Mesure de précision de la décroissance super‐permise de $^{18}$Ne

Abstract : This thesis focuses on high-precision measurements of the superallowed (0+ $\rightarrow$ 0+ ; T=1) Fermi decay of $^{18}$Ne. Low-energy studies of the weak interaction allow one to test both predictions of the Standard Model, and theoretical models that evaluate corrections to the beta decay strength due to the isospin symmetry breaking by charge-dependent nuclear forces. In this work, a precise measurement of the half-life and branching ratio of the superallowed transition were obtained for the decay of $^{18}$Ne. The half-life, T1/2 = 1.6635 (20) s, was obtained in a beta decay experiment performed at the ISAC facility at TRIUMF in Canada. The branching ratio, BR = 7.29 (5) %, was measured with a high precision gamma-ray detector at the SPIRAL facility of GANIL in France. This latter measurement required the development of a dedicated experimental tape station that will allow similar high-precision measurements to be performed in the future with other superallowed emitters and mirror beta decays.
Document type :
Theses
Complete list of metadatas

Cited literature [39 references]  Display  Hide  Download

http://hal.in2p3.fr/tel-01203286
Contributor : Michel Lion <>
Submitted on : Tuesday, September 22, 2015 - 4:21:28 PM
Last modification on : Thursday, February 1, 2018 - 1:35:52 AM
Long-term archiving on : Tuesday, December 29, 2015 - 9:13:23 AM

Identifiers

  • HAL Id : tel-01203286, version 1

Collections

Citation

Haïfa Bouzomita-Zran. Mesure de précision de la décroissance super‐permise de $^{18}$Ne. Physique Nucléaire Expérimentale [nucl-ex]. Université de Caen Normandie, 2015. Français. ⟨tel-01203286⟩

Share

Metrics

Record views

315

Files downloads

385