You need JavaScript to view this

Synthesis and characterization of alanine boron hydrate for its use in thermal neutron dosimetry.; Sintesis y caracterizacion del borohidrato de alanina para su uso en dosimetria de neutrones termicos.

Thesis/Dissertation:

Abstract

Alanine boron hydrate was synthesized for its possible use as intercomparison dosimeter for thermal neutron irradiation. The irradiations were performed in the Nuclear Reactor of the Nuclear Center of Mexico. The salt was prepared by reacting alanine and boric acid in a (1:1) stoichiometric ratio in neutral pH 7.5 aqueous solution and also in a basic pH 13 solution. The latter reaction was prepared with the addition of ammonia hydroxide (25%). Solutions were stirred and afterwards were let to evaporate. The obtained product in each reaction is a white solid. Dosimeters were prepared with the obtained reaction products and irradiated under thermal neutron flux of 5 x 10{sup 7} n/cm{sup 2} s. For 30 hours. The analysis of irradiated samples was made in a Variant E-15 Electron Paramagnetic Resonance spectrometer. The observed response of the samples prepared with the reaction product at the basic pH is approximately 50% higher than the neutral pH samples. In order to investigate the optimum signal enhancement samples were prepared in a basic pH medium in the following stoichiometric ratios: (1:0.5); (1:0.75); (1:1.25); (1:1.5) and (1:1.75). It was observed that the samples of the reaction (1:0.75) produced the higher response. The response was 2728% higher  More>>
Authors:
Publication Date:
Jul 01, 1994
Product Type:
Thesis/Dissertation
Report Number:
INIS-mf-13926
Reference Number:
SCA: 440102; 400101; PA: AIX-25:047785; EDB-94:103395; ERA-19:025580; NTS-95:001411; SN: 94001051738
Resource Relation:
Other Information: TH: Thesis (Chemist).; PBD: 1994
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ALANINE-L; THERMAL NEUTRONS; CHEMICAL DOSEMETERS; NEUTRON DOSIMETRY; BORIC ACID; CALIBRATION; NUCLEAR MAGNETIC RESONANCE; REFRACTIVE INDEX; TRIGA-3-SALAZAR REACTOR; X-RAY DIFFRACTION; 440102; 400101; RADIATION DOSEMETERS; ACTIVATION, NUCLEAR REACTION, RADIOMETRIC, AND RADIOCHEMICAL PROCEDURES
OSTI ID:
10167261
Research Organizations:
Universidad Autonoma del Estado de Mexico, Toluca (Mexico). Facultad de Quimica
Country of Origin:
Mexico
Language:
Spanish
Other Identifying Numbers:
Other: ON: DE94629636; TRN: MX9400016047785
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
INIS
Size:
81 p.
Announcement Date:

Thesis/Dissertation:

Citation Formats

Yanez S, J C. Synthesis and characterization of alanine boron hydrate for its use in thermal neutron dosimetry.; Sintesis y caracterizacion del borohidrato de alanina para su uso en dosimetria de neutrones termicos.. Mexico: N. p., 1994. Web.
Yanez S, J C. Synthesis and characterization of alanine boron hydrate for its use in thermal neutron dosimetry.; Sintesis y caracterizacion del borohidrato de alanina para su uso en dosimetria de neutrones termicos.. Mexico.
Yanez S, J C. 1994. "Synthesis and characterization of alanine boron hydrate for its use in thermal neutron dosimetry.; Sintesis y caracterizacion del borohidrato de alanina para su uso en dosimetria de neutrones termicos." Mexico.
@misc{etde_10167261,
title = {Synthesis and characterization of alanine boron hydrate for its use in thermal neutron dosimetry.; Sintesis y caracterizacion del borohidrato de alanina para su uso en dosimetria de neutrones termicos.}
author = {Yanez S, J C}
abstractNote = {Alanine boron hydrate was synthesized for its possible use as intercomparison dosimeter for thermal neutron irradiation. The irradiations were performed in the Nuclear Reactor of the Nuclear Center of Mexico. The salt was prepared by reacting alanine and boric acid in a (1:1) stoichiometric ratio in neutral pH 7.5 aqueous solution and also in a basic pH 13 solution. The latter reaction was prepared with the addition of ammonia hydroxide (25%). Solutions were stirred and afterwards were let to evaporate. The obtained product in each reaction is a white solid. Dosimeters were prepared with the obtained reaction products and irradiated under thermal neutron flux of 5 x 10{sup 7} n/cm{sup 2} s. For 30 hours. The analysis of irradiated samples was made in a Variant E-15 Electron Paramagnetic Resonance spectrometer. The observed response of the samples prepared with the reaction product at the basic pH is approximately 50% higher than the neutral pH samples. In order to investigate the optimum signal enhancement samples were prepared in a basic pH medium in the following stoichiometric ratios: (1:0.5); (1:0.75); (1:1.25); (1:1.5) and (1:1.75). It was observed that the samples of the reaction (1:0.75) produced the higher response. The response was 2728% higher than the alanine only dosimeters. The reaction product was chemically characterized by X-ray diffraction, Nuclear Magnetic Resonance, Chromatography, Refractometry and Solubility tests. Results indicate that alanine boron hydrate is formed in basic media and in a stoichiometric ratio (1:0.75). The dosimetric characterization of alanine boron hydrate was performed, results are reported. It is concluded that alanine boron hydrate may be a good intercomparison dosimeter for thermal neutron irradiation. (Author).}
place = {Mexico}
year = {1994}
month = {Jul}
}