2-7 June 2019
Simon Fraser University
America/Vancouver timezone
Welcome to the 2019 CAP Congress Program website! / Bienvenue au siteweb du programme du Congrès de l'ACP 2019 !

John D'Auria, the relativistic chemistry of francium, and MeV-mass neutrinos

4 Jun 2019, 16:15
15m
SCC 9000 (Simon Fraser University)

SCC 9000

Simon Fraser University

Oral (Non-Student) / Orale (non-étudiant(e)) Symposia Day - Nuclear Astrophysics and Medical Isotopes (in honour of Prof. John D'Auria) T4-3 Nuclear Astrophysics/Structure and Medical Isotopes in honour of Prof. John D'Auria PM-2 (DNP) | Astrophysique nucléaire / Structure et isotopes médicaux en hommage au prof. John D'Auria PM-2 (DPN)

Speaker

John Behr (TRIUMF)

Description

TRIUMF's neutral atom trap (TRINAT) was started as a good match for surface-ionized alkali elements produced at TISOL (TEST/TRIUMF Isotope Separator On-line).
TRINAT had two main goals-- beta-neutrino correlations, and the chemistry of francium championed by John D'Auria.
Relativity makes francium's properties harder to extrapolate from the lighter alkali elements; e.g., the ionization potential is higher than cesium's due to a more deeply bound S ground-state orbital, while production of ultracold molecular dimers by photoassociation is predicted to be stymied.
TRINAT failed in its first attempt to trap beta-decaying potassium isotopes, but we fixed a ten linewidth error in our estimated atomic resonance location and succeeded two weeks later, largely because TISOL had admirable flexibility.
TRINAT also failed to trap 226Fr in 1996, and francium was not trapped at TRIUMF for another fifteen years. Diverted personnel searched for MeV-mass neutrinos instead [M. Trinczek et al. PRL 2001], prividing a cosmology tie-in to the symposium title.

Primary author

John Behr (TRIUMF)

Presentation Materials