Mediterranean and Near East obsidian reference samples to establish artefacts provenance

Heritage Science

Table 1 Analytical nuclear data used in INAA

Radionuclide	Element	Half life		γ-Ray used (keV)	LOD^a(μg g⁻¹)	Note
⁷⁶As	As	26.3	h	559.2	0.008	¹²²Sb^b
¹³¹Ba	Ba	11.8	d	496.3	10
⁸²Br	Br	35.87	h	776.6	0.02	¹⁵²Eu^b
¹⁴¹Ce	Ce	32.38	d	145.4	0.01
⁵⁸Co	Ni	71.3	d	810.3	80	(n,p)^c
⁶⁰Co	Co	5.272	y	1332.5	0.0008
⁵¹Cr	Cr	27.7	d	320.0	0.09
¹³⁴Cs	Cs	2.062	y	795.7	0.003
¹⁵²Eu	Eu	12.7	y	1408.8	0.0002
⁵⁹Fe	Fe	45.1	d	1099.2	5
¹⁸¹Hf	Hf	42.5	d	482.2	1
⁴² K	K	12.36	h	1524.7	260
¹⁴⁰La	La	40.27	h	1596.2	0.0005
²⁴Na	Na	15.02	h	1368.6	2
¹⁴⁷Nd	Nd	11.06	d	531.0	10
⁸⁶Rb	Rb	18.66	d	1076.7	0.4
¹²²Sb	Sb	2.70	d	564.0	6
¹²⁴Sb	Sb	60.9	d	1690.7	0.01
⁴⁶Sc	Sc	83.85	d	889.2	0.0008
⁷⁵Se	Se	120.4	d	264.6	0.02	¹⁸²Ta^b
¹⁵³Sm	Sm	1948	y	103.1	0.001
¹¹³Sn	Sn	115.1	d	391.1	40
⁸⁵Sr	Sr	64.0	d	514.0	0.08	e⁺+e^-c
¹⁸²Ta	Ta	115	d	1221.3	0.5
¹⁶⁰ Tb	Tb	72.1	d	879.4	0.08
²³³ Pa	Th	27.4	d	311.8	0.2	(n,γ,β⁻)
²³⁹ Np	U	2.35	d	277.6	0.2	²⁰³Hg^b⁷⁶Se^b
¹⁸⁷ W	W	23.9	h	687.7	0.1
¹⁷⁵Yb	Yb	4.19	d	396.1	2
⁶⁵Zn	Zn	243.8	d	1115.5	0.04	⁴⁶Sc^b
⁹⁵Zr	Zr	65.0	d	756.6	80

Nuclear data (i.e., radioisotope from (n,γ) reaction, half-life (h: hour; d: day; y: year), peak energy, note) and LOD of each element investigated in this study (a: calculated according to ref. 15 and expressed as μg g^-1; b: interfering radionuclide; c: other types of neutron reactions).