scholarly journals 234U(n,f) cross section with the FIC detector at CERN (n TOF)

2020 ◽  
Vol 16 ◽  
pp. 175
Author(s):  
D. Karadimos ◽  
... Et al.
Keyword(s):  
Cross Section ◽  
Ionization Chamber ◽  
Reaction Cross Section ◽  
Fission Cross Section ◽  
Reaction Cross ◽  
Analog To Digital ◽  
Analysis Technique ◽  
Induced Fission ◽  
Line Analysis

The analysis technique applied to the data and the reaction cross section 234U(n,f) from the FIC (Fission Ionization Chamber) detector at the n TOF facility is pre- sented here. A comparison of the measured neutron induced fission cross section of 234U nucleus is given with the available data from the bibliography. The measure- ments took place at the installation of CERN in Geneva. The detector was placed in front of the neutron beam for the determination of the neutron induced fission cross section of various isotopes of the Th cycle. For the data acquisition, several flash Analog to Digital Converter (fADC) channels were used. This facilitated the detailed off-line analysis of data since all information was stored in the computer. The automation of the process was required because the high amount of stored data. The data analysis aimed at the discrimination of fission events. For this end we had to deal with three main issues: i) The subtraction of the background, ii) the fitting of the pulses and iii) the automation of the process.

scholarly journals Data analysis of the FIC detector at the n_TOF facility

2019 ◽  
Vol 14 ◽  
pp. 155
Author(s):  
D. Karadimos ◽  
K. Ioannides ◽  
P. Assimakopoulos ◽  
N. Tsagas ◽  
P. Paulopoulos ◽  
...  
Keyword(s):  
Data Analysis ◽  
Cross Section ◽  
Neutron Beam ◽  
Fission Cross Section ◽  
Digital Converter ◽  
Analog To Digital ◽  
Analysis Technique ◽  
Induced Fission ◽  
Line Analysis

The analysis technique applied to the data from the FIC (Fast Induction Chamber) detector at the n_TOF facility is presented here. The measurements took place at the installation of CERN in Geneva. The detector was placed in front of the neutron beam for the determination of the neutron induced fission cross-section of various isotopes of the Th cycle. For the data acquisition, several fADC (flash Analog to Digital Converter) channels were used. This facilitated the detailed off-line analysis of data since all information was stored in the computer. The analysis of the data aimed at the discrimination of fission events. For this end we had to deal with three main issues: (1) The subtraction of the background, (2) the fitting of the pulses and (3) the automation of the process. The analysis pertaining to these issues will be further elucidated here.

scholarly journals Activation cross section of the (n,2n) reaction on Hf isotopes

2019 ◽  
Vol 23 ◽  
pp. 47
Author(s):  
A. Kalamara ◽  
M. Serris ◽  
A. Spiliotis ◽  
D. Sigalos ◽  
N. Patronis ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Reaction Cross Section ◽  
Beam Energy ◽  
Reaction Cross ◽  
Activation Technique ◽  
Incident Neutron ◽  
Activation Cross Section ◽  
Reference Reaction

Cross sections of the 174Hf(n,2n)173Hf and 176Hf(n,2n)175Hf reactions have been experimentally determined relative to the 27Al(n,α)24Na reference reaction at incident neutron energies of 15.3 and 17.1 MeV by means of the activation technique. The irradiations were carried out at the 5 MV tandem T11/25 Accelerator Laboratory of NCSR "Demokritos" with monoenergetic neutron beams provided via the 3H(d,n)4He reaction, using a new Ti-tritiated target of 373 GBq activity. In the determination of the 176Hf(n,2n)175Hf reaction cross section the contamination of the 174Hf(n,γ)175Hf and 177Hf(n,3n)175Hf reactions has been taken into account. Moreover, the neutron beam energy has been studied by means of Monte Carlo simulation codes and the neutron flux has been determined via the 27Al(n,α)24Na reference reaction.

