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.

scholarly journals Relative Yields of Stable Tellurium Isotopes in Neutron-induced Fission

1982 ◽  
Vol 35 (4) ◽  
pp. 385 ◽  
Author(s):  
JR de Laeter ◽  
KJR Rosman ◽  
JW Boldeman
Keyword(s):  
Mass Spectrometry ◽  
Yield Curve ◽  
Mass Range ◽  
Neutron Fission ◽  
Significant Depression ◽  
Isotopic Abundances ◽  
Thermal Neutron Fission ◽  
First Time ◽  
Fission Yields ◽  
Good Agreement

The relative isotopic abundances of four isotopes of tellurium (125, 126, 128 and 130) produced in the thermal neutron fission of 233U and 23SU have been measured for the first time by solid source mass spectrometry. Samples of 233U and 23SU were irradiated in a reactor and chemically separated by ion exchange techniques to permit nanogram-sized samples of fission product tellurium to be analysed mass spectrometrically. The results for 23SU are in good agreement with published radiometric values, whereas our results for 233U are the first experimental measurements in this mass range. The cumulative fission yields determined by mass spectrometry for ruthenium, palladium, cadmium, tin and tellurium show a smooth mass distribution in the symmetric region for both 233U and 235U, except for a significant depression in the yield curve in the range 111-14.

Isotope Dilution Gas Chromatographic–Mass Spectrometric Method for the Determination of Isoflavonoids, Coumestrol, and Lignans in Food Samples

1996 ◽  
Vol 233 (2) ◽  
pp. 169-180 ◽  
Author(s):  
Witold Mazur ◽  
Theodore Fotsis ◽  
Kristina Wähälä ◽  
Sirpa Ojala ◽  
Auli Salakka ◽  
...  
Keyword(s):  
Isotope Dilution ◽  
Food Samples ◽  
Mass Spectrometric ◽  
Spectrometric Method ◽  
Mass Spectrometric Method ◽  
Chromatographic Mass

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

1978 ◽  
Vol 56 (10) ◽  
pp. 1340-1352 ◽  
Author(s):  
Masako Shima ◽  
H. G. Thode ◽  
R. H. Tomlinson
Keyword(s):  
Thermal Neutron ◽  
Isotope Dilution ◽  
Yield Curve ◽  
Mass Region ◽  
Mass Yield ◽  
Neutron Fission ◽  
Significant Depression ◽  
Thermal Neutron Fission ◽  
Induced Fission ◽  
Fission Yields

The relative cumulative yields of nine stable and long-lived isotopes of ruthenium and palladium (masses 101 to 110) produced in the thermal neutron fission of 233U and in the thermal and epicadmium neutron fission of 235U and 239Pu have been measured using a solid source mass spectrometer and isotope dilution techniques. Absolute yields of these isotopes for the thermal neutron fission of 233U, 235U, and 239Pu are obtained using normalization procedures. These yields provide the first experimentally determined yields of the palladium masses 105, 106, 107, 108, and 110.In the thermal fission of 233U and 235U the ruthenium isotope yields obtained are in general agreement with previously determined values, although discrepancies exist of the order of 10% at masses 103, 104, and 106 for thermal fission of 235U.A plot of the ruthenium and palladium isotope mass yields together with the previously determined yields for the cadmium and tin isotopes indicate a significant depression in the mass yield curve at masses 111 and 114 for 233U and 235U thermal fission, respectively. In the 235U epicadmium fission, yields at even mass numbers are relatively higher than those at odd numbers, resulting in a zigzag yield curve in the 101 to 110 mass region.

Sign in / Sign up

Export Citation Format

Share Document