10Be

Thermal Neutron Capture Evaluated Data

Measurements
1967OR03: 9Be(n, γ), E = thermal; measured Eγ, Iγ; deduced Q. 10Be deduced transitions. Ge(Li) detectors.
1967RA24: 9Be(n, γ), E = thermal; measured Eγ; deduced Q.
1968GRZY: 9Be(n, γ), E = thermal; measured Eγ, deduced Q. Ge(Li) detector.
1969WE10: 9Be(n, γ), E = thermal; measured σ(Eγ). 10Be transition deduced no Doppler broadening.
1974JUZW: 9Be(n, γ), E = thermal; measured Eγ, Ig; deduced σ. 10Be deduced transitions.
1980IS02: 9Be(n, γ), E thermal; measured Eγ, Ig. 10Be deduced Q, neutron binding energy.
1985MU03: 9Be(n, γ), E = thermal; analyzed E1 transitions following capture; deduced spin-spin potential parameters. 10Be levels deduced spectroscopic amplitudes, phases. Direct capture model.
1986CO14: 9Be(n, γ), E = thermal; measured Eγ, Ig; deduced capture s relative to 14N(n, g). Pair spectrometer, NaI(Tl), Ge detectors.
1986KE14: E = reactor; measured γ-spectra following capture. 10Be levels deduced Ig.
1987LY01: 9Be(n, γ), E = thermal; calculated capture σ. Optical model, Lane-Lynn-Raman method.
1999ZHZM, 2000ZHZP: 9Be(n, γ), E = thermal; compiled, evaluated prompt γ-ray data.
2002RE13: 9Be(n, γ), E = thermal; compiled, analyzed prompt Eγ, Ig.
2003MOZU: 9Be(n, γ), compiled, analyzed capture σ, neutron binding energies.
2008FIZZ: 9Be(n, γ), E = thermal; measured cross sections; deduced cross section balance.
2011SL01: 9Be(n, γ), E = thermal; compiled, evaluated σ, σ(Eγ), γ decay schemes, levels, J, π using ENDF, DICEBOX.
EGAF: 9Be(n, γ), measured, evaluated neutron capture reactions.
2016FI06: 9Be(n, γ), E = thermal; measured Eγ, Iγ, σγ; 10Be deduced levels, J, π, absolute transition probabilities, γ-ray cross sections.
2019WA02: 9Be(n, γ), kT=thermal, 5-100 keV; measured Maxwellian averaged σ(E) using neutron activation combined with accelerator mass spectrometry (AMS) technique; deduced 10Be/9Be ratio in irradiated sample.
2020MA53: 9Be(n, γ), E=thermal; measured isotopic concentrations of the reaction products; deduced capture cross sections. Comparison with previous experimental results and data in evaluations.
2021KAZZ: 9Be(n, γ), E ≈ 25 keV; analyzed available data; deduced corrected σ.
Measured total cross section for 9Be(n, γ)10Be

Recommended value: 8.77 ± 0.35 mb (2003MUZZ)
Measured values: 8.8 ± 0.6 mb (EGAF)
8.77 ± 0.35 mb (2003MUZZ)
8.49 ± 0.34 mb (1986CO14)
7.6 ± 0.8 mb (1981MUZQ)
9.2 ± 1.0 mb (1973MU14)
Recommended Values

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

 
Eγ (keV) Ei (keV) Ef (keV) σγ Iγ a
3367.448 ± 0.025   3368.056 0 (2.85 ± 0.22) x 10 -3 32.4 ± 3.3  
2590.014 ± 0.019 5958.43 3368.056 (1.91 ± 0.15) x 10 -3 21.7 ± 2.3  
5956.53 ± 0.03 0 (1.46 ± 0.12) x 10 -4 1.66 ± 0.18
5958.85 ± 0.12 5960.76 0     (6.8 ± 0.8) x 10 -6 0.077 ± 0.011
  219.40 ± 0.10 6180.16 5960.76       (4.5 ± 0.6) x 10 -6 0.051 ± 0.008
2811.68 ± 0.05 3368.056 (1.05 ± 0.12) x 10 -5 0.119 ± 0.016
  304.24 ± 0.13 6264.53 5960.76       (2.3 ± 0.5) x 10 -6 0.026 ± 0.006
2896.02 ± 0.04 3368.056 (1.16 ± 0.13) x 10 -5 0.132 ± 0.017
  547.55 ± 0.04 Capture State 6264.53   (1.09 ± 0.10) x 10 -5 0.124 ± 0.014
  631.92 ± 0.04 6180.16       (1.8 ± 0.4) x 10 -5 0.205 ± 0.048
  853.630 ± 0.012 5958.47   (2.08 ± 0.24) x 10 -3 23.6 ± 3.2  
3443.406 ± 0.02   3368.056     (9.8 ± 0.7) x 10 -4 11.1 ± 1.1  
6809.61 ± 0.03 0     (5.8 ± 0.5) x 10 -3 65.9 ± 7.2  
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 (%)
3367.448 ± 0.025   3368.056 0 100  
2590.014 ± 0.019 5958.43 3368.056    92.9
5956.53 ± 0.03 0      7.1
5958.85 ± 0.12 5960.76 0 100  
  219.40 ± 0.10 6180.16 5960.76   30
2811.68 ± 0.05 3368.056 70
  304.24 ± 0.13 6264.53 5960.76      16.5
2896.02 ± 0.04 3368.056    83.5
  547.55 ± 0.04 Capture State 6264.53        0.1
  631.92 ± 0.04 6180.16        0.2
  853.630 ± 0.012 5958.47      23.4
3443.406 ± 0.02   3368.056    11.0
6809.61 ± 0.03 0    65.2
Previous Measurements

 
Eγ (keV) Ei (keV) Ef (keV) Iγ (%)
(1986KO19) (1979JUZU)
Renormalized by (1986KO19)		 (1979JUZU) (1974JUZW) (1960BA01, 1963DR02) (1961JA19) (1963DR02)
  547 6812 6263       0.16 ± 0.03 0.16 ± 0.03      
  631 6179       0.24 ± 0.03 0.24 ± 0.03      
  854 5958 23.5 ± 1.1 23.1 26.4 ± 2.6  26 ± 2.6    29.4 16 24
3443 3368 10.6 ± 0.2 11.4 11.4 ± 1.1 11.6 ± 1.1   11 15 11
6810 0 65.5 ± 1.1 65.1 64.6 ± 6.6 63.8 ± 6.5   62 70 65
2896 6263 3368       0.15 ± 0.03 0.15 ± 0.03      
  219 6179 5958       0.05 ± 0.01 0.05 ± 0.01      
2811 3368       0.13 ± 0.03 0.13 ± 0.03      
2590 5958 3368 22.6 ± 0.4 22.6 22.4 ± 2.6 23.3 ± 2.7   28 17 21
5956 0   1.49 ± 0.05     1.51   1.5 ± 0.3 1.75 ± 0.32      1.4   2 ≤ 2  
3367 3368 0 33.1 ± 0.3 33.3    33 ± 2.6 33.7 ± 2.7   37 28 28
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Last modified: 22 June 2021