EFFECT OF SOLVENT AND SOLUTE STRUCTURE ON SCINTILLATOR PULSE HEIGHTS. II. CORRELATION OF PULSE HEIGHTS FOR AROMATIC LIQUID ORGANIC SCINTILLATORS WITH HAMMETT SUBSTITUTENT CONSTANTS

Journal Article · Wed Feb 01 04:00:00 EST 1961 · Journal of Chemical Physics (U.S.)

DOI:https://doi.org/10.1063/1.1700970· OSTI ID:4104924

Sandler, S R; Loshaek, S

It has been found that numerous data in the literature on aromatic organic liquid scintillators could be interpreted in terms of the resonance and polarity of the constituent solvents and fluors. The resonance and polarity of the ring substituted aromatic compounds were characterized quantitatively by Hammett substituent constants ( in rabbits; tr ). For a number of liquid scintillator systems in which the fluor composition was kept constant and the structure of the aromatic solvent was varied, pulse heights increased approximately linearly with increasing electron donating (negative in rabbits; tr values) power of the substituents on the aromatic molecule. This correlation held for nine different fluors in each of seven different aromatic solvents. A similar correlation was found for a series of fluors consisting of substituted 2,5-diphenyl-1,3,4-oxadiazoles and 2,5-diphenyl 1,3oxazoles in which toluene was used as the sole solvent. Pulse heights varied much more with a change in substituent groups on the solvent than with a similar change in the fluors. The observed correlation affords a means of organizing a large body of data and of gaining a further insight into the mechanism of scintillation. (auth)

• Research Organization: Borden Chemical Co., Philadelphia
• Sponsoring Organization: USDOE
• NSA Number: NSA-15-009104
• OSTI ID: 4104924
• Journal Information: Journal of Chemical Physics (U.S.), Journal Name: Journal of Chemical Physics (U.S.) Vol. Vol: 34; ISSN JCPSA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AROMATIC HYDROCARBONS
AROMATICS
ELECTRONS
ENGINEERING AND EQUIPMENT
FLUORESCENCE
FLUORS
HETEROCYCLICS
LIQUIDS
MATHEMATICS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXADIAZOLES
OXAZOLES
PHENYL RADICALS
PHOSPHORS
PULSES
RESONANCE
SCINTILLATIONS
SOLUTIONS
SOLVENTS
TOLUENE