Impact of prompt-neutron corrections on final fission-fragment distributions

2012 ◽  
Vol 86 (5) ◽  
Author(s):  
A. Al-Adili ◽  
F.-J. Hambsch ◽  
S. Pomp ◽  
S. Oberstedt
Keyword(s):  
Fission Fragment ◽  
Prompt Neutron

scholarly journals Prompt Fission Neutron Investigation in 235U(nth,f) and 252Cf(sf) Reactions

2019 ◽  
Vol 211 ◽  
pp. 04003 ◽  
Author(s):  
Shakir Zeynalov ◽  
Pavel Sedyshev ◽  
Valery Shvetsov ◽  
Olga Sidorova
Keyword(s):  
Kinetic Energy ◽  
Fission Fragment ◽  
Ionization Chamber ◽  
Neutron Emission ◽  
Digital Signal ◽  
Fission Neutron ◽  
Sampling Frequency ◽  
Prompt Neutron ◽  
Prompt Fission ◽  
Prompt Fission Neutron

The prompt neutron emission in thermal neutron induced fission of 235U and spontaneous fission of 252Cf was investigated by using digital signal electronics. The goal was to check a new revised data analysis software with fission fragment (FF) kinetic energy corrections after prompt fission neutron (PFN) emission. The revised software was used to reanalyze old data measured in EC-JRC-IRMM, where 252Cf(sf) reaction was investigated. Both measurements were done using similar twin Frisch grid ionization chamber for fission fragment detection with equivalent NE213 fast neutron detector. About 0.5*106 FF with PFN coincidences have been analyzed in both measurements. The fission fragment kinetic energy, mass and angular distribution were investigated along with prompt neutron time of flight and pulse shape analysis using a six channel synchronous waveform digitizer (WFD) with sampling frequency of 250 MHz and 12 bit resolution in the 235U(nth,f) reaction. Similar WFD with sampling frequency of 100 MHz was used for PFN investigation in 252Cf(sf) reaction. These two experiments were considered as a reference for further investigations with a new setup composed of position sensitive ionization chamber to detect FF and an array of 32 liquid scintillators recently constructed in Dubna to detect neutrons.

Sensitivity of Prompt Neutron Multiplicity to Fission Fragment Characteristics

2015 ◽  
Vol 181 (3) ◽  
pp. 289-301 ◽  
Author(s):  
A. Tudora ◽  
F.-J. Hambsch ◽  
S. Oberstedt ◽  
G. Giubega ◽  
I. Visan
Keyword(s):  
Fission Fragment ◽  
Neutron Multiplicity ◽  
Prompt Neutron

scholarly journals Implementing and testing theoretical fission fragment yields in a Hauser-Feshbach statistical decay framework

2018 ◽  
Vol 169 ◽  
pp. 00006 ◽  
Author(s):  
Patrick Jaffke ◽  
Peter Möller ◽  
Ionel Stetcu ◽  
Patrick Talou ◽  
Christelle Schmitt
Keyword(s):  
Kinetic Energy ◽  
Potential Energy ◽  
Potential Energy Surface ◽  
Fission Fragment ◽  
Energy Surface ◽  
Prompt Neutron ◽  
Fission Fragments ◽  
Statistical Decay ◽  
Γ Ray ◽  
The Impact

We implement fission fragment yields, calculated using Brownian shape-motion on a macroscopic-microscopic potential energy surface in six dimensions, into the Hauser-Feshbach statistical decay code CGMF. This combination allows us to test the impact of utilizing theoretically-calculated fission fragment yields on the subsequent prompt neutron and γ-ray emission. We draw connections between the fragment yields and the total kinetic energy TKE of the fission fragments and demonstrate that the use of calculated yields can introduce a difference in the 〈TKE〉 and, thus, the prompt neutron multiplicity v, as compared with experimental fragment yields. We deduce the uncertainty on the 〈TKE〉 and v from this procedure and identify possible applications.

scholarly journals Prompt and Delayed Neutron Emissions and Fission Product Yield Calculations with Hauser-Feshbach Statistical Decay Theory and Summation Calculation Method

2019 ◽  
Vol 211 ◽  
pp. 04005 ◽  
Author(s):  
Shin Okumura ◽  
Toshihiko Kawano ◽  
Satoshi Chiba
Keyword(s):  
Fission Product ◽  
Fission Fragment ◽  
Neutron Emission ◽  
Product Yield ◽  
Prompt Neutron ◽  
Delayed Neutron ◽  
Statistical Decay ◽  
Fission Product Yield ◽  
Neutron Multiplicities ◽  
D Model

We demonstrate the neutron emission and fission product yield calculations using the Hauser–Feshbach Fission Fragment Decay (HF3D) model and β decay. The HF3D model calculates the statistical decay of more than 500 primary fission fragment pairs formed by the neutron induced fission of 235U. In order to calculate the prompt neutron and photon emissions, the primary fission fragment distributions, i.e. mass, charge, excitation energy, spin and parity are deterministically generated and numerically integrated for all fission fragments. The calculated prompt neutron multiplicities, independent fission product yield are fully consistent each other. We combine the β-decay and the summation calculations with the HF3D model calculation to obtain the cumulative fission product yield, decay heat and delayed neutron yield. The calculated fission observables are compared with available experimental data.

Fission Fragment Energy Spectrum after Prompt Neutron Emission

1965 ◽  
Vol 20 (1) ◽  
pp. 176-177 ◽  
Author(s):  
Hisao Kobayashi ◽  
Atsushi Nakamoto ◽  
Masanao Hosoe
Keyword(s):  
Energy Spectrum ◽  
Fission Fragment ◽  
Neutron Emission ◽  
Prompt Neutron

Fission Fragment Yield, Cross Section and Prompt Neutron and Gamma Emission Data from Actinide Isotopes

2014 ◽  
Vol 119 ◽  
pp. 38-41 ◽  
Author(s):  
F.-J. Hambsch ◽  
S. Oberstedt ◽  
A. Al-Adili ◽  
T. Brys ◽  
R. Billnert ◽  
...  
Keyword(s):  
Cross Section ◽  
Fission Fragment ◽  
Prompt Neutron ◽  
Gamma Emission ◽  
Emission Data ◽  
Fragment Yield

Fission-fragment yields and prompt-neutron multiplicity for Coulomb-induced fission of U234,235 and Np237,238

2021 ◽  
Vol 104 (4) ◽  
Author(s):  
J.-F. Martin ◽  
J. Taïeb ◽  
G. Boutoux ◽  
A. Chatillon ◽  
T. Gorbinet ◽  
...  
Keyword(s):  
Fission Fragment ◽  
Neutron Multiplicity ◽  
Prompt Neutron ◽  
Induced Fission
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