Atomic and nuclear properties of bismuth germanate (BGO) [(Bi2O3)2(GeO2)3]
QuantityValueUnits ValueUnits
<Z/A> 0.42065     
Specific gravity 7.130 g cm-3   
Mean excitation energy 534.1 eV   
Minimum ionization 1.251 MeV g-1cm2 8.918 MeV cm-1
Nuclear collision length 96.2 g cm-2 13.49 cm
Nuclear interaction length 159.1 g cm-2 22.32 cm
Pion collision length 122.2 g cm-2 17.14 cm
Pion interaction length 190.7 g cm-2 26.74 cm
Radiation length 7.97 g cm-2 1.118 cm
Critical energy 10.50 MeV (for e-) 10.14 MeV (for e+)
Molière radius 16.10 g cm-2 2.259 cm
Plasma energy ℏωp 49.90 eV   
Muon critical energy 185. GeV   
Melting point 1317. K 1044. C
Index of refraction (Na D) 2.150     
Composition:
Elem ZAtomic frac* Mass frac
O
8
12.00
0.154126
Ge
 32
3.00
0.174820
Bi
 83
4.00
0.671054
* calculated from mass fraction data

For muons, dE/dx = a(E) + b(E) E. Tables of b(E): PDF TEXT
Table of muon dE/dx and Range: PDF TEXT
Explanation of some entries
Note: Evalite structure; less common is Bi{12}GeO{20}