Simulating the neutron-fission spectrum with a Po-Be source

1969 ◽  
Vol 27 (2) ◽  
pp. 876-877
Author(s):  
V. A. Kryzhanovskii ◽  
V. V. Terekhin
Keyword(s):  
Neutron Fission ◽  
Fission Spectrum ◽  
Neutron Fission Spectrum

scholarly journals Transuranics Transmutation Using Neutrons Spectrum from Spallation Reactions

2015 ◽  
Vol 2015 ◽  
pp. 1-23 ◽  
Author(s):  
Maurício Gilberti ◽  
Claubia Pereira ◽  
Maria Auxiliadora F. Veloso ◽  
Antonella Lombardi Costa
Keyword(s):  
Simple Model ◽  
Neutron Spectrum ◽  
Hybrid System ◽  
Target Material ◽  
Neutron Fission ◽  
Spallation Target ◽  
Transport Code ◽  
Spallation Reactions ◽  
Fission Spectrum ◽  
Neutron Fission Spectrum

The aim is to analyse the neutron spectrum influence in a hybrid system ADS-fission inducing transuranics (TRUs) transmutation. A simple model consisting of an Accelerator-Driven Subcritical (ADS) system containing spallation target, moderator or coolant, and spheres of actinides, “fuel,” at different locations in the system was modelled. The simulation was performed using the MCNPX 2.6.0 particles transport code evaluating capture(n,γ)and fission(n,f)reactions, as well as the burnup of actinides. The goal is to examine the behaviour and influences of the hard neutron spectrum from spallation reactions in the transmutation, without the contribution or interference of multiplier subcritical medium, and compare the results with those obtained from the neutron fission spectrum. The results show that the transmutation efficiency is independent of the spallation target material used, and the neutrons spectrum from spallation does not contribute to increased rates of actinides transmutation even in the vicinity of the target.

Cumulative Yields of the Heavy Fragments in the Fast Neutron Fission of 238U

1972 ◽  
Vol 50 (24) ◽  
pp. 3100-3110 ◽  
Author(s):  
C. K. Mathews ◽  
R. H. Tomlinson
Keyword(s):  
Isotope Dilution ◽  
Mass Range ◽  
Mass Region ◽  
Mass Spectrometric ◽  
Spectrometric Method ◽  
Mass Spectrometric Method ◽  
Neutron Fission ◽  
Fission Spectrum ◽  
Isotopic Abundances ◽  
Fission Yields

Isotopic abundances of the elements xenon, cesium, barium, cerium, neodymium, and samarium formed in the fast (fission spectrum) neutron fission of 238U have been measured using the mass spectrometric method. These ratios were normalized with respect to each other through isobaric nuclides and isotope dilution to obtain the relative yields of isobaric chains in the heavy mass region. By normalizing the heavy mass yields to 100%, the absolute fission yields of 20 chains in the 130–154 mass range were determined.

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.

Antimutagenic Effects of Radioprotector WR-2721 Against Fission-spectrum Neutrons and60Co γ-rays in Mice

1992 ◽  
Vol 61 (3) ◽  
pp. 387-392 ◽  
Author(s):  
Y. Kataoka ◽  
I. Basic ◽  
J. Perrin ◽  
D.J. Grdina
Keyword(s):  
Fission Spectrum ◽  
Γ Rays

Energy Distribution of Mass-97 Fission Fragments from Thermal-Neutron Fission of Uranium-235

1956 ◽  
Vol 104 (4) ◽  
pp. 1046-1053 ◽  
Author(s):  
Bernard L. Cohen ◽  
Anna Foner Cohen ◽  
Charles D. Coley
Keyword(s):  
Energy Distribution ◽  
Thermal Neutron ◽  
Neutron Fission ◽  
Fission Fragments ◽  
Thermal Neutron Fission

Measurements of Neutron Fission Cross Sections of237Np,240Pu,241Pu,242Pu,244Pu, and241Am at 14.7 MeV

1986 ◽  
Vol 94 (1) ◽  
pp. 42-45 ◽  
Author(s):  
K. Gul ◽  
M. Ahmad ◽  
M. Anwar ◽  
S. M. Saleem
Keyword(s):  
Cross Sections ◽  
Neutron Fission

Angular correlation of neutrons from thermal-neutron fission of 235U

1978 ◽  
Vol 78 (5) ◽  
pp. 564-567 ◽  
Author(s):  
C.B. Franklyn ◽  
C. Hofmeyer ◽  
D.W. Mingay
Keyword(s):  
Thermal Neutron ◽  
Angular Correlation ◽  
Neutron Fission ◽  
Thermal Neutron Fission
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