scholarly journals THE ANGULAR DISTRIBUTION OF FISSION FRAGMENTS FROM THE FAST NEUTRON-INDUCED FISSION OF U-234 (thesis)

1962 ◽  
Author(s):  
R.W. Lamphere
Keyword(s):  
Angular Distribution ◽  
Fast Neutron ◽  
Fission Fragments ◽  
Induced Fission

Angular Distribution of Fission Fragments from 22-Mev Proton-Induced Fission ofU238,U235,U233,Th232, andTh230

1955 ◽  
Vol 98 (3) ◽  
pp. 685-687 ◽  
Author(s):  
B. L. Cohen ◽  
B. L. Ferrell-Bryan ◽  
D. J. Coombe ◽  
M. K. Hullings
Keyword(s):  
Angular Distribution ◽  
Fission Fragments ◽  
Induced Fission

MEASUREMENT OF FISSION FRAGMENT ANISOTROPIES FOR PROTON-INDUCED FISSION OF TWO PRE-ACTINIDE NUCLEI AT SEVERAL ENERGIES

2007 ◽  
Vol 22 (05) ◽  
pp. 1027-1037 ◽  
Author(s):  
S. SOHEYLI ◽  
H. NOSHAD ◽  
M. LAMEHI-RACHTI
Keyword(s):  
Angular Distribution ◽  
Statistical Model ◽  
Cross Sections ◽  
Fission Fragment ◽  
Anomalous Behavior ◽  
Surface Barrier ◽  
Mass Asymmetry ◽  
Fission Fragments ◽  
Induced Fission ◽  
Barrier Detectors

The angular distribution of fission fragments has been measured for proton-induced fission of 197 Au and 209 Bi nuclei at several energies between 25 and 30 MeV using surface-barrier detectors. The measured anisotropies are found to be in agreement with the predictions of the standard saddle-point statistical model. The measured anisotropies for neither of the nuclei show any anomalous behavior as a function of both energy and entrance channel mass asymmetry. The fission cross sections of 197 Au and 209 Bi nuclei were also measured and compared with that of the previous works.

scholarly journals The v-Ball campaign at ALTO: Study for neural network based trigger for fission process

2021 ◽  
Vol 256 ◽  
pp. 00008
Author(s):  
Matthieu Lebois ◽  
Nikola Jovančević ◽  
Damien Thisse ◽  
Jonathan Wilson ◽  
Rhiann Canavan ◽  
...  
Keyword(s):  
Neural Network ◽  
Neural Networks ◽  
Data Analysis ◽  
Fast Neutron ◽  
Large Fraction ◽  
Fission Process ◽  
Fission Event ◽  
Fission Fragments ◽  
Event Reconstruction ◽  
Induced Fission

A γ-spectroscopy campaign named “ν-Ball” was perfomed at the ALTO facility. A large fraction of the beam time was dedicated to the fast neutron induced fission of two fissioning systems: 232Th and 238U. During the data analysis, it was noticed that the high activity of the natTh was heavily contaminating any coincidence matrices (or cubes) built. This caused the identification of weakly produced fission fragments identification to be almost impossible. It was decided to explore the opportunity opened by new analysis methods based on neural networks algorithms. In this paper, the methods to build an adequate neural network and the results obtained for fission event reconstruction are presented.

scholarly journals Lifetime measurement around 132Sn with the ν-Ball array

2020 ◽  
Vol 1643 (1) ◽  
pp. 012135
Author(s):  
G Häfner ◽  
R Lozeva ◽  
A Blazhev ◽  
R L Canavan ◽  
D Etasse ◽  
...  
Keyword(s):  
High Resolution ◽  
Fast Neutron ◽  
Scintillation Detectors ◽  
Tandem Accelerator ◽  
Lifetime Measurements ◽  
Fission Fragments ◽  
Hpge Detectors ◽  
Induced Fission ◽  
Γ Ray ◽  
Actinide Targets

Abstract Neutron-rich nuclei were studied after fast neutron-induced fission of 238U and 232Th at the ALTO facility in Orsay, France. The neutrons were produced with the LICORNE directional neutron source using a pulsed 7Li beam provided by the Tandem accelerator. The actinide targets were surrounded by the ν-Ball array to measure the de-excitation of fission fragments. The ν-Ball array is a hybrid spectrometer which consists of HPGe detectors (equipped with BGO shielding) and LaBr3(Ce) scintillation detectors allowing for high-resolution γ-ray spectroscopy and lifetime measurements in the ns/sub-ns range. This contribution presents preliminary results on 134Te and 137I populated in the 238U(n,f) reaction.

ALPHA DECAY AND FISSION OF ALIGNED NUCLEI

1960 ◽  
Vol 38 (2) ◽  
pp. 290-314 ◽  
Author(s):  
N. R. Steenberg ◽  
R. C. Sharma
Keyword(s):  
Angular Distribution ◽  
High Temperature ◽  
Experimental Work ◽  
Low Temperatures ◽  
Alpha Decay ◽  
Alpha Particles ◽  
Nuclear Shape ◽  
Fission Fragments ◽  
Partial Waves ◽  
High Temperature Approximation

The theory of the angular distribution of alpha particles and of fission fragments from nuclei aligned at low temperatures is presented. Very explicit results are obtained in the high temperature approximation. These are directly dependent upon the branching which takes place to the various allowed partial waves. This branching is influenced by the nuclear shape, but it is shown that for this problem the effect of penetrating a spheroidal barrier is not critical. An application is made to the experimental work so far available and the result is reasonably satisfactory.

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