Poster (Scientific congresses and symposiums)
Towards precision beta-decay measurements with laser-cooled argon-35
Lenaers, Florence; Glover, Rohan; Bastin, Thierry
20164th International Workshop on the Physics of fundamental Symmetries and Interactions (PSI2016)
Editorial reviewed
 

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Keywords :
Atomic physics; Cold atoms; Laser cooling; Nuclear beta decay; Weak interaction
Abstract :
[en] Laser cooling and trapping techniques enjoy a solid reputation as powerful and elegant providers of well-localized, backing-free sources. Not only does this hold true within the atomic physics and quantum optics communities, but also beyond. Most notably, these techniques have recently joined the toolbox of low-energy, high-precision tests of the Standard Model. Our work with argon falls within the subset of nuclear beta decay studies, which have historically played a key role in establishing and testing our understanding of weak-interaction physics. In this framework, precision measurements of the beta asymmetry correlation parameter in the beta decay of Ar-35 have been identified as one promising probe for physics beyond the Standard Model. Our current work focuses on the development of a test magneto-optical trap (MOT) setup for Ar-40 as a preliminary step towards cooling and trapping Ar-35 atoms. In particular, much effort is being put into optimizing the efficiency of our source apparatus, which is crucial to achieving high enough statistics in the final trap. We present the current status of the experimental realization of our setup. Measuring the beta asymmetry correlation parameter requires highly spin-polarized samples. Therefore, in parallel to our experimental work, we are numerically investigating methods for generating, controlling and precisely measuring the degree of spin polarization of a sample of Ar-35 atoms. We also aim at being able to quickly switch between a polarized and a non-polarized sample so as to better understand systematic effects. We report on the progress of our theoretical modeling.
Research center :
CESAM - Complex and Entangled Systems from Atoms to Materials - ULiège
Disciplines :
Physics
Author, co-author :
Lenaers, Florence ;  Université de Liège > Département de physique > Spectroscopie atomique et nucléaire, archéométrie
Glover, Rohan ;  Griffith University > Centre for Quantum Dynamics
Bastin, Thierry  ;  Université de Liège > Département de physique > Spectroscopie atomique et Physique des atomes froids
Language :
English
Title :
Towards precision beta-decay measurements with laser-cooled argon-35
Publication date :
18 October 2016
Event name :
4th International Workshop on the Physics of fundamental Symmetries and Interactions (PSI2016)
Event organizer :
Paul Scherrer Institut
Event place :
Villigen, Switzerland
Event date :
du 17 octobre au 20 octobre 2016
Audience :
International
Peer reviewed :
Editorial reviewed
Name of the research project :
BriX
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
Available on ORBi :
since 22 November 2016

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