| Published Articles | |
| Title | High-precision half-life measurements of the T=1/2 mirror β decays F17 and Cl33 |
| Author(s) | Grinyer, J (GANIL) ; Grinyer, G F (GANIL) ; Babo, M (GANIL) ; Bouzomita, H (GANIL) ; Chauveau, P (GANIL) ; Delahaye, P (GANIL) ; Dubois, M (GANIL) ; Frigot, R (GANIL) ; Jardin, P (GANIL) ; Leboucher, C (GANIL) ; Maunoury, L (GANIL) ; Seiffert, C (CERN) ; Thomas, J C (GANIL) ; Traykov, E (GANIL ; Strasbourg, IPHC) |
| Publication | 2015 |
| Number of pages | 7 |
| In: | Phys. Rev. C 92 (2015) 045503 |
| DOI | 10.1103/PhysRevC.92.045503 |
| Subject category | Nuclear Physics - Experiment |
| Abstract | Background: Measurements of the ft values for T=1/2 mirror β+ decays offer a method to test the conserved vector current hypothesis and to determine Vud, the up-down matrix element of the Cabibbo-Kobayashi-Maskawa matrix. In most mirror decays used for these tests, uncertainties in the ft values are dominated by the uncertainties in the half-lives. Purpose: Two precision half-life measurements were performed for the T=1/2β+ emitters, F17 and Cl33, in order to eliminate the half-life as the leading source of uncertainty in their ft values. Method: Half-lives of F17 and Cl33 were determined using β counting of implanted radioactive ion beam samples on a moving tape transport system at the Système de Production d'Ions Radioactifs Accélérés en Ligne low-energy identification station at the Grand Accélérateur National d'Ions Lourds. Results: The F17 half-life result, 64.347 (35) s, precise to ±0.05%, is a factor of 5 times more precise than the previous world average. The half-life of Cl33 was determined to be 2.5038 (22) s. The current precision of ±0.09% is nearly 2 times more precise compared to the previous world average. Conclusions: The precision achieved during the present measurements implies that the half-life no longer dominates the uncertainty of the ft values for both T=1/2 mirror decays F17 and Cl33. |
| Copyright/License | publication: © 2015-2025 The Author(s) (License: CC-BY-3.0) |
Corresponding record in: Inspire
レコード 生成： 2016-06-27, 最終変更： 2022-08-10
