scholarly journals Criticality study of various highly enriched uranium samples measured in an active well coincidence counter

1994 ◽  
Author(s):  
M Miller ◽  
D Yearwood
Keyword(s):  
Coincidence Counter ◽  
Enriched Uranium

Calibration of the HB-line active well neutron coincidence counter for measure of LANL 3013 highly enriched uranium product splits

2009 ◽  
Vol 279 (2) ◽  
pp. 539-546
Author(s):  
R. A. Dewberry ◽  
D. R. Williams ◽  
R. S. Lee ◽  
D. W. Roberts ◽  
L. M. Arrigo ◽  
...  
Keyword(s):  
Coincidence Counter ◽  
Enriched Uranium

Exploring a New Option for Improving Detection of Highly Enriched Uranium

2018 ◽  
Author(s):  
S A Kreek
Keyword(s):  
Enriched Uranium

scholarly journals Separation of Lanthanide Isotopes from Mixed Fission Product Samples

Separations ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 104
Author(s):  
Leah M. Arrigo ◽  
Jun Jiang ◽  
Zachary S. Finch ◽  
James M. Bowen ◽  
Staci M. Herman ◽  
...  
Keyword(s):  
Fission Product ◽  
Fission Products ◽  
Nuclear Data ◽  
Product Analysis ◽  
Data Production ◽  
Thermal Irradiation ◽  
Nuclear Events ◽  
Lanthanide Separation ◽  
Enriched Uranium ◽  
Fission Yields

The measurement of radioactive fission products from nuclear events has important implications for nuclear data production, environmental monitoring, and nuclear forensics. In a previous paper, the authors reported the optimization of an intra-group lanthanide separation using LN extraction resin from Eichrom Technologies®, Inc. and a nitric acid gradient. In this work, the method was demonstrated for the separation and quantification of multiple short-lived fission product lanthanide isotopes from a fission product sample produced from the thermal irradiation of highly enriched uranium. The separations were performed in parallel in quadruplicate with reproducible results and high decontamination factors for 153Sm, 156Eu, and 161Tb. Based on the results obtained here, the fission yields for 144Ce, 153Sm, 156Eu, and 161Tb are consistent with published fission yields. This work demonstrates the effectiveness of the separations for the intended application of short-lived lanthanide fission product analysis requiring high decontamination factors.

scholarly journals Coincidence counter measurements of cosmic rays in an aeroplane

1936 ◽  
Vol 156 (889) ◽  
pp. 570-577 ◽  
Keyword(s):  
Cosmic Rays ◽  
High Altitude ◽  
Cosmic Ray ◽  
Independent Sets ◽  
Vertical Line ◽  
Coincidence Counting ◽  
Detailed Design ◽  
Recording Apparatus ◽  
Coincidence Counter ◽  
Balloon Experiments

Cosmic ray measurements on mountains are limited in general to altitudes below about 4000 meters. Above this height Regener has made successful use of small balloons carrying self-recording apparatus, and occasional flights have been made with manned balloons by Piccard, Cosyns, and by American workers. Balloon experiments are, however, hardly practicable in this country, so we decided to investigate cosmic rays, and in particular the production of showers, using an aeroplane. Facilities for flying to a height of about 10 km. Were generously provided by the Air Ministry. Apparatus Two independent sets of three tube counters were used in conjunction with the usual coincidence counting circuits. The counters could be arranged in a vertical line to record vertical penetrating particles, or in a triangle to record showers. The triple coincidences were recorded by telephone counters which were photographed at intervals together with a clock and aneroid barometer. The detailed design of the apparatus required some consideration since the aeroplane available (the Vickers Vespa machine used for high altitude experiments at the Royal Aircraft Establishment) had an open observer’s cockpit in which the counting set had to be installed.

Characterisation of Enriched Uranium Dioxide Particles from a Uranium Handling Facility

1998 ◽  
Vol 79 (1) ◽  
pp. 57-62 ◽  
Author(s):  
M.D. Hoover ◽  
G.J. Newton ◽  
R.A. Guilmette ◽  
R.J. Howard ◽  
R.N. Ortiz ◽  
...  
Keyword(s):  
Uranium Dioxide ◽  
Enriched Uranium

Measurements of Thermal Utilization, Resonance Escape Probability, and Fast Effect in Water-Moderated, Slightly Enriched Uranium and Uranium Oxide Lattices

1958 ◽  
Vol 3 (4) ◽  
pp. 403-427 ◽  
Author(s):  
D. Klein ◽  
A. Z. Kranz ◽  
G. G. Smith ◽  
W. Baer ◽  
J. DeJuren
Keyword(s):  
Uranium Oxide ◽  
Escape Probability ◽  
Enriched Uranium
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