scholarly journals High resolution gamma-ray spectroscopy of fast-neutron induced fission

2021 ◽  
Vol 256 ◽  
pp. 00019
Author(s):  
Jonathan Wilson ◽  
Damien Thisse ◽  
Matthieu Lebois ◽  
Nikola Jovancevic ◽  
Rhiann Canavan ◽  
...  
Keyword(s):  
Fast Neutron ◽  
Gamma Ray ◽  
Precision Spectroscopy ◽  
Fast Timing ◽  
Experimental Campaign ◽  
Γ Rays ◽  
Fission Neutrons ◽  
Induced Fission ◽  
Multiplicity Distributions ◽  
Prompt Fission

Experiments to perform precision spectroscopy of fast neutron induced fission were carried out during the ν-Ball experimental campaign at the ALTO facility of IJC Laboratory Orsay. Low energy fission of 232Th(n,f), 238U(n,f) and spontaneous fission of 252Cf were studied using this hybrid highresolution spectrometer and calorimeter. New observables such as γ-ray multiplicity distributions correlated with specific fission fragments are presented and discussed. A new method using fast-timing techniques to detect prompt fission neutrons in coincidence with prompt fission γ-rays is described.

scholarly journals Potential of prompt $$\gamma $$-ray emission studies in fast-neutron induced fission: a first step

2020 ◽  
Vol 56 (3) ◽  
Author(s):  
L. Qi ◽  
C. Schmitt ◽  
M. Lebois ◽  
A. Oberstedt ◽  
S. Oberstedt ◽  
...  
Keyword(s):  
Fast Neutron ◽  
Gamma Ray ◽  
Prompt Gamma ◽  
Induced Fission ◽  
Gamma Ray Emission ◽  
Emission Studies

Prompt Fission Neutrons and γ Rays

2014 ◽  
Vol 118 ◽  
pp. 195-198 ◽  
Author(s):  
P. Talou ◽  
T. Kawano ◽  
I. Stetcu
Keyword(s):  
Γ Rays ◽  
Fission Neutrons ◽  
Prompt Fission

scholarly journals Prompt fission gamma-ray emission spectral data for 239Pu(n,f) using fast directional neutrons from the LICORNE neutron source

2018 ◽  
Vol 169 ◽  
pp. 00018 ◽  
Author(s):  
L. Qi ◽  
J.N. Wilson ◽  
M. Lebois ◽  
A. Al-Adili ◽  
A. Chatillon ◽  
...  
Keyword(s):  
Neutron Source ◽  
Gamma Rays ◽  
Gamma Ray ◽  
Average Energy ◽  
Fast Neutrons ◽  
Complementary Information ◽  
Total Energy Release ◽  
The Mean ◽  
Induced Fission ◽  
Prompt Fission

Prompt fission gamma-ray spectra (PFGS) have been measured for the 239Pu(n,f) reaction using fast neutrons at Ēn=1.81 MeV produced by the LICORNE directional neutron source. The setup makes use of LaBr3 scintillation detectors and PARIS phoswich detectors to measure the emitted prompt fission gamma rays (PFG). The mean multiplicity, average total energy release per fission and average energy of photons are extracted from the unfolded PFGS. These new measurements provide complementary information to other recent work on thermal neutron induced fission of 239Pu and spontaneous fission of 252Cf.

scholarly journals Prompt Fission Gamma-Ray Measurements at UML Research Reactor

2020 ◽  
Vol 242 ◽  
pp. 01009
Author(s):  
Razvan Stanescu ◽  
Hadrick Green ◽  
Toby Morris ◽  
Gencho Rusev ◽  
Marian Jandel
Keyword(s):  
Gamma Rays ◽  
Research Reactor ◽  
Gamma Ray ◽  
Fission Neutron ◽  
Pulse Shape Discrimination ◽  
Prompt Gamma ◽  
Fission Reaction ◽  
Induced Fission ◽  
Enriched Uranium ◽  
Prompt Fission

Neutron-induced fission of 235U was studied at the thermal column of the UMass Lowell 1 MW Research Reactor. A collimated, 2.25-inch diameter beam of thermal neutrons with the flux of ~5x105 n/cm2/sec induced fission reaction on a plate of low-enriched uranium with the areal density ~25 mg/cm2 of 235U. We have used the prompt fission-neutron tagging method to identify the fission reaction in the off-line analysis. The method employs the pulse-shape discrimination of neutrons and gamma-ray events in stilbene scintillator and enables identification of coincidence events of prompt fission gamma-rays and prompt fission neutrons in coincidence time intervals less than 20-30 ns. The prompt gamma-ray radiation was detected using two co-linear NaI(Tl) detectors. The measured spectra of prompt-fission gamma rays between 150 keV and 6 MeV are presented. The results from these initial measurements demonstrate the feasibility of the experimental method. Future measurements with extended arrays of detectors are planned.

scholarly journals The study of prompt fission γ rays at the Oslo Cyclotron Laboratory

2021 ◽  
Vol 256 ◽  
pp. 00005
Author(s):  
D. Gjestvang ◽  
S. Siem ◽  
F. Zeiser ◽  
J. Randrup ◽  
R. Vogt ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Charged Particle ◽  
Coincidence Spectrum ◽  
Fission Reaction ◽  
Plutonium Isotopes ◽  
Fission Process ◽  
Γ Rays ◽  
Induced Fission ◽  
Prompt Fission ◽  
Current Modelling

The study of prompt fission γ rays (PFGs) is crucial for understanding the energy and angular momentum distribution in fission, and over the last decade there has been an revived interest in this aspect of fission. We present the new experimental setup at the Oslo Cyclotron Laboratory for detecting PFGs resulting from charged particle-induced fission. Additionally, PFGs from the reaction 240Pu(d,pf) were measured in April 2018, and the fission gated proton-γ coincidence spectrum is shown. In order to explore the dependence of the PFG emission on the excitation energy and angular momentum of the compound nucleus, we plan several experiments where charged particle reactions are used to induce fission in various plutonium isotopes. The final results will be compared to predictions made by the Fission Reaction Event Yield Algorithm (FREYA) in an upcoming publication, to benchmark the current modelling of both the PFGs and the fission process.

scholarly journals Analysis of prompt fission neutrons in235U(nth,f) and fission fragment distributions for the thermal neutron induced fission of234U

2016 ◽  
Vol 122 ◽  
pp. 01007 ◽  
Author(s):  
A. Al-Adili ◽  
D. Tarrío ◽  
F.-J. Hambsch ◽  
A. Göök ◽  
K. Jansson ◽  
...  
Keyword(s):  
Thermal Neutron ◽  
Fission Fragment ◽  
Fission Neutrons ◽  
Induced Fission ◽  
Prompt Fission

Prompt fission neutron spectra in fast-neutron-induced fission ofU238

2015 ◽  
Vol 92 (1) ◽  
Author(s):  
V. V. Desai ◽  
B. K. Nayak ◽  
A. Saxena ◽  
S. V. Suryanarayana ◽  
R. Capote
Keyword(s):  
Fast Neutron ◽  
Fission Neutron ◽  
Neutron Spectra ◽  
Induced Fission ◽  
Prompt Fission ◽  
Prompt Fission Neutron
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