First observation of $\beta$-delayed $\gamma$-proton decay in the $T_z$ = -2, $^{56}$Zn nucleus
S. E. A. Orrigo
,
B. Rubio
,
Y. Fujita
,
Bertram Blank
(1)
,
W. Gelletly
,
J. Agramunt
,
A. Algora
,
P. Ascher
(1)
,
B. Bilgier
,
L. Caceres
(2)
,
R. B. Cakirli
,
H. Fujita
,
E. Ganioğlu
,
M. Gerbaux
(1)
,
J. Giovinazzo
(1)
,
S. Grévy
(1)
,
O. Kamalou
(2)
,
H. C. Kozer
,
L. Kucuk
,
T. Kurtukian Nieto
(1)
,
F. Molina
,
L. Popescu
,
A. M. Rogers
,
G. Susoy
,
C. Stodel
(2)
,
T. Suzuki
,
A. Tamii
,
J.C. Thomas
(2)
S. E. A. Orrigo
- Function : Author
B. Rubio
- Function : Author
Y. Fujita
- Function : Author
Bertram Blank
- Function : Author
- PersonId : 738372
- IdHAL : bertram-blank
- ORCID : 0000-0001-8050-6850
- IdRef : 069503834
W. Gelletly
- Function : Author
J. Agramunt
- Function : Author
A. Algora
- Function : Author
P. Ascher
- Function : Author
- PersonId : 739967
- IdHAL : pauline-ascher
- ORCID : 0000-0002-1990-0848
- IdRef : 157777685
B. Bilgier
- Function : Author
R. B. Cakirli
- Function : Author
H. Fujita
- Function : Author
E. Ganioğlu
- Function : Author
M. Gerbaux
- Function : Author
- PersonId : 1173352
- IdHAL : mathias-gerbaux
- ORCID : 0000-0002-3852-2643
J. Giovinazzo
- Function : Author
- PersonId : 738930
- IdHAL : jerome-giovinazzo
- ORCID : 0000-0001-7436-8877
- IdRef : 198020287
H. C. Kozer
- Function : Author
L. Kucuk
- Function : Author
T. Kurtukian Nieto
- Function : Author
- PersonId : 10429
- IdHAL : t-kurtukian-nieto
- ORCID : 0000-0002-0028-0220
- IdRef : 259022632
F. Molina
- Function : Author
L. Popescu
- Function : Author
A. M. Rogers
- Function : Author
G. Susoy
- Function : Author
C. Stodel
- Function : Author
- PersonId : 177922
- IdHAL : christelle-stodel
- ORCID : 0000-0003-4658-2213
- IdRef : 227006291
T. Suzuki
- Function : Author
A. Tamii
- Function : Author
J.C. Thomas
- Function : Author
- PersonId : 738662
- IdHAL : jean-charles-thomas
- ORCID : 0000-0001-6618-9772
Abstract
We report on the first experimental observation of a very exotic decay mode at the proton drip-line, the $\beta$-delayed $\gamma$-proton decay, clearly seen in the $\beta$ decay of the $T_z$ = -2, $^{56}$Zn nucleus. The $^{56}$Zn half-life and decay scheme have been determined. The decay proceeds by $\beta$-delayed proton emission and $\beta$-delayed $\gamma$ de-excitation. The exotic $\beta$-delayed $\gamma$-proton emission was also detected in three cases. It affects the usual determination of the Gamow-Teller (GT) strength. Absolute Fermi and GT strengths have been deduced. Evidence for fragmentation of the Fermi strength due to isospin mixing is found.