Title

Dose Rate Effects In Liquid Hydrocarbon Radiolysis

Description

Previous hydrocarbon radiolyses have shown product differences that might have been attributed to dose rate differences. During this study, the effects of extremely high dose rates on products of hydrocarbon radiolyses were examined. Cyclohexane, hexane, and pentane were irradiated at 2 x 1016, 5 x 1020, and 5 x 1023 ev/g-sec. Radiation dose ranged from 1019 to 1020 ev/g.The products from cyclohexane: hydrogen, cyclohexane and dicyclohexyl did not change with dose rate. Experiments using cyclohexane for hydrogen scavenging or deuterium labeling gave no evidence for dose rate effects occurring in radiation spurs.Low molecular weight products from hexane change slightly with dose rate; C12 products from hexane and C10 products from pentane show small but definite dose rate dependence.At the high dose rates investigated, dose rate does not control product ratios. The results indicate a more marked dependence on dose rate might be found at doses lower than examined here.

Date

1961

Index Abstract

Contrails only

Photo Quality

Incomplete

Report Number

ASD TR 61-169

Creator

Nevitt, T. D.

Wilson, W. A.

Corporate Author

American Oil Company, Research and Development Department

Laboratory

Directorate of Materials and Processes

Extent

27

Identifier

AD0267149

AD0267149

Access Rights

OTS

Distribution Classification

1

Contract

AF 33(616)-7089

DoD Project

7360

DoD Task

73607

DTIC Record Exists

Yes

Distribution Change Authority Correspondence

None

Report Availability

Full text available by request

Date Issued

1961-06

Abstract

Previous hydrocarbon radiolyses have shown product differences that might have been attributed to dose rate differences. During this study, the effects of extremely high dose rates on products of hydrocarbon radiolyses were examined. Cyclohexane, hexane, and pentane were irradiated at 2 x 1016, 5 x 1020, and 5 x 1023 ev/g-sec. Radiation dose ranged from 1019 to 1020 ev/g.The products from cyclohexane: hydrogen, cyclohexane and dicyclohexyl did not change with dose rate. Experiments using cyclohexane for hydrogen scavenging or deuterium labeling gave no evidence for dose rate effects occurring in radiation spurs. Low molecular weight products from hexane change slightly with dose rate; C12 products from hexane and C10 products from pentane show small but definite dose rate dependence.At the high dose rates investigated, dose rate does not control product ratios. The results indicate a more marked dependence on dose rate might be found at doses lower than examined here.

Type

report

Provenance

Lockheed Martin Missiles & Fire Control

Format

vi, 27 pages : ill. ; 28 cm.

Subject

Chemical Reactions

Chromatographic Analysis

Cyclohexanes

Dosimeters

Gamma Rays

Hexanes

Hydrocarbons

Ionization

Liquids

Pentanes

Damage

Radiation Effects

Reaction Kinetics

Test Equipment

Test Methods

Publisher

Wright-Patterson Air Force Base, OH : Aeronautical Systems Division, Air Force Systems Command, United States Air Force

NTRL Accession Number

AD267149

Distribution Conflict

No