Abstract
A method of determining subpicogram quantities of plutonium in soil, mud, water, plant and animal tissues is proposed. Plutonium is chemically isolated from the samples, while the {alpha}-active {sup 236} Pu is issued to control yield. The plutonium fraction deposited on some backing as well as an uranium containing standard are put in contact with solid state track detectors (SSTD) - foils of polyethyleneterephtalate, and irradiated by thermal neutrons of approximately 10{sup 15} cm{sup -2} fluence. After an appropriate chemical etching, the content of {sup 239} Pu in the samples is determined by scanning fission fragment tracks in the SSTD. To control possible uranium impurities in the plutonium fraction, the latter and the standard (in contact with a fresh SSTD) are bombarded by a high fluence of {gamma}-quanta with energies {<=} 25 MeV (microtron Bremsstrahlung). We have succeeded in determining the lower limit of {sup 235} U impurities at a level of < 10{sup -13} g, due to similar photofission cross section of all Pu isotopes. The proposed method provides the determination of {sup 239} Pu content in routine analysis with a sensitivity at a level of 10{sup -13} g/g. More than one hundred assays for {sup 239} Pu content
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Chuburkov, Yu T;
Perelygin, V P;
Zvara, I
[1]
- Joint Inst. for Nuclear Research, Dubna (Russian Federation). Lab. of Nuclear Reactions; and others
Citation Formats
Chuburkov, Yu T, Perelygin, V P, and Zvara, I.
A Novel Approach to the Problem of Highly-Sensitive Regular Analysis for Man-Made Plutonium in Environment and Human Body.
JINR: N. p.,
1994.
Web.
Chuburkov, Yu T, Perelygin, V P, & Zvara, I.
A Novel Approach to the Problem of Highly-Sensitive Regular Analysis for Man-Made Plutonium in Environment and Human Body.
JINR.
Chuburkov, Yu T, Perelygin, V P, and Zvara, I.
1994.
"A Novel Approach to the Problem of Highly-Sensitive Regular Analysis for Man-Made Plutonium in Environment and Human Body."
JINR.
@misc{etde_10125151,
title = {A Novel Approach to the Problem of Highly-Sensitive Regular Analysis for Man-Made Plutonium in Environment and Human Body}
author = {Chuburkov, Yu T, Perelygin, V P, and Zvara, I}
abstractNote = {A method of determining subpicogram quantities of plutonium in soil, mud, water, plant and animal tissues is proposed. Plutonium is chemically isolated from the samples, while the {alpha}-active {sup 236} Pu is issued to control yield. The plutonium fraction deposited on some backing as well as an uranium containing standard are put in contact with solid state track detectors (SSTD) - foils of polyethyleneterephtalate, and irradiated by thermal neutrons of approximately 10{sup 15} cm{sup -2} fluence. After an appropriate chemical etching, the content of {sup 239} Pu in the samples is determined by scanning fission fragment tracks in the SSTD. To control possible uranium impurities in the plutonium fraction, the latter and the standard (in contact with a fresh SSTD) are bombarded by a high fluence of {gamma}-quanta with energies {<=} 25 MeV (microtron Bremsstrahlung). We have succeeded in determining the lower limit of {sup 235} U impurities at a level of < 10{sup -13} g, due to similar photofission cross section of all Pu isotopes. The proposed method provides the determination of {sup 239} Pu content in routine analysis with a sensitivity at a level of 10{sup -13} g/g. More than one hundred assays for {sup 239} Pu content in specimens of above indicated media from Ukraine, Belorussia, Ural region and Germany have been performed. In future, one will hopefully reach a sensitivity of 10{sup -14} - 10{sup -15} g/g. 14 refs., 2 figs., 82 tabs.}
place = {JINR}
year = {1994}
month = {Dec}
}
title = {A Novel Approach to the Problem of Highly-Sensitive Regular Analysis for Man-Made Plutonium in Environment and Human Body}
author = {Chuburkov, Yu T, Perelygin, V P, and Zvara, I}
abstractNote = {A method of determining subpicogram quantities of plutonium in soil, mud, water, plant and animal tissues is proposed. Plutonium is chemically isolated from the samples, while the {alpha}-active {sup 236} Pu is issued to control yield. The plutonium fraction deposited on some backing as well as an uranium containing standard are put in contact with solid state track detectors (SSTD) - foils of polyethyleneterephtalate, and irradiated by thermal neutrons of approximately 10{sup 15} cm{sup -2} fluence. After an appropriate chemical etching, the content of {sup 239} Pu in the samples is determined by scanning fission fragment tracks in the SSTD. To control possible uranium impurities in the plutonium fraction, the latter and the standard (in contact with a fresh SSTD) are bombarded by a high fluence of {gamma}-quanta with energies {<=} 25 MeV (microtron Bremsstrahlung). We have succeeded in determining the lower limit of {sup 235} U impurities at a level of < 10{sup -13} g, due to similar photofission cross section of all Pu isotopes. The proposed method provides the determination of {sup 239} Pu content in routine analysis with a sensitivity at a level of 10{sup -13} g/g. More than one hundred assays for {sup 239} Pu content in specimens of above indicated media from Ukraine, Belorussia, Ural region and Germany have been performed. In future, one will hopefully reach a sensitivity of 10{sup -14} - 10{sup -15} g/g. 14 refs., 2 figs., 82 tabs.}
place = {JINR}
year = {1994}
month = {Dec}
}