[Triumf-seminars] TRIUMF Seminar today at 14:00

triumf-seminars at lists.triumf.ca triumf-seminars at lists.triumf.ca
Mon May 2 05:00:04 PDT 2011


Date/Time: Mon 2011-05-02 at 14:00

Location:  Auditorium          

Speaker:   Will Williams (Argonne National Laboratory)

Title:     Radioargon dating with Atom Trap Trace Analysis (detection of 39Ar at the part-per quadrillion level)

Abstract: Atom Trap Trace Analysis (ATTA), a laser-based atom counting method, has been used to analyze atmospheric 39Ar (half-life = 269 yr), a cosmogenic isotope with an isotopic abundance of 0.8 parts-per-quadrillion (8.x10-16). In addition to the superior selectivity demonstrated in this work, both the counting rate and counting efficiency of ATTA have been improved by two orders of magnitude over prior results. Along with the previously demonstrated detection of 81Kr (229,000 yr) and 85Kr (10.8 yr) at the 10-12 level, ATTA can now be used to analyze all three long-lived noble gas radioisotopes covering a wide range of ages and applications. (The last 10 minutes of the talk will be a status update of a 6He beta-neutrino experiment)

Stimulants available 15 minutes before the talk.

______________________________

Subscription information available at http://admin.triumf.ca/netdata/seminars/list



More information about the Triumf-seminars mailing list