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## 15C (1991AJ01)

(See Energy Level Diagrams for 15C)

GENERAL: See also (1986AJ01), 2 [Electromagnetic Transitions in A = 13-15] (in PDF or PS) and 15.1 [Table of Energy Levels] (in PDF or PS).

Model calculations:(1988MI1J, 1989PO1K, 1989WO1E).

Electromagnetic transitions:(1984VA06).

Astrophysical questions:(1989KA1K).

Complex reactions involving 15C:(1985PO11, 1986AV1B, 1986BI1A, 1986DU11, 1986HA1P, 1986HA1B, 1986PO06, 1987RI03, 1987SA25, 1987SN01, 1987VI02, 1988CA06, 1988JO1B, 1988MI28, 1988RU01, 1988SA19, 1989AS1B, 1989OG1B, 1989SA10, 1989SI26, 1989YO02).

Hypernuclei:(1988MA1G, 1989TA17).

Other topics:(1985AN28, 1986AN07).

Ground state of 15C:(1985AN28, 1986AS1B, 1987SA15, 1987VA26, 1988VA03, 1989SA10, 1989WO1E).

|g| = 2.63 ± 0.14 (1988ASZY; prelim.)
μg.s. = 1.315 ± 0.07 nm (1989RA17)
μ0.74 = -1.758 ± 0.03 nm (1989RA17)

 1. 15C(β-)15N Qm = 9.7717

The half-life of 15C is 2.449 ± 0.005 s (1979AL23). Transitions have been observed to 15Ng.s. and to the upper of the 5.3 MeV states in 15N which has Jπ = 1/2+. The log ft to 15N*(5.30) indicates an allowed transition: therefore Jπ (15Cg.s.) = 1/2+ or 3/2+. Weak transitions are observed to 15N*(7.30, 8.31, 8.57, 9.05) (1979AL23): see 15.14 (in PDF or PS). The shape of the 15Cg.s.15Ng.s. transition differs appreciably from an allowed shape (1984WA07). See also (1986AS1B, 1988ASZY), (1988WA1E) and (1989BA92, 1989PO1K; theor.).

 2. 9Be(7Li, p)15C Qm = 9.092

Observed proton groups are displayed in 15.2 (in PDF or PS).

 3. 13C(t, p)15C Qm = 0.9127

Observed groups are displayed in 15.3 (in PDF or PS). See also (1981AJ01).

 4. 13C(α, 2p)15C Qm = -18.9013

See (1981AJ01).

 5. 14C(n, γ)15C Qm = 1.2181

σγ < 1 μb (1981MUZQ).

 6. 14C(d, p)15C Qm = -1.0065

At Epol. d = 16 MeV angular distributions and Ay measurements are reported to a state at Ex = 4.78 ± 0.10 MeV (Γc.m. = 1.74 ± 0.40 MeV); S = 0.5. A narrow state at Ex = 5.81 ± 0.02 MeV (Γc.m. = 64.3 ± 8.1 keV), S = 0.02, is also observed. It is suggested that these are 1p2h and 3p4h 3/2+ states (1985DA23) [and S.E. Darden, private communication]. For the earlier work see 15.2 (in PDF or PS).

 7. 14C(13C, 12C)15C Qm = -3.7283

Angular distributions have been studied at E(13C) = 20.0 to 27.5 MeV to 15C*(0, 0.74) (1988BI11). See also (1990VO1E).

 8. 15N(π-, γ)15C Qm = 129.797

Radiative pion capture shows evidence for Jπ = 5/2+, T = 3/2 giant magnetic quadrupole states: transitions are reported to 15C*(0.74) as well as to 15C*(6.7, 8.6, 12.0) (1983ST04).

 9. 16O(7Li, 8B)15C Qm = -22.624

At E(7Li) = 82 MeV 15C*(0, 3.1) are populated (1985AL1G).