First direct observation of two protons in the decay of $^{45}$Fe with a Time-Projection Chamber
J. Giovinazzo
(1)
,
Bertram Blank
(1)
,
C. Borcea
(1)
,
G. Canchel
(1)
,
C.E. Demonchy
(1)
,
Francois de Oliveira Santos
(2)
,
C. Dossat
(3)
,
S. Grévy
(2)
,
L. Hay
(1)
,
J. Huikari
(1)
,
S. Leblanc
(1)
,
I. Matea
(1)
,
J.-L. Pedroza
(1)
,
L. Perrot
(2)
,
J. Pibernat
(1)
,
L. Serani
(1)
,
C. Stodel
(2)
,
J.C. Thomas
(2)
J. Giovinazzo
- Fonction : Auteur
- PersonId : 738930
- IdHAL : jerome-giovinazzo
- ORCID : 0000-0001-7436-8877
- IdRef : 198020287
Bertram Blank
- Fonction : Auteur
- PersonId : 738372
- IdHAL : bertram-blank
- ORCID : 0000-0001-8050-6850
- IdRef : 069503834
Francois de Oliveira Santos
- Fonction : Auteur
- PersonId : 176640
- IdHAL : francois-de-oliveira-santos
- ORCID : 0000-0003-4539-5985
- IdRef : 157826392
C. Stodel
- Fonction : Auteur
- PersonId : 177922
- IdHAL : christelle-stodel
- ORCID : 0000-0003-4658-2213
- IdRef : 227006291
J.C. Thomas
- Fonction : Auteur
- PersonId : 738662
- IdHAL : jean-charles-thomas
- ORCID : 0000-0001-6618-9772
Résumé
The decay of the ground-state two-proton emitter 45Fe was studied with a time-projection chamber and the emission of two protons was unambiguously identified. The total decay energy and the half-life measured in this work agree with the results from previous experiments. The present result constitutes the first direct observation of the individual protons in the two-proton decay of a long-lived ground-state emitter. In parallel, we identified for the first time directly two-proton emission from 43Cr, a known beta-delayed two-proton emitter. The technique developped in the present work opens the way to a detailed study of the mechanism of ground-state as well as beta-delayed two-proton radioactivity.
