First observation of two-proton radioactivity of $^{45}$Fe
Bertram Blank
(1)
,
M. Pfutzner
,
J. Giovinazzo
(1)
,
E. Badura
,
C. Bingham
,
C. Borcea
(1)
,
B.A. Brown
,
M. Chartier
,
S. Czajkowski
(1)
,
Francois de Oliveira Santos
(2)
,
Agnès Fleury
(1)
,
H. Geissel
,
L.V. Grigorenko
,
R. Grzywacz
,
M. Hellstrom
,
Z. Janas
,
J. Kurcewicz
,
A.S. Lalleman
,
M. Lewitowicz
(2)
,
M.J. Lopez Jimenez
,
V. Maslov
,
C. Mazzocchi
,
I. Mukha
,
G. Munzenberg
,
C. Plettner
,
M.S. Pravikoff
,
E. Roeckl
,
K.P. Rykaczewski
,
K. Schmidt
,
R.S. Simon
,
M. Stanoiu
(2)
,
J.-C. Thomas
(1)
Bertram Blank
- Function : Author
- PersonId : 738372
- IdHAL : bertram-blank
- ORCID : 0000-0001-8050-6850
- IdRef : 069503834
M. Pfutzner
- Function : Author
J. Giovinazzo
- Function : Author
- PersonId : 738930
- IdHAL : jerome-giovinazzo
- ORCID : 0000-0001-7436-8877
- IdRef : 198020287
E. Badura
- Function : Author
C. Bingham
- Function : Author
- PersonId : 755272
- ORCID : 0000-0003-2089-9466
B.A. Brown
- Function : Author
M. Chartier
- Function : Author
Francois de Oliveira Santos
- Function : Author
- PersonId : 176640
- IdHAL : francois-de-oliveira-santos
- ORCID : 0000-0003-4539-5985
- IdRef : 157826392
H. Geissel
- Function : Author
L.V. Grigorenko
- Function : Author
R. Grzywacz
- Function : Author
M. Hellstrom
- Function : Author
Z. Janas
- Function : Author
J. Kurcewicz
- Function : Author
A.S. Lalleman
- Function : Author
M.J. Lopez Jimenez
- Function : Author
V. Maslov
- Function : Author
C. Mazzocchi
- Function : Author
I. Mukha
- Function : Author
G. Munzenberg
- Function : Author
C. Plettner
- Function : Author
M.S. Pravikoff
- Function : Author
E. Roeckl
- Function : Author
K.P. Rykaczewski
- Function : Author
K. Schmidt
- Function : Author
- PersonId : 755221
- ORCID : 0000-0002-3418-7251
R.S. Simon
- Function : Author
J.-C. Thomas
- Function : Author
- PersonId : 738662
- IdHAL : jean-charles-thomas
- ORCID : 0000-0001-6618-9772
Abstract
In experiments at the FRS of GSI and at the SISSI-LISE3 facility of GANIL, the decay of the proton drip-line nucleus 45Fe has been studied after projectile fragmentation of a 58Ni primary beam. Fragment-implantation events have been correlated with radioactive decay events in silicon telescopes on an event-by-event basis. The decay-energy spectrum of45Fe implants shows a distinct peak consistent with a two-proton ground-state decay of 45Fe. None of the events in the peak were found to be in coincidence with γ radiation or with β particles which were searched for in the telescope-surrounding detectors. The decay energy for 45Fe agrees nicely with several theoretical predictions for two-proton emission. These predictions strongly support the observed decay to be a simultaneous two-proton ground-state decay.