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

GENERAL: See Table 15.1 [Table of Energy Levels] (in PDF or PS) here.

See (1960TA1C, 1962TA1E, 1964LI1B, 1964ST1B, 1967LO03). See also (1969AR13).

1. 15C(β-)15N

Qm = 9.773

The half-life is 2.25 ± 0.05 sec (1956DO37), 2.49 ± 0.07 sec (1964NE09). The β-spectrum is complex. Transitions have been observed both to the ground state and to the upper of the 5.3 MeV levels of ¹⁵N: the latter transition is clearly allowed: see Table 15.2 (in PDF or PS) (1959AL06, 1966AL12, 1969GA05). The ground state transition of ¹⁵N*(5.3) has E_γ = 5.29903 ± 0.00043 MeV (1967CH19); J^π for this state is 1/2⁺ (see Table 15.4 (in PDF or PS)). Thus J^π(¹⁵C) = 1/2⁺ or 3/2⁺ (1959AL06, 1964AL21: see also (1965WA03)). See also (1963KI1B,, 1968ZH1B) and ¹⁵N.

2. 9Be(6He, α)11Be

Qm = 6.343

Eb = 19.076

⁹Be was irradiated with 14 MeV neutrons and the decay of ¹¹Be was observed [⁹Be(n, α)⁶He, followed by the above reaction]: the cross section (which is determined for a large ⁶He energy spread) is 11 ± 10 mb (1967ST21).

3. 9Be(7Li, p)15C

Qm = 9.095

Observed proton groups are listed in Table 15.3 (in PDF or PS) (1957MU99, 1964CA05). τ_m for ¹⁵C*(0.75) is (3.77 ± 0.11) nsec (1968ME08: delayed coincidence technique). Angular distributions of the protons to ¹⁵C*(0, 0.75) are reported at E(⁷Li) = 5.6, 5.8, 6.0, 6.2 MeV by (1969SN02).

4. 14C(d, p)15C

Qm = -1.006

Identification of ¹⁵C_g.s. with ¹⁵N*(11.62), T = 3/2, J^π = 1/2⁺, is suggested by (1956BA16). At E_d = 14.9 MeV, proton groups are observed to the ground state of ¹⁵C and to the levels at 0.75, 3.09, 4.21, 5.94, 6.38 and 7.32 MeV (± 30 keV) (1959MO1B). The angular distribution of ground state protons implies l_n = 0, J^π = 1/2⁺ (1959MO1B: see also (1961PU1B) and ref. ⁹ there, (1964AL21)); for the first excited state, l_n = 2. θ² = 0.093 and 0.032 (1959MO1B), 0.16 and 0.063 (1966GL01) for the ground state and the first excited state, respectively. See also (1967NE06).

The 0.75 MeV level has a mean life of 3.73 ± 0.23 nsec (1962LO02); E_γ = 750 ± 7 keV. The angular distribution of the γ-rays requires J ≥ 5/2. Since the l_n = 2 stripping requires J^π = 3/2⁺ or 5/2⁺, J^π = 5/2⁺ is established (1962CH14). The observed lifetime excludes J > 5/2 (1962LO02). See also (1964NE09, 1965WA03, 1966AL12, 1967CH19).

5. 14C(n, γ)15C

Qm = 1.218

The capture cross section is < 1 μb (1951YA1A).

6. 18O(n, α)15C

Qm = -5.009

See (1966BA1F).

The following reactions leading to ¹⁵C have not been reported:

13C(t, p)15C	Qm = 0.912
14C(t, d)15C	Qm = -5.039
14C(α, 3He)15C	Qm = -19.360
15N(n, p)15C	Qm = -8.990