International
Tables for
Crystallography
Volume C
Mathematical, physical and chemical tables
Edited by E. Prince

International Tables for Crystallography (2006). Vol. C, ch. 7.3, p. 645

Table 7.3.2.1 

P. Converta and P. Chieuxa

aInstitut Laue–Langevin, Avenue des Martyrs, BP 156X, F-38042 Grenoble CEDEX, France

Table 7.3.2.1| top | pdf |
Neutron capture reactions used in neutron detection

n = neutron, p = H+ = proton, t = 3H = triton, α = 4H+ = α, alpha, e = electron.

Capture reactionCross section at 1 Å (barns)Secondary-particle energies (MeV)
3He + nt + p 3000 t  0.20 p  0.57  
6Li + nt + α 520 t  3.74 α  2.05  
[Scheme scheme1]
2100

α  1.47
α  1.78

7Li  0.83
7Li  1.01

γ  0.48
[Scheme scheme2] 74000
(natGd: 17000)
e spectrum
γ spectrum
0.07 to 0.182
up to 8
 
235U + n → fission fragments 320 Fission fragments up to 80