Information on mass chains and nuclides

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GENERAL: See also (1981AJ01) and Table 13.1 [Table of Energy Levels] (in PDF or PS).

Model calculations: (1981SE06, 1984VA06).

Complex reactions involving ¹³B: (1983EN04, 1983MA06, 1983OL1A, 1983WI1A, 1984HI1A).

Muon and neutrino capture and reactions: (1984KO1U).

Pion capture and reactions (See also reactions 4 and 5.): (1981OS04, 1982CH16, 1983LI15).

Hypernuclei: (1983FE07).

Other topics: (1981SE06, 1981WA1J, 1982NG01, 1984PO11).

Ground-state properties of ¹³B: (1980FU1G, 1982NG01, 1983ANZQ, 1984KU07).

Mass of ¹³B: From the Q₀ of the ¹¹B(t, p)¹³B reaction [-233.4 ± 1.0 keV], the atomic mass excess of ¹³B is 16561.3 ± 1.4 keV.

1. 13B(β-)13C

Qm = 13.436

The half-life of ¹³B is 17.36 ± 0.16 msec: see (1981AJ01). The branching ratios to various ¹³C states are shown in Table 13.2 (in PDF or PS): they indicate J^π = 1/2^- or 3/2^- for ¹³B_g.s.. See also (1981KO27; theor.).

2. 7Li(7Li, p)13B

Qm = 5.963

Observed proton and γ-ray groups are shown in Table 13.3 (in PDF or PS). See also ¹⁴C.

3. 11B(t, p)13B	Qm = -0.2324
	Q0 = -233.36 ± 1.00 keV (1983AN1Q).

Observed proton groups are displayed in Table 13.3 (in PDF or PS).

4. 13C(γ, π+)13B

Qm = -153.004

Differential cross sections have been measured to ¹³B_g.s. (E_π⁺ = 18, 29, 42 MeV) and the unresolved structure at E_x ≈ 3.5 - 3.7 MeV (E_π⁺ = 42 MeV) (1982LE26) and to ¹³B_g.s. (1983SH01; E_γ = 194 MeV, E_π⁺ ≈ 40 MeV) [see the latter for a discussion of the comparison of the results with DWIA]. At E_e = 195 MeV the ¹³B E_x region to 12 MeV has been studied by (1983MI06): they find that the photopion reaction predominantly excites M2 states at low q and M4 states at high q. Fits to the data are obtained by assuming the excitation of ¹³B_g.s. and ¹³B*(3.5, 6.4, 9.0) [the latter are clearly due to unresolved groupings of levels]. Comparisons are made with the ¹³C(e, e') work in the analog region in ¹³C (1983MI06). [For T = 3/2 states see Table 13.6 (in PDF or PS).] See also reaction 43 in ¹³C and the "GENERAL" section here.

5. 13C(n, p)13B

Qm = -12.654

See (1985FO1C, 1985FO1D).

6. 13C(π-, γ)13B

Qm = 126.131

Gamma rays have been observed which are associated with the ¹³B ground state; an unresolved doublet at E_x ≈ 3.5 - 3.7 MeV; sharp states at E_x ≈ 6.5 and 7.6 MeV; a broad level (or unresolved levels) at ≈ 10.2 MeV (1983MA16; see for radiative capture branching ratios). The analogs of the peaks at E_x = 6.5, 7.6 and 10.2 MeV, calculated to be at ¹³C*(21.6, 22.7, 25.3), are attributed to a ΔL = 1, ΔS = 1, ΔT = 1 spin-isospin giant dipole resonance of ¹³C (1983MA16). See also the "GENERAL" section here.

7. 13C(7Li, 7Be)13B

Qm = -14.298

See (1982AL1G, 1984GL1G; E(⁷Li) = 78 MeV).

8. 14C(d, 3He)13B

Qm = -15.337

See (1981AJ01).

9. 14C(t, α)13B

Qm = -1.016

At E_t = 23 MeV the angular distribution for α ₀ has been analyzed by (1979SE07): the DWBA fit is poor. The extracted S(3/2) = 5.7, near that predicted for a filled p_3/2 shell.

10. 18O(d, 7Be)13B

Qm = -19.976

See (1984NE1A).