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

[TRIUMF Seminars]

Date/Time: Thu 2013-03-14 at 14:00

Location:  Auditorium          

Speaker:   Kyle Leach (TRIUMF)

Title:     Probing Shell-Model Isospin-Symmetry-Breaking Theory Using Neutron-Transfer Reactions

Abstract: As part of an ongoing program to study fundamental symmetries in nuclear physics, a thorough investigation into shell-model isospin-symmetry-breaking (ISB) calculation theory has been conducted using direct reactions to observe detailed nuclear-structure information.  Both one- and two-neutron transfer reactions can be used to provide information on the radial-overlap and isospin-mixing components of these corrections, respectively.  The calculations become increasingly difficult with increasing mass, and experimental guidance for these heavier systems becomes crucial.  It was also found that the dominance of the ground-state-to-ground-state (p,t) cross section is strikingly similar to the dominance of the superallowed Fermi beta-decay between isobaric-analogue states.  This suggests that the population of excited 0+ states in this reaction may reflect the population in the Fermi decay process, and can be used as an additional guide for future experimental and theoretical work.  The first measurements in this program were conducted at the Maier-Leibnitz-Laboratory in Garching, Germany, and focus on the 62Ga superallowed beta-decay system.  The final results from these measurements, as well as very recent work on 50Cr will be presented.

Stimulants available 15 minutes before the talk.

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General TRIUMF seminar information available at http://www.triumf.ca/home/upcoming-events/about-seminars-lectures