evaluate the half-life of the Pt isotopes. For the important naturally occurring 190Pt isotope, the radiogenic parent in the 190Pt !186Os dating system, the model yielded a half-life-value of (3.7 ± 0.3) · 1011 y. This is comparable to (3.2 ± 0.1) · 1011 y which was obtained in the last direct counting experiment to measure the alpha activity of 190Pt [O.A.P. Tavares, M.L. Terranova, Radiat. Meas. 27 (1997) 19]. A literature survey of available alpha decay half-life values for 190Pt isotope is also reported. The significant discrepancies found between data obtained by direct counting, indirect geological methods and different calculation models are analysed and discussed.
Tavares, O., TERRANOVA PERSICHELLI, M.l., Medeiros, E. (2006). New evaluation of alpha-decay half-lifew of 190 Pt isotope for the Pt/Os dating system. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION B, BEAM INTERACTIONS WITH MATERIALS AND ATOMS, B 243, 256-260 [:10.1016/j.nimb.2005.08.122].
New evaluation of alpha-decay half-lifew of 190 Pt isotope for the Pt/Os dating system
TERRANOVA PERSICHELLI, MARIA LETIZIA;
2006-01-01
Abstract
evaluate the half-life of the Pt isotopes. For the important naturally occurring 190Pt isotope, the radiogenic parent in the 190Pt !186Os dating system, the model yielded a half-life-value of (3.7 ± 0.3) · 1011 y. This is comparable to (3.2 ± 0.1) · 1011 y which was obtained in the last direct counting experiment to measure the alpha activity of 190Pt [O.A.P. Tavares, M.L. Terranova, Radiat. Meas. 27 (1997) 19]. A literature survey of available alpha decay half-life values for 190Pt isotope is also reported. The significant discrepancies found between data obtained by direct counting, indirect geological methods and different calculation models are analysed and discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
