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Title: Chemical consequences of radioactive decay. 2. Spectrophotometric study of the ingrowth of berkelium-249 and californium-249 into halides of einsteinium-253

Abstract

The ingrowth of /sup 249/Bk daughter and /sup 249/Cf granddaughter into fluorides, chlorides, bromides, and iodides of parent /sup 253/Es was followed by spectrophotometric methods. In the case of trivalent Es halides, the oxidation state of the parent is maintained by its progeny. In the case of divalent Es halides, the oxidation state of the parent is retained by the granddaughter species. No other oxidation states or chemical species of the progeny ions are observed even though experimental conditions of storage such as physical state, temperature, or cover-gas composition were varied. These results are considered in terms of mechanisms that would allow such chemical stability.

Authors:
 [1]; ; ; ;
  1. (Oak Ridge National Lab., TN)
Publication Date:
OSTI Identifier:
6005963
DOE Contract Number:
W-7405-ENG-26; AS05-76ER04447
Resource Type:
Journal Article
Resource Relation:
Journal Name: Inorg. Chem.; (United States); Journal Volume: 20:11
Country of Publication:
United States
Language:
English
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY; BERKELIUM 249; ABSORPTION SPECTROSCOPY; BETA DECAY; CALIFORNIUM 249; ALPHA DECAY; EINSTEINIUM 253; EINSTEINIUM BROMIDES; CHEMICAL PREPARATION; EINSTEINIUM CHLORIDES; EINSTEINIUM FLUORIDES; EINSTEINIUM IODIDES; DAUGHTER PRODUCTS; OXIDATION; ACTINIDE COMPOUNDS; ACTINIDE ISOTOPES; ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; BERKELIUM ISOTOPES; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; BROMIDES; BROMINE COMPOUNDS; CALIFORNIUM ISOTOPES; CHEMICAL REACTIONS; CHLORIDES; CHLORINE COMPOUNDS; DAYS LIVING RADIOISOTOPES; DECAY; EINSTEINIUM COMPOUNDS; EINSTEINIUM ISOTOPES; EVEN-ODD NUCLEI; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; HEAVY NUCLEI; IODIDES; IODINE COMPOUNDS; ISOTOPES; NUCLEI; ODD-EVEN NUCLEI; RADIOISOTOPES; SPECTROSCOPY; SYNTHESIS; TRANSPLUTONIUM COMPOUNDS; TRANSURANIUM COMPOUNDS; YEARS LIVING RADIOISOTOPES; 400702* - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials

