scholarly journals Total Kinetic Energy and Fragment Mass Distribution of Neutron-Induced Fission of U-233

2017 ◽  
Author(s):  
Daniel James Higgins ◽  
Kyle Thomas Schmitt ◽  
Shea Morgan Mosby ◽  
Fredrik Tovesson
Keyword(s):  
Kinetic Energy ◽  
Mass Distribution ◽  
Total Kinetic Energy ◽  
Fragment Mass ◽  
Induced Fission

scholarly journals Three Exit Channels in the Fission of 235U(n, f)

1987 ◽  
Vol 42 (8) ◽  
pp. 786-790 ◽  
Author(s):  
H.-H. Knitter ◽  
F.-J. Hambsch ◽  
C. Budtz-Jørgensen ◽  
J. P. Theobald
Keyword(s):  
Kinetic Energy ◽  
Coordinate System ◽  
Thermal Neutron ◽  
Fission Fragment ◽  
Channel Model ◽  
Total Kinetic Energy ◽  
Fragment Mass ◽  
Theoretical Predictions ◽  
Induced Fission ◽  
Fragment Yield

A formula for the fission fragment yield area in the coordinate system of the fragment total kinetic energy and of the fragment mass is presented. It was deduced along the lines of the multiexit- channel model of fission elaborated by Brosa, Grossmann and Müller. This formula was fitted to the fragment mass-, average total kinetic energy-, and variance distributions of the thermal neutron induced fission of 235U. The obtained parameters are compared with the theoretical predictions. Further improvements of the fragment yield representation are discussed.

scholarly journals Monte Carlo simulation of the measurement by the 2E technique of the average prompt neutron multiplicity as a function of the mass of fragments from thermal neutron-induced fission of 239Pu

2021 ◽  
Vol 68 (1 Jan-Feb) ◽  
Author(s):  
Modesto Montoya ◽  
Oliver Páucar ◽  
A. Obregón ◽  
A. Aponte
Keyword(s):  
Monte Carlo ◽  
Standard Deviation ◽  
Kinetic Energy ◽  
Thermal Neutron ◽  
Neutron Multiplicity ◽  
Total Kinetic Energy ◽  
Prompt Neutron ◽  
Fragment Mass ◽  
Induced Fission ◽  
Experimental Values

Using a Monte Carlo method, we simulate the measurement, by the 2E technique, of the average prompt neutron multiplicity as a function of the mass of fragments from the thermal neutron-induced fission of 239Pu. The input data for the simulation, associated with the primary fragment mass (A), consist of the yield (Y), the distribution of the total kinetic energy characterized by its average ((TKE) ̅) and its standard deviation (σ_TKE), the average prompt neutron multiplicity (ν ̅_s, a sawtooth approach of experimental data), and the slope of neutron multiplicity against total kinetic energy (dν_s/d<TKE>). The output data, associated with the simulated as the fragment mass measured by the 2E technique (µ), consist of the yield (y), the distribution of the total kinetic energy characterized by its average ((tke) ̅) and its standard deviation (σ_tke), and the average prompt neutron multiplicity (ν ̅_µ). In the mass regions A≈115 and A>150, ν ̅_µ is higher than ν ̅_s. This result suggests that, in those mass regions, the 2E experimental values associated with the average neutron multiplicity are overestimated, referred to the corresponding to the primary fragments.

Study of photofission fragment mass distribution of 232Th, 238U, 237Np and 240Pu isotopes in various γ-ray energies

2018 ◽  
Vol 27 (03) ◽  
pp. 1850018 ◽  
Author(s):  
M. R. Pahlavani ◽  
P. Mehdipour
Keyword(s):  
Experimental Data ◽  
Satisfactory Agreement ◽  
Mass Distribution ◽  
Fission Fragment ◽  
Scission Point ◽  
Fragment Mass ◽  
Pu Isotopes ◽  
Induced Fission ◽  
Γ Ray ◽  
Peak To Valley Ratio

Photofission of [Formula: see text]Th, [Formula: see text]U, [Formula: see text]Np and [Formula: see text]Pu isotopes are investigated. Modified version of Gorodisskiy approach that is developed to study the neutron-induced fission are employed to simulate fission fragment mass distribution for these isotopes in different energies. The effect of emitted neutron prior to scission point is studied. Peak to valley ratio is also extracted. Obtained results using this approach are compared with original Gorodisskiy model as well as available experimental data. Satisfactory agreement is achieved between theoretical and experimental data especially in medium and low [Formula: see text]-ray energies than original formalism of Gorodisskiy.

scholarly journals Fission fragment yields and total kinetic energy release in neutron-induced fission of235,238U,and239Pu

2018 ◽  
Vol 169 ◽  
pp. 00024 ◽  
Author(s):  
F. Tovesson ◽  
D. Duke ◽  
V. Geppert-Kleinrath ◽  
B. Manning ◽  
D. Mayorov ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Kinetic Energy Release ◽  
Nuclear Fission ◽  
Total Kinetic Energy ◽  
Experimental Techniques ◽  
Science Center ◽  
Fission Process ◽  
Induced Fission ◽  
Time Projection ◽  
Energy Dependent

Different aspects of the nuclear fission process have been studied at Los Alamos Neutron Science Center (LANSCE) using various instruments and experimental techniques. Properties of the fragments emitted in fission have been investigated using Frisch-grid ionization chambers, a Time Projection Chamber (TPC), and the SPIDER instrument which employs the 2v-2E method. These instruments and experimental techniques have been used to determine fission product mass yields, the energy dependent total kinetic energy (TKE) release, and anisotropy in neutron-induced fission of U-235, U-238 and Pu-239.

PromptKX Rays as a Function of Fragment Mass and Total Kinetic Energy in the Thermal Fission ofU235

1969 ◽  
Vol 188 (4) ◽  
pp. 1909-1915 ◽  
Author(s):  
E. M. BOHN ◽  
B. W. WEHRING ◽  
M. E. WYMAN
Keyword(s):  
Kinetic Energy ◽  
Total Kinetic Energy ◽  
Fragment Mass
Sign in / Sign up

Export Citation Format

Share Document