13C

Thermal Neutron Capture Evaluated Data



Measurements
1967RA24: 12C(n, γ), E = thermal; measured Eγ; deduced Q.
1968SP01: 12C(n, γ), E = thermal; measured Eγ, Iγ; deduced Q. 13C deduced levels, branchings.
1971JUZS: 12C(n, γ), E = thermal; measured Eγ, Iγ. 13C deduced transitions.
1974SP04: 12C(n, γ); measured Eγ; deduced Q.
1975SM02: 12C(n, γ); measured atomic mass.
1981MUZU: 12C(n, γ), E = thermal; measured σ(capture), ratio.
1982JU01: 12C(n, γ), E = thermal; measured Eγ, Iγ, σ. 13C transitions deduced Iγ.
1982MU14: 12C(n, γ), E = thermal; measured σ(Eγ), Iγ; deduced capture mechanism. 13C levels deduced S.
1999ZHZM: 12C(n, γ), E = thermal; compiled, evaluated prompt γ-ray data.
2000ZHZP: 12C(n, γ), E = thermal; compiled, analyzed prompt Eγ, Iγ.
2002RE13: 12C(n, γ), E = thermal; compiled, analyzed prompt Eγ, Iγ.
2003MOZU: 12C(n, γ), E = thermal; compiled, analyzed k0 factors and capture σ, neutron binding energies.
2004MA76: 12C(n, γ), E = thermal; analyzed data; deduced k0 factors, γ-emission probabilities.
2008FIZZ: 12C(n, γ), E = thermal; measured cross sections; deduced cross section balance.
2011SL01: 12C(n, γ), E = thermal; compiled, evaluated σ, σ(Eγ), γ decay schemes, levels, J, π using ENDF, DICEBOX.
2016FI06: 12C(n, γ), E = thermal; measured Eγ, Iγ, σγ; 13C deduced levels, J, π, absolute transition probabilities, γ-ray cross sections.
Measured total cross section for 12C(n, γ)13C

Recommended value: 3.89 ± 0.06 mb (EGAF)
Measured values: 3.89 ± 0.06 mb (EGAF)
3.53 ± 0.05 mb (2003MUZZ)
3.53 ± 0.07 mb (1982JU01)
3.4 ± 0.3 mb (1973MU14)
3.4 ± 0.3 mb (1964ST25)
3.8 ± 0.8 mb (1963MO1C)
3.3 ± 0.2 mb (1958HU18)

Recommended Values

taken from the Evaluated Gamma-ray Activation File (EGAF) evaluation

 

Eγ (keV) Ei (keV) Ef (keV) σγ Iγ a
3089.057 ± 0.009 3089.451 0 (1.67 ± 0.08) x 10 -5 0.429 ± 0.022
  595.015 ± 0.009 3684.480 3089.451 (9.61 ± 0.40) x 10 -6 0.247 ± 0.011
3683.920 ± 0.009 0 (1.23 ± 0.03) x 10 -3 31.7 ± 0.9  
1261.765 ± 0.009 Capture State 3684.480 (1.25 ± 0.03) x 10 -3 32.2 ± 0.9  
1856.717 ± 0.009 3089.451 (6.27 ± 0.40) x 10 -6 0.161 ± 0.011
4945.301 ± 0.003 0 (2.64 ± 0.05) x 10 -3 67.8 ± 1.7  
a) Iγ: Intensity per 100 neutron captures.

Branching Ratios deduced from

Thermal Neutron Capture γ-decay (EGAF)

 

Eγ (keV) Ei (keV) Ef (keV) Branching Ratio (%)
3089.057 ± 0.009 3089.451 0 100
  595.015 ± 0.009 3684.480 3089.451        0.8
3683.920 ± 0.009 0      99.2
1261.765 ± 0.009 Capture State 3684.480      32.2
1856.717 ± 0.009 3089.451        0.2
4945.301 ± 0.003 0      67.7

Previous Measurements

 

Eγ (keV) Ei (keV) Ef (keV) Iγ (%)
(1982MU14) (1982JU01) (1968SP01) (1967TH05) (1961JA19) (1958GR1B) (1953BA18)
1262 4947 3684 32.36 ± 0.44 31.0 ± 0.4 32 ± 1 34 ± 2 30 25  
1857 3090   0.16 ± 0.01            
4946 0 67.47 ± 0.92 68.6 ± 0.9 68 ± 1 66 ± 3 69 75 70
3089 3684 3090   0.74 ± 0.05            
3682 0 99.3 ± 2.0   32 ± 1 34 ± 2 31 25 30

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Last modified: 12 June 2019