13567 K
21 pp.
 
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TitleChemical Research--Radiochemistry Report for Month Ending April 17, 1943
Author(s)Franck, J. Division Director
Publication Date1952
Report NumberCC-579
Unique IdentifierACC0484
Other NumbersAECD-3284; OSTI ID 4411737
Research OrgMetallurgical Laboratory, University of Chicago
Other InformationC. D. Coryell, Section Chief; A. H. Compton, Project Director; Declassified January 18, 1956
SubjectPhysics; Beta Particles; Diffusion Length; Distribution; Energy Range; Feather Analysis; Fermions
KeywordsFission Products; Rare Earth; Rhodium Isotopes; Technetium
Related Web PagesJames Franck and the 'Franck Report'
Abstract1. A continuation of the detailed analysis of beta and soft and hard gamma activity associated with all fission product elements in a nitrate bombardment is presented. The �cooling� time has been extended to 170 days. The data for the individual elements are presented in tables as counts/min and in figures as percentage of total beta, soft gamma, and hard gamma radiations. 2. Calculations and graphs have been made on the heat generated by the longer-lived fission products. The method of analysis is presented. 3. Two new short-lived Rh fission product activities have been found. They are probably the daughters of the two long-lived Ru activities (30d, 200d). Re-evaluation of data on 43 leads to the conclusion that the longest lived 43 activity in measureable yields is the 6.1h (formerly 6.6h). New parent-daughter relationships in the rare-earth activities are given. 4. Theoretical beta absorption curves have been made using the Fermi distribution function and linear absorption curves for small energy intervals. A Feather analysis of the absorption curve leads to the theoretical maximum energy.
13567 K
21 pp.
 
View Document 
  


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