Further Measurements of Gamma Transitions in Spontaneous-Fission Fragments ofCf252

1972 ◽  
Vol 5 (3) ◽  
pp. 1015-1030 ◽  
Author(s):  
F. F. Hopkins ◽  
J. R. White ◽  
G. W. Phillips ◽  
C. Fred Moore ◽  
Patrick Richard
Keyword(s):  
Spontaneous Fission ◽  
Fission Fragments ◽  
Gamma Transitions

The energy distribution of Cm244 spontaneous-fission fragments

1963 ◽  
Vol 15 (3) ◽  
pp. 955-955 ◽  
Author(s):  
L. Z. Malkin ◽  
I. D. Alkhazov ◽  
A. S. Krivokhatskii ◽  
K. A. Petrzhak ◽  
L. M. Belov
Keyword(s):  
Energy Distribution ◽  
Spontaneous Fission ◽  
Fission Fragments

Identification of Gamma Transitions from He and Be Ternary Fission Fragments

2003 ◽  
Vol 18 (2-4) ◽  
pp. 383-391
Author(s):  
J.K. Hwang ◽  
D. Fong ◽  
A.V. Ramayya ◽  
al. et
Keyword(s):  
Ternary Fission ◽  
Fission Fragments ◽  
Gamma Transitions

MASS, KINETIC ENERGY AND NEUTRON EMISSION OF FISSION FRAGMENTS IN SPONTANEOUS FISSION OF 252Cf, 244Cm AND 248Cm

2000 ◽  
Author(s):  
V.A. KALININ ◽  
V.N. DUSHIN ◽  
B.F. PETROV ◽  
V.A. JAKOVLEV ◽  
A.S. VOROBYEV ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Spontaneous Fission ◽  
Neutron Emission ◽  
Fission Fragments

scholarly journals Neutron anisotropic evaporation and scission emission in fission

2018 ◽  
Vol 193 ◽  
pp. 03001 ◽  
Author(s):  
L. Stuttgé ◽  
A. Chietera ◽  
F. Gönnenwein ◽  
Yu. Kopatch ◽  
M. Mutterer ◽  
...  
Keyword(s):  
Spontaneous Fission ◽  
New Method ◽  
Fission Fragments ◽  
Ionisation Chamber ◽  
Neutron Evaporation ◽  
Standing Problem

Experimental neutron distributions have been investigated in the spontaneous fission of 252Cf at IPHC in Strasbourg. The CORA experiment associating the CODIS twin ionisation chamber and the neutron multi-detector DEMON aimed to solve an long-standing problem in fission: the possible emission of scission neutrons and/or the presence of a dynamical anisotropy in the neutron evaporation by the moving fission fragments. A new method allowing to establish the dynamical anisotropy in an independent way is presented. The results obtained from a comparison with simulations based on GEANT4 are shown.

Observed mass distribution of spontaneous fission fragments from samples of lime—an SSNTD study

1999 ◽  
Vol 30 (6) ◽  
pp. 699-701 ◽  
Author(s):  
Debasish Paul ◽  
J.C. Majumdar ◽  
Debasis Ghose ◽  
R.C. Sastri
Keyword(s):  
Mass Distribution ◽  
Spontaneous Fission ◽  
Fission Fragments

scholarly journals Determining spontaneous fission properties by direct mass measurements with the FRS Ion Catcher

2020 ◽  
Vol 239 ◽  
pp. 02004
Author(s):  
Israel Mardor ◽  
Timo Dickel ◽  
Daler Amanbayev ◽  
Samuel Ayet San Andrés ◽  
Sönke Beck ◽  
...  
Keyword(s):  
Spontaneous Fission ◽  
Mass Measurement ◽  
Direct Method ◽  
Essential Element ◽  
Product Yield ◽  
Resolving Power ◽  
Relative Mass ◽  
Capture Process ◽  
Fission Fragments ◽  
Tof Ms

We present a direct method to measure fission product yield distributions (FPY) and isomeric yield ratios (IYR) for spontaneous fission (SF) fragments. These physical properties are of utmost importance to the understanding of basic nuclear physics, the astrophysical rapid neutron capture process ('r process') of nucleosynthesis, neutron star composition, and nuclear reactor safety. With this method, fission fragments are produced by spontaneous fission from a source that is mounted in a cryogenic stopping cell (CSC), thermalized and stopped within it, and then extracted and transported to a multiple-reflection time-of-flight mass-spectrometer (MR-TOF-MS). We will implement the method at the FRS Ion Catcher (FRS-IC) at GSI (Germany), whose MR-TOF-MS relative mass accuracy (~ 10-7) and resolving power (~ 600,000 FWHM) are sufficient to separate all isobars and numerous isomers in the fission fragment realm. The system's essential element independence and its fast simultaneous mass measurement provide a new direct way to measure isotopic FPY distributions, which is complementary to existing methods. It will enable nuclide FPY measurements in the high fission peak, which is hardly accessible by current techniques. The extraction time of the CSC, tens of milliseconds, enables a direct measurement of independent fission yields, and a first study of the temporal dependence of FPY distributions in this duration range. The ability to resolve isomers will further enable direct extraction of numerous IYRs while performing the FPY measurements. The method has been recently demonstrated at the FRS-ICr for SF with a 37 kBq 252Cf fission source, where about 70 different fission fragments have been identified and counted. In the near future, it will be used for systematic studies of SF with a higher-activity 252Cf source and a 248Cm source. The method can be implemented also for neutron induced fission at appropriate facilities.

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