caa a22 4500 463218787 CHVBK 20180405153205.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1134/S106193480706010X doi (NATIONALLICENCE)springer-10.1134/S106193480706010X Optimization of gamma activation autoradiography for searching noble methods in samples of ultrabasic rocks [Elektronische Daten] [Vin Thun, V. Minaev, V. Samosadnyi] The conditions for the gamma activation autoradiography of some noble metals are optimized by selecting electron energy upon irradiation with bremsstrahlung from a U-17 linear electron accelerator (Moscow Engineering Physics Institute). Two ultrabasic rocks are taken as examples. It is shown that the reduction of electron energy from 25 to 15 MeV lowers the detection limits for some platinum-group metals and gold in such samples to the level attained at an electron energy of 25 MeV in the absence of background radiation. In one of the samples (Gal'mano-Enansk massif, Kamchatka), we detected an inclusion that can be due to the presence of (0.18 ± 0.03) ng Au or (8.4 ± 1.4) ng Pt. The detection limits (ng) are as follows: Au, 0.03; Pt, 0.16; Pd, 0.42, and Rh, 3.4. Pleiades Publishing, Ltd., 2007 Thun Vin Moscow Engineering Physics Institute, State University, Kashirskoe sh. 31, 115409, Moscow, Russia aut Minaev V. Moscow Engineering Physics Institute, State University, Kashirskoe sh. 31, 115409, Moscow, Russia aut Samosadnyi V. Moscow Engineering Physics Institute, State University, Kashirskoe sh. 31, 115409, Moscow, Russia aut Journal of Analytical Chemistry Nauka/Interperiodica 62/6(2007-06-01), 554-558 1061-9348 62:6<554 2007 62 10809 https://doi.org/10.1134/S106193480706010X text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S106193480706010X text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Thun Vin Moscow Engineering Physics Institute, State University, Kashirskoe sh. 31, 115409, Moscow, Russia aut NATIONALLICENCE 700 1- Minaev V. Moscow Engineering Physics Institute, State University, Kashirskoe sh. 31, 115409, Moscow, Russia aut NATIONALLICENCE 700 1- Samosadnyi V. Moscow Engineering Physics Institute, State University, Kashirskoe sh. 31, 115409, Moscow, Russia aut NATIONALLICENCE 773 0- Journal of Analytical Chemistry Nauka/Interperiodica 62/6(2007-06-01), 554-558 1061-9348 62:6<554 2007 62 10809 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer