ISOLDE Workshop and Users meeting 2023

Session

Rare Decays I

30 Nov 2023, 11:30

503/1-001 - Council Chamber (CERN)

Conveners

Rare Decays I

• Piet Van Duppen (KU Leuven (BE))

30. Laser-polarisation assisted beta-decay spectroscopy at VITO

Monika Piersa-Silkowska (CERN)

30/11/2023, 11:30

Invited (In person)

Experimental β-decay studies contribute significantly to improving our understanding of exciting nuclear phenomena emerging far from stability, such as β-delayed multiple-particle emission [1–3], evolution of the shell structure [4], and the appearance of so-called “islands of inversion” [5]. The great success of β-decay experiments in probing ground- and excited-state properties is due...

17. First determination of weak magnetism in the fission fragment region.

Simon Vanlangendonck (KU Leuven (BE))

30/11/2023, 12:00

Submitted oral (In person)

High-precision measurements of the beta spectrum shape and beta-neutrino angular correlation parameter allow to test for exotic scalar and/or tensor currents in the weak interaction. These measurements are the goal of the WISArD collaboration at ISOLDE [1]. When aiming for the highest precision in the description of the shape of the beta energy spectrum, even small Standard Model effects,...

4. Search for double alpha decay

Louis Heitz (Université Paris-Saclay (FR))

30/11/2023, 12:15

Submitted oral (In person)

Alpha decay is known for more than a century, however a global microscopic description has only been developed recently by Mercier al. [1]. With the framework of covariant energy density functional, using a least action principle, the half-life of medium and heavy nuclei are in agreement within one order of magnitude with experimental values [2].

Moreover, a new type of decay was predicted...

55. The 229Th nuclear-clock isomer: half-life and energy determination in several different crystals

Dr Skyy Venancio Pineda (KU Leuven (BE))

30/11/2023, 12:30

Submitted oral (In person)

The thorium-229 nucleus contains an isomeric state with a low excitation energy, making it accessible to laser excitation. It is presently the only known candidate for the development of a nuclear clock [1,2,3,4] which will enable testing fundamental principles in physics, such as e.g. potential variations of fundamental constants [5] or the search for ultralight dark matter candidates [6]....