.52 ± 0.02 and 10.35 ± 0.02 MeV (1966CH18).

In a study with E(³He) = 7.0 to 13.5 MeV, neutron groups have been observed to T = 3/2 states at E_x = 15.068 ± 0.008 MeV (Γ < 15 keV), 18.44 ± 0.04 MeV and 18.98 ± 0.02 MeV (Γ = 40 ± 20 keV). J^π (determined by DWBA) for ¹³N*(15.07) is 3/2^- (1969AD02). The proton and γ-decay widths of ¹³N*(15.07) are displayed in Table 13.8 (in PDF or PS) where they are compared with the corresponding quantities for ¹³C*(15.11) (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, states depend on T_Z (1969AD01). See also (1964BR13, 1967TI1B, 1969MC1C).

12. (a) ¹²C(p, γ)¹³N Q_m = 1.944
(b) ¹²C(p, γp')¹²C

Resonances for capture radiation displayed in Table 13.24 (in PDF or PS). [See also Table 13.17 (in PDF or PS) for a summary of the total radiation widths of low-lying levels of ¹³C - ¹³N.] No resonance is observed at E_p = 1.73 MeV, corresponding to ¹³N*(3.56) (1951SE67, 1963YO06).

No capture radiation is observed for E_x = 5 to 10.4 MeV: the upper limits to the (p, γ₀) cross sections are 2 mb/sr at the known (p, p) resonances (1962PA07). At E_p = 14.2 MeV, capture radiation from the first T = 3/2 state at E_x = 15.07 MeV is observed. Γ_pΓ_γ/Γ = 5.5 ± 0.8 eV for the ground state transition which, combined with Γ_p/Γ = 0.20 ± 0.025 from (1969AD01), yields Γ_γ = 27 ± 5 eV. The amplitude ratio of E2/M1 = -0.095 ± 0.07. For the transitions to ¹³N*(2.37) and ¹³N*(3.51+3.56), Γ_γ < 4.5 and 23 ± 5 eV, respectively. The angular distributions of the γ-rays determine J = 3/2 for ¹³N*(15.07) (1968DI04). No clear structure is observed in the ground state capture cross section for E_p = 14 to 19.5 MeV (1962WA31). Resonances reported by (1963FI07) in the yields of γ₀ and γ₂ are displayed in Table 13.22 (in PDF or PS). See also (1964TA05).

The capture cross section at low energy is of interest in connection with stellar energy generation: see (1959AJ76) and (1959CA1A, 1964FO1A, 1966BA2P, 1967FO1B).

In the range E_p = 1.2 to 2.5 MeV, reaction (b) is observed, involving a γ-transition to the 2.37 MeV state. p-wave resonant capture at E_p = 1.70 MeV, with Γ_γ = 0.04 eV, interferes with direct p-wave capture (1954WO09). See also (1959DE28, 1959SU55, 1963CA09, 1964AL1J, 1965FA1E, 1965MA1H, 1966ED1A, 1968TH1K).

13. ¹²C(p, n)¹²N Q_m = -18.131 E_b = 1.944

The cross section for this reaction has been measured from threshold to E_p = 50 MeV. Resonant structure is observed corresponding to E_x = 21, 24 and, possibly, ≈ 27 MeV (1968RI01). See also (1963VA1C, 1966SP09) and ¹²N in (1968AJ02).

14. ¹²C(p, pn)¹¹C Q_m = -18.720 E_b = 1.944

Cross sections have been measured to E_p = 385 MeV: see (1962AU1A, 1963CU05, 1964KA31, 1966ME01, 1968AN02) and (1959AJ76). See also (1963VA1C, 1969KO1P).

15. (a) ¹²C(p, p)¹²C E_b = 1.944
(b) ¹²C(p, p')¹²C*
(c) ¹²C(p, 2p)¹¹B Q_m = -15.957

Yield curves for elastic protons, protons inelastically scattered to ¹²C*(4.4, 7.7, 9.6, 12.7, 15.1), and for γ-rays from ¹²C*(12.7) and (15.1) have been studied at many energies up to E_p = 48.5 MeV: see Table 13.25 (in PDF or PS) for a display of the characteristics of the observed structure.

Total reaction cross section measurements have been made at E_p = 10 - 19 MeV (1968DI1D), 16.4 (1965PO07), 16.2 to 28 (1965MA26), 20 and 42 (1964GI05), 24.5 to 46.1 (1967MC1E), 28 (1964MA59), 34 (1959GO90), 45 (1967CA1K), 60 (1969ME08), 61 (1960ME16), 142 (1961TA06), 180 MeV (1961JO17) and 1 GeV (1967IG1A). Non-elastic cross sections have been measured at E_p = 9.9 and 10.2 MeV (1962IG1A, 1963WI12) and at 77, 95, 113 and 133 MeV (1962GO02).