Determination of the237Np(n, 2n) reaction cross section in the core of the BN-350 reactor

1986 ◽  
Vol 61 (5) ◽  
pp. 973-974
Author(s):  
R. K. Goncharov ◽  
A. V. Zvonarev ◽  
V. I. Ivanov ◽  
Yu. A. Kazanskii ◽  
V. P. Netsvet ◽  
...  
Keyword(s):  
Cross Section ◽  
Reaction Cross Section ◽  
Reaction Cross ◽  
The Core

scholarly journals Determination of the fast-neutron-induced fission cross-section of 242Pu at nELBE

2018 ◽  
Vol 169 ◽  
pp. 00009
Author(s):  
Toni Kögler ◽  
Roland Beyer ◽  
Arnd R. Junghans ◽  
Ronald Schwengner ◽  
Andreas Wagner
Keyword(s):  
Fast Neutron ◽  
Cross Section ◽  
Neutron Transport ◽  
Fission Cross Section ◽  
Data Sets ◽  
Fission Rate ◽  
Relative Cross Section ◽  
Neutron Time ◽  
Induced Fission

The fast-neutron-induced fission cross section of 242Pu was determined in the energy range of 0.5 MeV to 10MeV at the neutron time-of-flight facility nELBE. Using a parallel-plate fission ionization chamber this quantity was measured relative to 235U(n,f). The number of target nuclei was thereby calculated by means of measuring the spontaneous fission rate of 242Pu. An MCNP 6 neutron transport simulation was used to correct the relative cross section for neutron scattering. The determined results are in good agreement with current experimental and evaluated data sets.

Determination of the 237Np(n,f) reaction cross section for En = 4.5-5.3 MeV, using a MicroMegas detector assembly

2013 ◽  
Vol 49 (5) ◽  
Author(s):  
M. Diakaki ◽  
M. Kokkoris ◽  
A. Kyrtsos ◽  
E. Skordis ◽  
C. T. Papadopoulos ◽  
...  
Keyword(s):  
Cross Section ◽  
Reaction Cross Section ◽  
Reaction Cross ◽  
Detector Assembly

Determination of 55Mn(n,γ)56Mn reaction cross-section at the neutron energies of 1.12, 2.12, 3.12 and 4.12 MeV

2016 ◽  
Vol 104 (11) ◽  
Author(s):  
Vibha Vansola ◽  
Surjit Mukherjee ◽  
Haladhara Naik ◽  
Saraswatula Venkata Suryanarayana ◽  
Reetuparna Ghosh ◽  
...  
Keyword(s):  
Cross Section ◽  
Reaction Cross Section ◽  
Reaction Cross

AbstractThe

Determination of the 193Ir(n, 2n) reaction cross section and correction methodology for the 191Ir(n,$ \gamma$) contamination

2019 ◽  
Vol 55 (10) ◽  
Author(s):  
A. Kalamara ◽  
N. Patronis ◽  
R. Vlastou ◽  
M. Kokkoris ◽  
S. Chasapoglou ◽  
...  
Keyword(s):  
Cross Section ◽  
Reaction Cross Section ◽  
Reaction Cross

TOWARDS THE DETERMINATION OF THE π-p → f2(1270)n REACTION CROSS-SECTION

1993 ◽  
Vol 08 (25) ◽  
pp. 2343-2350 ◽  
Author(s):  
N. N. ACHASOV ◽  
G. N. SHESTAKOV
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Cross Sections ◽  
Reaction Cross Section ◽  
Branching Ratios ◽  
Reaction Cross ◽  
Precise Estimation ◽  
The One ◽  
Reaction Cross Sections

In this letter, the necessity of a more precise estimation of the data on the reaction π-p → f2(1270)n → π0π0n is mentioned. The total cross-section σ(π-p → f2(1270)n) obtained from the data on the reaction π-p → π0π0n is shown to be approximately three times smaller than that following from the π-p → π+π-n data and also four times smaller than the prediction of the one-pion-exchange model. It is very important to resolve this disagreement because the results on the reaction π-p → f2(1270)n → π0π0n are used directly for the normalization of other reaction cross-sections and determination of branching ratios for some resonances.

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