CROSS-SECTIONS FOR THE REACTIONS Ra$sup 226$(n,2n)Ra$sup 225$ AND Ra$sup 226$(n,3n)Ra$sup 224$ WITH 14.5 Mev NEUTRONS
Journal Article
·
· J. Inorg. & Nuclear Chem.
About 5 mg of Ra/sup 226/ were irradiated with 14.5 Mev neutrons. The products of the Ra/sup 226/(n,2n)Ra/sup 225/ and Ra/sup 226/(n,3n) Ra/sup 224/ reactions were determined by isolating Pb/sup 209/ and Bi/sup 212/ from their respective decay chains. Pb/sup 209/ was isolated by separating Bi/sup 213/ from the radium by means of an electrochemical deposition and then allowing Pb/sup 209/ to grow in from its decay chain. Pb/sup 209/ was then separated and its beta - particle activity was counted in a 4 pi proportional counter. Bi/sup 212/ was obtained by an electrochemical deposition following an electrolytic deposition of Pb/sup 212/. The alpha -particle activity of Bi/sup 212/ was counted in a gridded ionization chamber. The values found for the cross-sections are as follows- Ra/sup 226/ sigma (n,2n) = 1.60 plus or minus 0.20 barn; Ra/sup 226/ sigma (n,3n) = 0.53 plus or minus 0.07 barn. (auth)
- Research Organization:
- Atomic Weapons Research Establishment, Aldermaston, Berks, Eng.
- NSA Number:
- NSA-14-016262
- OSTI ID:
- 4154131
- Journal Information:
- J. Inorg. & Nuclear Chem., Journal Name: J. Inorg. & Nuclear Chem. Vol. Vol: 13
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Tue Dec 31 23:00:00 EST 1974
· Annu. Book ASTM Stand.; (United States)
·
OSTI ID:7343196
APPLICATION OF RECOIL TECHNIQUES TO STUDY OF THE REACTIONS Ra$sup 226$($alpha$,4n)Th$sup 226$, Pb$sup 208$($alpha$,2n)Po$sup 210$, AND Pb$sup 207$($alpha$,n)Po$sup 21$$sup 0$
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Related Subjects
ALPHA DECAY
ALPHA DETECTION
BETA DETECTION
BISMUTH 212
BISMUTH 213
CROSS SECTIONS
DECAY
ELECTROCHEMISTRY
ELECTROLYSIS
ENERGY RANGE
FAST NEUTRONS
IONIZATION CHAMBERS
LEAD 209
LEAD 212
MEASURED VALUES
MEV RANGE
NEUTRON BEAMS
NEUTRONS
NUCLEAR REACTIONS
PHYSICS
RADIOACTIVITY
RADIUM 224
RADIUM 225
RADIUM 226
SEPARATION PROCESSES
TARGETS
ALPHA DETECTION
BETA DETECTION
BISMUTH 212
BISMUTH 213
CROSS SECTIONS
DECAY
ELECTROCHEMISTRY
ELECTROLYSIS
ENERGY RANGE
FAST NEUTRONS
IONIZATION CHAMBERS
LEAD 209
LEAD 212
MEASURED VALUES
MEV RANGE
NEUTRON BEAMS
NEUTRONS
NUCLEAR REACTIONS
PHYSICS
RADIOACTIVITY
RADIUM 224
RADIUM 225
RADIUM 226
SEPARATION PROCESSES
TARGETS