The (p, 2p) cross section has been determined at E_p = 120 to 150 MeV (1962AU1A) and that of the ¹²C(p, p')⁴He⁴He⁴He at 90 MeV (1961GA07). See also (1962WA31, 1966KI1D, 1967BE2D, 1967WA1H).

A summary showing the energies at which polarization measurements have been made is presented as Table 13.26 (in PDF or PS). Reviews of the experimental evidence are given by (1959PH37, 1962RO14, 1966DA1B, 1966RO1R, 1966RO1B). See also (1959AJ76) and (1966KI1D).

The polarization and asymmetry in the elastic scattering of 32.9 MeV protons are equal to within ≈ 1%: therefore no violation of time-reversal invariance is observed in that part of the nuclear force which flips the spin of the proton (1968GR1K, 1969MA2D).

The following is a list of recent theoretical papers bearing on these reactions: (1955DE50, 1958BE1B, 1959BA24, 1959KE1A, 1959PU1A, 1959RI1A, 1959WI1C, 1960NI02, 1960SA1E, 1960SA1G, 1961SA1B, 1962MA1M, 1962NO04, 1962NO03, 1962NO1D, 1962RO1F, 1962VO04, 1963BA43, 1963HO1D, 1963LO1A, 1963LU1C, 1963RO1G, 1963SC1C, 1964CR1B, 1964GR1E, 1964IY1A, 1964TA1E, 1964VE1A, 1965BA1M, 1965BE1K, 1965CL1E, 1965FA1E, 1965HA28, 1965PE1F, 1965SA1H, 1966BA2N, 1967BA1C, 1967MC1H, 1967SA1C, 1967TA1B, 1967WO1E, 1968BA1K, 1968CH35, 1968FA1H, 1968KO26, 1968TA1U, 1968TI1B, 1969HA2C, 1969KO1J, 1969PA1H, 1969TA1D).

For discussion of spallation measurements, see (1965ZO1A, 1967AU1A, 1967GR1K, 1967LI1B, 1968JA1M, 1968JU1B, 1969DA1M, 1969DA1N).

See also ¹²C in (1968AJ02).

16. ¹²C(p, d)¹¹C Q_m = -16.495 E_b = 1.944

The yield has been measured for E_p = 18 to 19.8 MeV: no structure is observed (1962WA31). Polarization measurements are reported by (1960CO05, 1967CH15, 1968IN02, 1969IN1C). See also ¹¹C in (1968AJ02) and (1969BO1J, 1969ED02, 1969KO1P).

17. ¹²C(p, t)¹⁰C Q_m = -23.319 E_b = 1.944

See (1967CO23, 1967ME23) and ¹⁰C in (1966LA04).

18. ¹²C(p, α)⁹Be Q_m = -7.554 E_b = 1.944

Yield curves for α₀ have been measured over the 14.2 MeV resonance, corresponding to the first T = 3/2 state at E_x = 15.07 MeV, and from E_p = 17 to 20 MeV. The yield for the α₁ group has been determined for E_p = 17 to 21.5 MeV. Parameters of observed resonances are displayed in Table 13.25 (in PDF or PS) (1969LE18). See also (1963VA1C, 1964BA29, 1966BA35, 1966RE1D, 1968TE1C) and ⁹B in (1966LA04).

19. (a) ¹²C(d, n)¹³N Q_m = -0.281
(b) ¹²C(d, pn)¹²C Q_m = -2.225

Measurements of angular distributions of neutrons are tabulated in Table 13.27 (in PDF or PS). See also ¹⁴N.

In the range E_d = 2.8 to 3.7 MeV, a single neutron threshold is observed at E_d = 3.09 ± 0.02 MeV, corresponding to ¹³N* = 2.36 (5) ± 0.02 MeV (1955MA76).

At E_d = 4.7 to 5.5 MeV, broad proton groups are reported from the sequential decay ¹²C + d → ¹⁴N* → ¹³N* + n → ¹²C + n + p via ¹³N*(3.51, 3.56) (1963PI04). The proximity scattering associated with this process is charaterized by a mean lifetime for the intermediate state of 0.7 × 10^-20 sec (1965LA08, 1965LA1F, 1966LA18). See also (1968BO02, 1969SA1K).

