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Towards saturation of the electron-capture delayed fission probability: The new isotopes $^{240}Es$ and $^{236}Bk$
- Source :
- Physics Letters B, Physics Letters B, Elsevier, 2017, 764, pp.265-270. ⟨10.1016/j.physletb.2016.11.038⟩, Phys.Lett.B, Phys.Lett.B, 2017, 764, pp.265-270. ⟨10.1016/j.physletb.2016.11.038⟩, Physics letters / B 764, 265-270 (2017). doi:10.1016/j.physletb.2016.11.038, Physics Letters B, Vol 764, Iss C, Pp 265-270 (2017)
- Publication Year :
- 2017
- Publisher :
- HAL CCSD, 2017.
-
Abstract
- The new neutron-deficient nuclei 240 Es and 236 Bk were synthesised at the gas-filled recoil separator RITU. They were identified by their radioactive decay chains starting from 240 Es produced in the fusion–evaporation reaction 209 Bi( 34 S,3n) 240 Es. Half-lives of 6 ( 2 ) s and 22 − 6 + 13 s were obtained for 240 Es and 236 Bk, respectively. Two groups of α particles with energies E α = 8.19 ( 3 ) MeV and 8.09 ( 3 ) MeV were unambiguously assigned to 240 Es. Electron-capture delayed fission branches with probabilities of 0.16 ( 6 ) and 0.04 ( 2 ) were measured for 240 Es and 236 Bk, respectively. These new data show a continuation of the exponential increase of ECDF probabilities in more neutron-deficient isotopes.
- Subjects :
- Electron-capture delayed fission
Nuclear and High Energy Physics
Electron capture
Fission
Fusion–evaporation reaction
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
236 Bk
01 natural sciences
7. Clean energy
Recoil separator
Nuclear physics
fusion-evaporation reactions
236Bk
240Es
240 Es
0103 physical sciences
ddc:530
010306 general physics
α decay
isotopes
Physics
Isotope
ta114
Isotopes with mass 236–240
010308 nuclear & particles physics
lcsh:QC1-999
Exponential function
Bk
mass
Atomic physics
Saturation (chemistry)
Fusion–evaporation reactions
α particles
lcsh:Physics
Radioactive decay
Subjects
Details
- Language :
- English
- ISSN :
- 03702693
- Database :
- OpenAIRE
- Journal :
- Physics Letters B, Physics Letters B, Elsevier, 2017, 764, pp.265-270. ⟨10.1016/j.physletb.2016.11.038⟩, Phys.Lett.B, Phys.Lett.B, 2017, 764, pp.265-270. ⟨10.1016/j.physletb.2016.11.038⟩, Physics letters / B 764, 265-270 (2017). doi:10.1016/j.physletb.2016.11.038, Physics Letters B, Vol 764, Iss C, Pp 265-270 (2017)
- Accession number :
- edsair.doi.dedup.....b7d6a26413816f8cf0f3bb03859df564