A calorimetric determination of the oxidation yield of the Fricke dosimeter at high dose rates of electrons

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j100807a507· OSTI ID:4818794

Anderson, A. R.

A calorimetric determination was made of G(Fe³⁺) for the Fricke dosimeter (0.001 M FeSO₄, 0.001 M NaCl, 0.8 N H₂SO₄, aerated), in order to provide dosimetry for the irradiation conditions applicable to certain chemical studies. G(Fe³⁺) was determined as 15.2 plus or minus 0.4 at an instantaneous dose rate of 5.7 x 10²¹ ev ml^-1 sec^-1. The ferric yields determined at different instantaneous dose rates show that at dose rates > 3 x 10²² ev ml^-1 G(Fe³⁺) decreases rapidly with increasing dose rate while below 10²² ev ml^-1 sec^-1 G(Fe³⁺) is almost constant and approaches the accepted value for gamma and electron irradiations at much lower dose rates. The calorimetric data indicate that the oxidation yield of the Fricke dosimeter can be represented adequately as 11.4 plus or minus 0.5 ions per 100 ev. The calorimetry measurements and ferric yields are tabulated.

• Research Organization: Argonne National Lab., Ill.
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-007595
• OSTI ID: 4818794
• Journal Information: Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 1 Vol. 66; ISSN 0022-3654
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CALORIMETERS
DOSEMETERS
ELECTRON BEAMS
GAMMA RADIATION
IRON SULFATES
OXIDATION
QUANTITATIVE ANALYSIS
RADIATION DOSES
SODIUM CHLORIDES
SULFURIC ACID
TABLES
THERMODYNAMICS