20. (a) ¹²C(³He, d)¹³N Q_m = -3.550
(b) ¹²C(³He, pd)¹²C Q_m = -5.494

Angular distributions of deuterons to ¹³N(0) have been measured at E(³He) = 6.0, 8.8, 9.4 and 10.1 MeV (1960HI07; d₀), at 13.9 MeV (1960PR12; d₀), at 16, 17 and 18 MeV (1969FO02; d₀, d₁, d₂₊₃), at 19 MeV (1969FO02; d₄, d₅, d₆, d₇), at 21.6 and 24.7 MeV (1960WE04; d₀, d₁, d₂₊₃), and at 29 MeV (1962GA17; d₀, d₁, d₂₊₃). See also (1952FR1A, 1961YN02, 1966EC1B, 1966HA1Q, 1967HA21, 1967HO14, 1969FO02). For reaction (b) see (1969FO02).

21. ¹²C(α, t)¹³N Q_m = -17.870

Angular distributions have been measured at E_α = 43 MeV (1967DE1K; t₀), 46 MeV (1969FO1C; t₂ + t₃) and at 56 MeV (1968GA1C, 1969GA11; t₀). At E_α = 56 MeV a detailed comparison is made with the ³He distribution from the mirror reaction ¹²C(α, ³He)¹³C (1969GA11). See also (1961YN02, 1963TR1A, 1964SH1C).

22. ¹²C(¹⁰B, ⁹Be)¹³N Q_m = -4.644

At E(¹⁰B) = 105 MeV, the ground state of ¹³N and ¹³N*(3.5 [u]) are observed (1965SA07). See also (1963GR1H, 1965GR1F, 1969BR1D).

23. ¹²C(¹¹B, ¹⁰Be)¹³N Q_m = -9.285

At E(¹¹B) = 116 MeV, the ground state of ¹³N and ¹³N*(3.5 [u]) are observed (1965SA07, 1967PO13). See also (1965DA1E, 1965GR1F, 1969BR1D).

24. ¹²C(¹²C, ¹¹B)¹³N Q_m = -14.013

See (1962CH01, 1969BR1D).

25. ¹²C(¹⁴N, ¹³C)¹³N Q_m = -5.606

See (1967BI1F, 1969BR1D, 1969DO07).

26. ¹³C(p, n)¹³N Q_m = -3.003
E_thresh. = 3.2353 ± 0.0015 (1961BE13);
E_thresh. = 3.2371 ± 0.0016 (1961BE13): see (1964BO10);
E_thresh. = 3.2354 ± 0.0024 (1966BO20);
E_thresh. = 3.2357 ± 0.0007 (recommended by (1966MA60)).

Angular distributions of ground state neutrons have been measured at E_p = 3.1 to 5.3 MeV (1961AL07), 3.39 to 12.86 MeV (1961DA09), 5.0 to 13.3 MeV (1961WO03) and 18.5 MeV (1964AN1B). See also (1962PA07, 1964ST1C, 1965VA23) and (1959BL1B, 1963EL1B, 1964CA1F, 1964SA1D, 1966PA1H).

Two thresholds are observed at E_p = 3.235 and 6.965 MeV (± 10 keV), corresponding to ¹³N(0) and ¹³N*(3.464) (1966RI09). The neutron group corresponding to ¹³N*(2.3) is very weak compared to the groups to ¹³N(0) and ¹³N*(3.5) at the energies studied (1961DA09). See also (1959AJ76), (1959BO14, 1966UN1A, 1968AT1A, 1968LI1G, 1968RI1Q, 1968WO1D, 1969PA1J) and ¹⁴N.

27. ¹³C(³He, t)¹³N Q_m = -2.239

At E(³He) = 39.6 MeV, angular distributions have been obtained for the tritons corresponding to the ground state of ¹³N and to the excited states at 2.37, 3.53 ± 0.03 [u], 6.38, 7.17, 7.39, 8.92 ± 0.04, 11.85 ± 0.04 and 15.07 MeV. States at E_x = 9.5, 10.78 ± 0.04 and 15.98 ± 0.05 MeV were also populated, the first of these weakly. The transitions to ¹³N*(7.39, 8.92, 11.85, 15.07) are L = 2 [J^π = 5/2^-, 1/2^-, 3/2^-, 3/2^-, respectively] (1968BA1E, 1969BA06). See also (1966EC1B).

28. ¹⁴N(γ, n)¹³N Q_m = -10.553

See (1963FU06) and ¹⁴N.

29. (a) ¹⁴N(p, d)¹³N Q_m = -8.329
(b) ¹⁴N(p, pn)¹³N Q_m = -10.553

Angular distributions have been determined at E_p = 14 MeV (1969CU1D; d₀), 18.5 MeV (1961BE12; d₀, d₁, d₂₊₃), 30.3 MeV (1967KO08; d₀, d₂, and the deuterons to ¹³N*(7.38, 8.93, 11.80)), 45 MeV (1966MA2B; d₀, d₁, d₂₊₃, and the deuterons to ¹³N*(7.4 ± 0.1, 11.8 ± 0.2)) and 155.6 MeV (1966BA44; d₀, d₂₊₃, and the deuterons to ¹³N*(7.4, 9.0, 11.9)). See also (1964EL1B, 1967OG1A, 1969DO08, 1969TO1A). For reaction (b), see (1962BA1A). See also ¹⁴N.

