Table 1 a-values obtained for the measured Al and Ti centres of the two studied samples C-E3886 and C-E3891.

From: First experimental evaluation of the alpha efficiency in coarse-grained quartz for ESR dating purposes: implications for dose rate evaluation

Sample ID

α-irradiation dose (Gy)

γ-irradiation dose (Gy)

a-value

Al centre

Ti centre (Option A)

Ti-H centre (Option C)

Ti centre (Option D)

C-E3886

2230 ± 66

200 ± 5

0.076 ± 0.004

0.068 ± 0.004

0.068 ± 0.006

0.071 ± 0.005

C-E3886

4460 ± 132

395 ± 9

0.072 ± 0.006

0.071 ± 0.005

0.084 ± 0.004

0.081 ± 0.003

C-E3891

2230 ± 66

200 ± 5

0.076 ± 0.003

0.071 ± 0.003

0.082 ± 0.008

0.081 ± 0.003

C-E3891

4460 ± 132

395 ± 9

0.075 ± 0.003

0.063 ± 0.002

0.061 ± 0.003

0.063 ± 0.003

Average a-value and associated error (1 s.d.)

0.075 ± 0.002 (2.4%)

0.068 ± 0.004 (5.4%)

0.074 ± 0.011 (15.0%)

0.074 ± 0.009 (11.8%)