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

postmaster@admin.triumf.ca postmaster@admin.triumf.ca
Wed, 2 Nov 2005 05:00:00 -0800


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Date/Time: Wed 2005-11-02 at 14:00

Location:  Auditorium          

Speaker:   Jess H. Brewer (UBC)

Title:     Relativistic Shifts of g_µ in Muonic Atoms

Abstract: The discovery of an M9B tune giving substantial transverse muon spin polarization allows convenient µ-SR experiments in high transverse magnetic field.  This new capability has made possible precise measurements of the magnetogyric ratios of negative muons in the ground states of muonic atoms of 12C, 16O, 24Mg, 28Si, 32S, 40Ca, (nat)Ti, (nat)Zn, (nat)Cd and (nat)Pb.  The precision for 12C µ- is ± 23 ppm, of which only 6 ppm is statistical; for (nat)Zn µ- the precision is ± 269 ppm and for (nat)Pb µ- it is ± 0.23%.  Such experiments may eventually provide a new testing ground for QED in very strong Coulomb fields; today they offer a new way of measuring finite nuclear size effects.  I will discuss a little of the history of TRIUMF Experiment 932 and explain how these measurements emerged "accidentally" from an attempt to improve the performance of µ-SR experiments in general.


Stimulants available 15 minutes before the talk.

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