30. ¹⁴N(d, t)¹³N Q_m = -4.296

Angular distributions of the tritons to ¹³N*(0, 3.51, 7.38, 8.93 + 9.48, 11.8) have been obtained at E_d = 52 MeV and analyzed by DWBA. The spectroscopic factors for the ¹³N states [and the mirror states reached in the ¹⁴N(d, ³He)¹³C reaction] are in good agreement with theory and are additional evidence for the J^π assignments of 1/2^-, 3/2^-, 5/2^-, 1/2^-, 3/2^- and 3/2^- to these states (1968HI01). Comparisons of (d, t) and (d, ³He) angular distributions are also reported by (1966DE1C, 1968GA13).

31. (a) ¹⁴N(³He, α)¹³N Q_m = 10.025
(b) ¹⁴N(³He, pα)¹²C Q_m = 8.081
Q₀ = 10.015 ± 0.010 (1959YO25).

Alpha-particle groups have been observed to the ground state of ¹³N and to excited states at 2.358 ± 0.010, 3.471 ± 0.015 MeV (1960TA12), 6.38, 6.91, 7.166 ± 0.008 and 7.388 ± 0.008 MeV (1962CL12). See also (1963GA03). Angular distributions have been studied at E(³He) = 4.5, 5.5 and 7.0 MeV (1967KN1B; α₀, α₁, α₂₊₃), 13.9 MeV (1968LU03; α₀, α₁, α₂₊₃, α₄, α₆₊₇), 17.4 to 36.6 MeV (1965AR07; α₀, α₁, α₂₊₃, α₅₊₆ and the alphas to ¹³N*(11.4)), 29 MeV (1962SE13; α₀), and at 40 - 45 MeV (1967BA2G). For reaction (b) see (1967DE1T). See also (1964EL1B, 1965BO1N, 1966BO1U, 1967BE22, 1967OG1A, 1968ZE1B, 1969DO08).

32. ¹⁴N(¹²C, ¹³C)¹³N Q_m = -5.606

As expected from isospin conservation the angular distributions (at E(¹⁴N) = 78 MeV) of ¹³N and ¹³C are symmetric about 90° (1969VO01).

33. ¹⁴N(¹⁴N, ¹⁵N)¹³N Q_m = 0.282

See (1968NA1F, 1969BR1D, 1969KA1G).

34. ¹⁵N(p, t)¹³N Q_m = -12.906

At E_p = 43.7 MeV, angular distributions have been obtained for the tritons corresponding to the ground state of ¹³N and the excited states at 3.51 (3/2^-), 6.38 ± 0.03 (5/2⁺), 7.38 (5/2^-), 8.93 ± 0.05 (1/2^-), 10.78 ± 0.06 (1/2^-), 11.88 ± 0.04 (3/2^-) and 15.07 (3/2^-; T = 3/2) MeV states [J^π values in parentheses, as determined by DWBA analyses using intermediate-coupling wave functions to obtain the twwo-nucleon structure factors] (1968FL03). Detailed comparisons have been made with the (p, ³He) reaction to the mirror states in ¹³C (1968FL02, 1968FL03). See also (1966CE02, 1966CE05) and (1969VA1C).

35. ¹⁶O(γ, t)¹³N Q_m = -25.032

See (1965BU1F, 1968BU1D).

36. (a) ¹⁶O(p, α)¹³N Q_m = -5.218
(b) ¹⁶O(p, pα)¹²C Q_m = -7.161
Q₀ = -5.206 ± 0.010 (1960WH03).

Angular distributions of the ground state α-particles have been measured at E_p = 7.9 to 10.2 MeV (1964DA02), 13.5 to 18.1 MeV (1961MA15) and 38 MeV (1969GA03, 1967AC01). See also (1962VA1A, 1964CE1D), (1957CH1A, 1961WI1F, 1964HO1D) and ¹⁷F in (1971AJ02). For reaction (b), see (1967CH04).

37. ¹⁶O(³He, ⁶Li)¹³N Q_m = -9.239

At E(³He) = 65.3 MeV, ⁶Li groups are observed to ¹³N*(0, 3.6 [u], 6.4, 7.4) (1966CE02). See also (1969OH1B).

38. ¹⁸O(d, ⁷Li)¹³N Q_m = -7.899

See (1966DA1C).