Effect of slight displacement of the medium in the front of A neutron-induced fission wave on its velocity

Atomic Energy ◽  
1992 ◽  
Vol 72 (3) ◽  
pp. 268-269
Author(s):  
A. A. Kostritsa
Keyword(s):  
Induced Fission ◽  
Slight Displacement ◽  
Fission Wave

scholarly journals From fission yield measurements to evaluation: status on statistical methodology for the covariance question

2018 ◽  
Vol 4 ◽  
pp. 26 ◽  
Author(s):  
Brieuc Voirin ◽  
Grégoire Kessedjian ◽  
Abdelaziz Chebboubi ◽  
Sylvain Julien-Laferrière ◽  
Olivier Serot
Keyword(s):  
Statistical Tests ◽  
Fission Products ◽  
Experimental Program ◽  
Mass Yield ◽  
Statistical Methodology ◽  
Fission Yield ◽  
Fission Process ◽  
Induced Fission ◽  
Entropy Criterion ◽  
Fission Yields

Studies on fission yields have a major impact on the characterization and the understanding of the fission process and are mandatory for reactor applications. Fission yield evaluation represents the synthesis of experimental and theoretical knowledge to perform the best estimation of mass, isotopic and isomeric yields. Today, the output of fission yield evaluation is available as a function of isotopic yields. Without the explicitness of evaluation covariance data, mass yield uncertainties are greater than those of isotopic yields. This is in contradiction with experimental knowledge where the abundance of mass yield measurements is dominant. These last years, different covariance matrices have been suggested but the experimental part of those are neglected. The collaboration between the LPSC Grenoble and the CEA Cadarache starts a new program in the field of the evaluation of fission products in addition to the current experimental program at Institut Laue-Langevin. The goal is to define a new methodology of evaluation based on statistical tests to define the different experimental sets in agreement, giving different solutions for different analysis choices. This study deals with the thermal neutron induced fission of 235U. The mix of data is non-unique and this topic will be discussed using the Shannon entropy criterion in the framework of the statistical methodology proposed.

Cumulative yields of stable and long-lived isotopes of tin in neutron-induced fission

1983 ◽  
Vol 61 (11) ◽  
pp. 1490-1497 ◽  
Author(s):  
K. J. R. Rosman ◽  
J. R. De Laeter ◽  
J. W. Boldeman ◽  
H. G. Thode
Keyword(s):  
Stable Isotopes ◽  
Fine Structure ◽  
Fission Product ◽  
Mass Spectrometer ◽  
Smooth Curve ◽  
Mass Region ◽  
Neutron Fission ◽  
Source Mass ◽  
Induced Fission ◽  
Fission Yields

The relative cumulative fission yields of the six stable isotopes of tin (117Sn,118Sn, 119Sn, 120Sn, 122Sn, and 124Sn) and the long-lived isotope 126Sn have been measured in the thermal and epicadium neutron fission of 233U and 235U, and the epicadium neutron fission of 238U. Nanogram-sized fission product tin samples were extracted from irradiated uranium samples and analyzed in a solid source mass spectrometer. In each case a smooth curve can be drawn through the yield points of the seven isotopes of tin. There is, therefore, no evidence of "fine structure" in the 117 ≤ A ≤ 126 portion of the symmetric mass region.

Discontinuity in Isotopic Mass Dispersion in Thermal-Neutron-Induced Fission ofU235

1970 ◽  
Vol 2 (6) ◽  
pp. 2403-2405 ◽  
Author(s):  
M. Talât-Erben ◽  
Binay Dağsöz (Güven)
Keyword(s):  
Thermal Neutron ◽  
Mass Dispersion ◽  
Induced Fission

Erratum: Measurement of the neutrons emitted in the proton-induced fission ofBi209andU238at 475 MeV

1991 ◽  
Vol 44 (5) ◽  
pp. 2239-2239
Author(s):  
Z. Fraenkel ◽  
A. Breskin ◽  
R. Chechik ◽  
S. Wald ◽  
R. Abegg ◽  
...  
Keyword(s):  
Induced Fission

scholarly journals Calculation of muon final probabilities after muon-induced fission in a four-state basis

1981 ◽  
Vol 106 (3) ◽  
pp. 159-162 ◽  
Author(s):  
Zhong-yu Ma ◽  
Xi-zhen Wu ◽  
Jing-shang Zhang ◽  
Yi-zhong Zhuo ◽  
J.O. Rasmussen
Keyword(s):  
Induced Fission

Cold events in thermal-neutron-induced fission of heavy nuclei

1999 ◽  
Vol 4 (1) ◽  
pp. 51-59
Author(s):  
A. Díaz-Torres ◽  
F. Guzmán-Martínez ◽  
O. Rodríguez-Hoyos
Keyword(s):  
Thermal Neutron ◽  
Heavy Nuclei ◽  
Cold Events ◽  
Induced Fission
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