Long fission times of super-heavy compound nuclei
A. Drouart
(1)
,
J. L. Charvet
(1)
,
A. Chbihi
(2)
,
M. Chevallier
(3)
,
C. Cohen
(4)
,
D. Dauvergne
(5)
,
R. Dayras
(1)
,
J.D. Frankland
(2)
,
D. Jacquet
(6)
,
R. Kirsch
(5)
,
M. Laget
(6)
,
P. Lautesse
(5)
,
A. L'Hoir
(4)
,
A. Marchix
(2)
,
M. Morjean
(2)
,
L. Nalpas
(1)
,
M. Pârlog
(2)
,
C. Ray
(5)
,
C. Schmitt
(5)
,
C. Stodel
(2)
,
L. Tassan-Got
(6)
,
C. Volant
(1)
M. Chevallier
- Fonction : Auteur
- PersonId : 763460
- ORCID : 0000-0003-2033-166X
- IdRef : 168443805
D. Dauvergne
- Fonction : Auteur
- PersonId : 181345
- IdHAL : denis-dauvergne
- ORCID : 0000-0002-6190-6311
- IdRef : 144275481
J.D. Frankland
- Fonction : Auteur
- PersonId : 737417
- IdHAL : john-frankland
- ORCID : 0000-0002-4907-5041
M. Laget
- Fonction : Auteur
- PersonId : 1065337
- IdHAL : michael-laget
- ORCID : 0009-0001-7690-6146
M. Pârlog
- Fonction : Auteur
- PersonId : 828878
- ORCID : 0000-0002-7566-0244
C. Stodel
- Fonction : Auteur
- PersonId : 177922
- IdHAL : christelle-stodel
- ORCID : 0000-0003-4658-2213
- IdRef : 227006291
Résumé
The blocking technique in single crystals is a direct method to investigate the presence of long fission time components. With a lead beam impinging on a germanium single crystal, we tried to produce compound nuclei (CN) with atomic number Z = 114 at high excitation energy. Blocking patterns for reaction products are reconstructed with position sensitive detectors at 20 ° relative to the beam direction. The Z and the energies of all products are measured with DeltaE-E telescopes of the 4pi INDRA array, so that all reaction channels are unambiguously identified. With this setup, we can reach long fission times (>10−18 s) that can be associated with CN fissions. However, in contrast to previous experiments in which such long fission times could be measured for Z = 120 and 124, no hint of long lifetimes within our sensitivity limit for Z = 114 was observed, which may be due to the neutron deficiency of the formed isotopes.