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Table 4 Nuclear data (radioisotope from (n,γ) reaction, cross section, half-life, peak energy) and limit of detection of the elements investigated in this study (a: calculated according to[33] and expressed as ppm; h: hour; d: day; y: year)

From: Obsidian use in the mosaic of the St. Juvenal church, Narni (Italy): chemical characterization and origin

Element Product nuclide Thermal cross section (barn) Half life γ-Ray used (keV) LODa(ppm)
As 76As 4.3 26.3 h 559.2 0.008
Ba 131Ba 13.5 11.8 d 496.3 10
Ce 141Ce 0.57 32.38 d 145.4 0.01
Co 60Co 37.2 5.272 y 1332.5 0.0008
Cr 51Cr 15.9 27.7 d 320.0 0.09
Cs 134Cs 29.0 2.062 y 795.7 0.003
Eu 152Eu 5900 12.7 y 1408.8 0.0002
Fe 59Fe 1.15 45.1 d 1099.2 5
Hf 181Hf 12.6 42.5 d 482.2 1
K 42K 1.46 12.36 H 1524.7 260
La 140La 9.0 40.27 h 1596.2 0.0005
Mo 99Mo 0.45 2.76 d 141.0 1
Na 24Na 0.53 15.02 h 1368.6 2
Nd 147Nd 1.3 11.06 d 531.0 10
Rb 86Rb 72.1 18.66 d 1076.7 0.4
Sb 122Sb 6.25 2.70 d 564.0 0.01
Sc 46Sc 26.5 83.85 d 889.2 0.0008
Se 75Se 51.8 120.4 d 246.6 0.02
Sm 153Sm 206 1948 y 103.1 0.001
Ta 182Ta 21.0 115 d 1221.3 0.5
Th 233Pa 7.40 27.4 d 311.8 0.2
U 239Np 2.70 2.35 d 277.6 0.2
W 187W 37.8 23.9 h 687.7 0.1
Yb 175Yb 65 4.19 d 396.1 2
Zn 65Zn 0.78 243.8 d 1115.5 0.04