RECOIL REACTIONS OF CARBON-11 IN n-HEXANE AND CYCLOHEXANE
Cyclohexane and n-hexane were irradiated with x rays from a 47 Mev electron synchrotron to produce the reaction C/sup 12/ ( gamma ,n)C/sup 11/. The distribution of the recoil C/sup 11/ i n hydrocarbons of low molecular weight was studied using gas chromatographic separation with a scintillation counter monitoring the exit gas stream. Cyclohexane was irradiated at 30, 0, and - 78 deg and n-hexane at 30 deg . The total C/sup 11/ produced was determined by irradiating carbon under comparable conditions, burning it to CO/sub 2/, and measuring its activity in the same manner. Under most conditions acetylene - C/ sup 11/ was the most abundant radioactive product with up to 15% of the total C/ sup 11/ appearing in this form. Methane - C/sup 11/ and ethylene C/sup 11/ were produced in 2 to 7% yield depending on cond itions. Radioactive ethane, propane, and propylene were separated; 4-carbon compounds were observed as a group. Since the yield of C/sup 11/ was small no attempts were made to analyze for it in the parent compound or others of similar size. The results are discussed in terms of various mechanisms for recoil reactions. It appears that they can be explained on the basis of random fragmentation of the irradiated material by the very energetic C/sup 11/ atoms and subsequent reactions of C/sup 11/H/sub x/ radicals with these fragments. (auth)
- Research Organization:
- Ames Lab., Ames, Iowa
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-030731
- OSTI ID:
- 4840460
- Report Number(s):
- IS-269; 0022-3654
- Journal Information:
- Journal of Physical Chemistry (U.S.), Journal Name: Journal of Physical Chemistry (U.S.) Vol. Vol: 65; ISSN JPCHA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
CARBON 11
CARBON COMPOUNDS
CARBON DIOXIDE
CHEMISTRY
CHROMATOGRAPHY
COMBUSTION
CYCLOALKANES
DISTRIBUTION
ELECTRONS
ETHANE
ETHYLENE
FREE RADICALS
GASES
HEXANE
HYDROCARBONS
IRRADIATION
METHANE
MOLECULES
MONITORING
NUCLEAR REACTIONS
PROPANE
REACTION KINETICS
RECOILS
SCINTILLATION COUNTERS
SEPARATION PROCESSES
SYNCHROTRONS
USES
WEIGHT
X RADIATION