Naslov
Radiocarbon dating of millimole-sized gaseous samples

Autori
Srdoč, Dušan ; Obelić, Bogomil ; Horvatinčić, Nada

Izvornik
Radiocarbon (0033-8222) 25 (1983), 2; 485-492

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
radiocarbon dating; proportional counter

Sažetak
As an alternative to the accelerator technique, a simple, compact, small counter system has been developed and tested for routine 14^C dating. Our small counter is an all-metal design made of the OFHC copper with quartz supports for the anode (25pm stainless steel). Careful selection of materials for the counter construction was made based on the measurements of the alpha contamination. Methane as the counter filling gave better resolution and gas gain stability, whereas CO_2 gave lower background counting rate and it was easier to prepare and to handle. The long term run using CH_4 showed that the gas gain remained stable within 1-2% for months after the initial drop which followed the counter filling. A 7-day counting period was sufficient to achieve a 3% relative standard deviation which was considered acceptable for routine dating of younger samples.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA