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Scalar current limit from the beta-neutrino correlation: the WISArD experiment
/ Araujo-Escalona, V (Leuven U.) ; Alfaurt, P (CENBG, Gradignan) ; Ascher, P (CENBG, Gradignan) ; Atanasov, D (Leuven U. ; CERN) ; Blank, B (CENBG, Gradignan) ; Daudin, L (CENBG, Gradignan) ; Fléchard, X (Caen U.) ; Gerbaux, M (CENBG, Gradignan) ; Giovinazzo, J (CENBG, Gradignan) ; Grévy, S (CENBG, Gradignan) et al.
Beta - neutrino correlation measurements are key in the research of physics beyond the Standard Model. In pure Fermi beta transitions, the beta-neutrino correlation coefficient, a βν, is sensitive to the presence of scalar currents. [...]
2019 - 9 p.
- Published in : J. Phys.: Conf. Ser. 1308 (2019) 012003
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In : 42nd Symposium on Nuclear Physics, Cocoyoc, Mexico, 07 - 10 Jan 2019, pp.012003
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Experimental setup for Weak Interaction Studies with Radioactive ion-beams WISArD
/ Atanasov, D (CERN) ; Cresto, F (LPC, Caen) ; Nies, L (CERN) ; Pomorski, M (LP2I, Bordeaux) ; Versteegen, M (LP2I, Bordeaux) ; Alfaurt, P (LP2I, Bordeaux) ; Araujo-Escalona, V (Leuven U.) ; Ascher, P (LP2I, Bordeaux) ; Blank, B (LP2I, Bordeaux) ; Daudin, L (LP2I, Bordeaux) et al.
The article describes the commissioning and technical development of the Weak Interaction Studies with 32Ar Decay (WISArD) experiment, installed at the radioactive ion-beam facility ISOLDE/CERN. The experiment aims to extend the present limits on scalar and tensor currents in the weak interaction and hence search for physics beyond the Standard Model. [...]
2023 - 11 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1050 (2023) 168159
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Simultaneous measurements of the $\beta$ -neutrino angular correlation in $^{32}$Ar pure Fermi and pure Gamow-Teller transitions using $\beta$ -proton coincidences
/ Araujo-Escalona, V. (Leuven U.) ; Atanasov, D. (Leuven U. ; CERN) ; Fléchard, X. (ENSICAEN) ; Alfaurt, P. (CENBG, Gradignan) ; Ascher, P. (CENBG, Gradignan) ; Blank, B. (CENBG, Gradignan) ; Daudin, L. (CENBG, Gradignan) ; Gerbaux, M. (CENBG, Gradignan) ; Giovinazzo, J. (CENBG, Gradignan) ; Grévy, S. (CENBG, Gradignan) et al.
We report first time measurements of the beta-neutrino angular correlation based on the kinetic energy shift of protons emitted in parallel or anti-parallel directions with respect to the positron in the beta decay of $^{32}$Ar. This proof of principle experiment provided simultaneous measurements for the superallowed 0$^+$~$\rightarrow$~0$^+$ transition followed by a 3356~keV proton emission and for a Gamow-Teller transition followed by a 2123~keV proton emission. [...]
arXiv:1906.05135.-
2020-05-14 - 7 p.
- Published in : Phys. Rev. C 101 (2020) 055501
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WISARD: Weak-interaction studies with $^{32}$Ar decay
/ Ascher, P (CEN Bordeaux-Gradignan, France) ; Blank, B (CEN Bordeaux-Gradignan, France) ; Gerbaux, M (CEN Bordeaux-Gradignan, France) ; Giovinazzo, J (CEN Bordeaux-Gradignan, France) ; Grévy, S (CEN Bordeaux-Gradignan, France) ; Kurtukian Nieto, T (CEN Bordeaux-Gradignan, France) ; Severijns, N (KU Leuven, Belgium) ; Araujo-Escalona, V (KU Leuven, Belgium) ; Ban, G (LPC Caen, France) ; Fléchard, X (LPC Caen, France) et al.
CERN-INTC-2016-050 ; INTC-I-172.
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2016.
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A time projection chamber for the three-dimensional reconstruction of two-proton radioactivity events
/ Blank, B (Bordeaux U. ; CENBG, Gradignan) ; Hay, L (Bordeaux U. ; CENBG, Gradignan) ; Borcea, C (Bordeaux U. ; Bucharest, IFIN-HH ; CENBG, Gradignan) ; Leblanc, S (Bordeaux U. ; CENBG, Gradignan) ; Giovinazzo, J (Bordeaux U. ; CENBG, Gradignan) ; Rebii, A (Bordeaux U. ; CENBG, Gradignan) ; List, S (Bordeaux U. ; CENBG, Gradignan) ; Marchand, C (Bordeaux U. ; CENBG, Gradignan) ; Dossat, C (Bordeaux U. ; DAPNIA, Saclay ; CENBG, Gradignan) ; Delalee, F (Bordeaux U. ; CENBG, Gradignan) et al.
Two-proton radioactivity was observed in 2002 in the decay of Fe-45. However, the experiments performed at that time did not allow the observation of the two protons directly. [...]
2010
- Published in : Nucl. Instrum. Methods Phys. Res., A 613 (2010) 65-78
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Weak interaction studies via beta-delayed proton emission
/ Alfaurt, Philippe (CENBG-IN2P3-CNRS) ; Araujo-Escalona, Victoria (Instituut voor Kern- en Stralingsfysica, Katholieke Universiteit Leuven) ; Ascher, Pauline (CENBG-IN2P3-CNRS) ; Atanasov, Dinko (CERN) ; Blank, Bertram (CENBG-IN2P3-CNRS) ; Cresto, Federica (CENBG-IN2P3-CNRS) ; Daudin, Laurent (CENBG-IN2P3-CNRS) ; Fléchard, Xavier (Normandie Univ, ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen) ; Garcia, Alejandro (University of Washington, Seattle) ; Gerbaux, Mathias (CENBG-IN2P3-CNRS) et al.
CERN-INTC-2020-058 ; INTC-P-574.
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2020.
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Precise half-life measurements for $^{38}$Ca and $^{39}$Ca
/ Blank, B (CENBG, Gradignan) ; Giovinazzo, J (CENBG, Gradignan) ; Demonchy, C-E (CENBG, Gradignan) ; Borge, M J G (Madrid, Inst. Estructura Materia) ; Matea, I (CENBG, Gradignan) ; Munoz, F (CENBG, Gradignan) ; Huikari, J (CENBG, Gradignan) ; Dominguez-Reyes, R (Madrid, Inst. Estructura Materia) ; Plaisir, C (CENBG, Gradignan) ; Sturm, S (Mainz U.) et al.
The half-lives of Ca-38 and Ca-39 have been measured at ISOLDE of CERN. The REXTRAP facility was used to prepare ultra-clean samples of radioactive nuclei for precision decay spectroscopy. [...]
2010
- Published in : Eur. Phys. J. A 44 (2010) 363-372
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