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

[postmaster@admin.triumf.ca]

---------------------- multipart/mixed attachment
Date/Time: Fri 2005-05-13 at 14:00

Location:  Auditorium          

Speaker:   Guy Savard (Argonne National Lab. & University of Chicago)

Title:     Precision measurements with trapped radioactive ions

Abstract: The properties of radioactive ions are a critical input to many astrophysical processes and low-energy tests of the standard model. A universal injection system to transform radioactive ions produced by nuclear reactions into a low-energy beam suitable for efficient injection into ion traps has been constructed at Argonne National Laboratory. It is used to feed any radioactive ion species that can be produces by fusion evaporation or fission into two ion trap systems: the CPT and APT spectromers. The CPT is used for high-precision mass measurements on short-lived isotopes along the r- and rp-processes and to determine the Q-value of superallowed emitters to exquisite accuracy. The APT is preparing a scalar current search in the beta decay of 14O. The operation of these systems will be presented together with recent results of astrophysical interest and new results on the superallowed emitters 46-Vanadium and 14-Oxygen that have lead to a modification of the superallowed decay precision data set and new values for GV, Vud and the scalar limits obtained from the Fierz interference term. Status of the commissioning of the APT will also be given.

Stimulants available 15 minutes before the talk.

______________________________

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


---------------------- multipart/mixed attachment--