Citation Formats

Young, J.P., Haire, R.G., Peterson, J.R., Ensor, D.D., and Fellows, R.L.. Chemical consequences of radioactive decay. 2. Spectrophotometric study of the ingrowth of berkelium-249 and californium-249 into halides of einsteinium-253. United States: N. p., 1981. Web. doi:10.1021/ic50225a076.
Young, J.P., Haire, R.G., Peterson, J.R., Ensor, D.D., & Fellows, R.L.. Chemical consequences of radioactive decay. 2. Spectrophotometric study of the ingrowth of berkelium-249 and californium-249 into halides of einsteinium-253. United States. doi:10.1021/ic50225a076.
Young, J.P., Haire, R.G., Peterson, J.R., Ensor, D.D., and Fellows, R.L.. 1981. "Chemical consequences of radioactive decay. 2. Spectrophotometric study of the ingrowth of berkelium-249 and californium-249 into halides of einsteinium-253". United States. doi:10.1021/ic50225a076.
@article{osti_6005963,
title = {Chemical consequences of radioactive decay. 2. Spectrophotometric study of the ingrowth of berkelium-249 and californium-249 into halides of einsteinium-253},
author = {Young, J.P. and Haire, R.G. and Peterson, J.R. and Ensor, D.D. and Fellows, R.L.},
abstractNote = {The ingrowth of /sup 249/Bk daughter and /sup 249/Cf granddaughter into fluorides, chlorides, bromides, and iodides of parent /sup 253/Es was followed by spectrophotometric methods. In the case of trivalent Es halides, the oxidation state of the parent is maintained by its progeny. In the case of divalent Es halides, the oxidation state of the parent is retained by the granddaughter species. No other oxidation states or chemical species of the progeny ions are observed even though experimental conditions of storage such as physical state, temperature, or cover-gas composition were varied. These results are considered in terms of mechanisms that would allow such chemical stability.},
doi = {10.1021/ic50225a076},
journal = {Inorg. Chem.; (United States)},
number = ,
volume = 20:11,
place = {United States},
year = 1981,
month =
}
  • Spectrophotometric and x-ray powder diffraction methods have been applied to a study of the ingrowth of californium-249 by ..beta../sup -/ decay of berkelium-249 in crystalline /sup 249/BkBr/sub 3/. It was found that the Cf daughter grows in with the same oxidation state and crystal structure as the parent. Thus, six-coordinate BkBr/sub 3/ (AlCl/sub 3/-type monoclinic structure) generates six-coordinate CfBr/sub 3/, and eight-coordinate BkBr/sub 3/ (PuBr/sub 3/-type orthorhombic structure) generates eight-coordinate CfBr/sub 3/, a previously unknown form of CfBr/sub 3/. It was also found that the daughter Cf(III) in the BkBr/sub 3/ parent compound can be reduced to Cf(II) by treatmentmore » with H/sub 2/, as it can in pure CfBr/sub 3/. 5 figures.« less
  • Absorption spectrophotometric and X-ray powder diffraction methods have been applied to a study of the trichlorides of /sup 249/Bk and /sup 248/Cf and their relationship through the ..beta.. decay of /sup 249/Bk. BkCl/sub 3/ has been prepared for the first time in the PuBr/sub 3/-type orthorhombic modification by quenching from the melt. Each of the crystal forms (UCl/sub 3/-type hexagonal and PuBr/sub 3/-type orthorhombic) of BkCl/sub 3/ and CfCl/sub 3/ has been characterized on the basis of its solid-state absorption spectrum. The orthorhombic forms of BkCl/sub 3/ and CfCl/sub 3/ are the high-temperature modifications with respect to the hexagonal phases,more » with the apparent transition temperatures near the melting points of BkCl/sub 3/ (876 K) and CfClnumber (818 K). Orthorhombic BkCl/sub 3/ transmutes to orthorhombic CfCl/sub 3/ and hexagonal BkCl/sub 3/ transmutes to hexagonal CfCl/sub 3/. Thus, it was found that both the oxidation state and the crystal structure of the parent /sup 249/Bk compound were retained by the daughter /sup 249/Cf compound through ..beta.. decay in the bulk phase solid state. 11 references, 5 figures.« less
  • Samples of intermetallic compounds Pt/sub 5//sup 249/Cf and Pt/sub 5//sup 249/Bk were obtained in the form of thin layers on a platinum support. It was found that the Pt/sub 5/Bk and Pt/sub 5/Cf intermetallides have a hexagonal structure of the Cu/sub 5/Ca type with parameters: a = 0.5270 +/- 0.0005, c = 0.4423 +/- 0.0004 for Pt/sub 5/Bk and a = 0.5266 +/- 0.0008, c = 0.4420 +/- 0.0005 nm for Pt/sub 5/Cf. The x-ray amorphization of the crystal lattice of the Pt/sub 5/Cf intermetallide was discovered after approx. 70 days of holding at room temperature, and its restoration aftermore » short-term annealing at 500/sup 0/C in vacuo. It was found that lattice parameters and volume of the unit cell of Pt/sub 5/Bk intermetallide increases after approx. 140 days of holding. This is due to the accumulation of /sup 249/Cf as the result of ..beta..-decay of /sup 249/Bk and the corresponding increase in the ..cap alpha..-activity of the sample.« less
  • The yields of /sup 125/I-labeled organic products, formed in the decay of /sup 125/Xe in heptane at 20/sup 0/C were determined by a radiogas-chromatographic method. Using a radical acceptor /sup 131/I/sub 2/, the number of iodine atoms stabilized in the organic form as a result of the decay of /sup 125/Xe in heptane was measured. This number is (3.44 +- 0.82) . 10/sup 3/ atoms per event of disintegration of /sup 125/Xe.