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Title: ISOTOPE SEPARATION IN THE FREEZING OF WATER AND DIFFUSION CONSTANT OF D AND O*SUP 18/ IN ICE WITH DISCUSSION OF THE POSSIBILITY OF A MULTIPLICATION OF THE ISOTOPE SEPARATION APPEARING DURING FREEZING IN A HAIRPIN COUNTER CURRENT DEVICE (in German)

Abstract

In the stepwise crystallization of water an enrichment of both HDO contained in water and of H/sub 2/O/sup 18/ in the crystalline phase occurs. It was shown that the enrichment in the crystalline phase was detected by a separation parameter which could be calculated from the melting point dlfference of HDO and H/sub 2/O or H/sub 2/O/sup 16/ and H/sub 2/O/sup 18/ as well as from the heat of fusion and the absolute fusion temperature. For the case of deuterium or O/sup 18/ enrichment the separation parameter was experimentally determined. An HDO enrichment of sigma /sub E,W/ w= 1.71 x 10/sup -2/ was obtained in good agreement wtth theoretical values. For the enriehment of H/sub 2/O/sup 18/ a value of sigma /sub E,W/x 10/sup -4/ was obtained. The calculated fusion temperature of H/sub 2/O/sup 18/ was + 0.05 deg . It is possible to multiply the small separation effect observed in the stepwise crystallization of water in a hairpin counter curreat system. For the conditions under which a practical multiplication could be obtained, the magnitude of the diffusion coefficient for D or O/sup 18/ in ice is essential. These diffusion coefficients were experimentally determined from -1.5 to -2 deg .more » They are, within the error limits, identical for D and O/sup 18/ and have the value D =1.0 x 10/sup -10/ cm/ sec. Onthe basis of the measured separation parameter and the diffusion coefficients, the possibility for a multiplication of the isotope separation by a hairpin counter current method was discusssd. (tr-anth)« less

Authors:
;
Publication Date:
Research Org.:
Univ. of Basel
Sponsoring Org.:
USDOE
OSTI Identifier:
4327370
NSA Number:
NSA-12-013007
Resource Type:
Journal Article
Journal Name:
Helvetica Chimica Acta (Switzerland)
Additional Journal Information:
Journal Volume: Vol: 41; Other Information: Orig. Receipt Date: 31-DEC-58
Country of Publication:
Country unknown/Code not available
Language:
German
Subject:
CHEMISTRY; CONFIGURATION; COUNTER CURRENT; CRYSTALLIZATION; DEUTERIUM; DEUTERIUM COMPOUNDS; DIFFUSION; EFFICIENCY; ENRICHMENT; ERRORS; FUSION HEAT; HEATING; ICE; ISOTOPE SEPARATION; MEASURED VALUES; MECHANICAL STRUCTURES; MELTING; MELTING POINTS; NUMERICALS; OXYGEN 16; OXYGEN 18; QUANTITATIVE ANALYSIS; SOLIDIFICATION; TESTING; WATER

Citation Formats

Kuhn, W, and Thurkauf, M. ISOTOPE SEPARATION IN THE FREEZING OF WATER AND DIFFUSION CONSTANT OF D AND O*SUP 18/ IN ICE WITH DISCUSSION OF THE POSSIBILITY OF A MULTIPLICATION OF THE ISOTOPE SEPARATION APPEARING DURING FREEZING IN A HAIRPIN COUNTER CURRENT DEVICE. Country unknown/Code not available: N. p., 1958. Web. doi:10.1002/hlca.19580410408.
Kuhn, W, & Thurkauf, M. ISOTOPE SEPARATION IN THE FREEZING OF WATER AND DIFFUSION CONSTANT OF D AND O*SUP 18/ IN ICE WITH DISCUSSION OF THE POSSIBILITY OF A MULTIPLICATION OF THE ISOTOPE SEPARATION APPEARING DURING FREEZING IN A HAIRPIN COUNTER CURRENT DEVICE. Country unknown/Code not available. doi:10.1002/hlca.19580410408.
Kuhn, W, and Thurkauf, M. Wed . "ISOTOPE SEPARATION IN THE FREEZING OF WATER AND DIFFUSION CONSTANT OF D AND O*SUP 18/ IN ICE WITH DISCUSSION OF THE POSSIBILITY OF A MULTIPLICATION OF THE ISOTOPE SEPARATION APPEARING DURING FREEZING IN A HAIRPIN COUNTER CURRENT DEVICE". Country unknown/Code not available. doi:10.1002/hlca.19580410408.
@article{osti_4327370,
title = {ISOTOPE SEPARATION IN THE FREEZING OF WATER AND DIFFUSION CONSTANT OF D AND O*SUP 18/ IN ICE WITH DISCUSSION OF THE POSSIBILITY OF A MULTIPLICATION OF THE ISOTOPE SEPARATION APPEARING DURING FREEZING IN A HAIRPIN COUNTER CURRENT DEVICE},
author = {Kuhn, W and Thurkauf, M},
abstractNote = {In the stepwise crystallization of water an enrichment of both HDO contained in water and of H/sub 2/O/sup 18/ in the crystalline phase occurs. It was shown that the enrichment in the crystalline phase was detected by a separation parameter which could be calculated from the melting point dlfference of HDO and H/sub 2/O or H/sub 2/O/sup 16/ and H/sub 2/O/sup 18/ as well as from the heat of fusion and the absolute fusion temperature. For the case of deuterium or O/sup 18/ enrichment the separation parameter was experimentally determined. An HDO enrichment of sigma /sub E,W/ w= 1.71 x 10/sup -2/ was obtained in good agreement wtth theoretical values. For the enriehment of H/sub 2/O/sup 18/ a value of sigma /sub E,W/x 10/sup -4/ was obtained. The calculated fusion temperature of H/sub 2/O/sup 18/ was + 0.05 deg . It is possible to multiply the small separation effect observed in the stepwise crystallization of water in a hairpin counter curreat system. For the conditions under which a practical multiplication could be obtained, the magnitude of the diffusion coefficient for D or O/sup 18/ in ice is essential. These diffusion coefficients were experimentally determined from -1.5 to -2 deg . They are, within the error limits, identical for D and O/sup 18/ and have the value D =1.0 x 10/sup -10/ cm/ sec. Onthe basis of the measured separation parameter and the diffusion coefficients, the possibility for a multiplication of the isotope separation by a hairpin counter current method was discusssd. (tr-anth)},
doi = {10.1002/hlca.19580410408},
journal = {Helvetica Chimica Acta (Switzerland)},
number = ,
volume = Vol: 41,
place = {Country unknown/Code not available},
year = {1958},
month = {1}
}