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Cyclohexane gamma radiolysis

The initial yields of the ions have been determined from gamma radiolysis in cyclohexane at a pressure of 55 torr by isotopic labelling techniques. In Table 6 we show the initial yields of the various ions together with those obtained from mass-spectrometric determinations at very low pressure. The yields are given as ion-pair yields, i.e. the yield of species per ion pair produced. The ion-pair yield M/N can be converted into species produced per unit energy absorbed, by multiplication by the yield of ionization G = 4.4 (lOOeV)" We see that the decomposition of the parent ion is appreciably suppressed in the gas at 55 torr, due to collisional deactivation. [Pg.757]

TABLE 6. Fragmentation pattern of the ions in cyclohexane obtained mass spectrometrically (70 eV electrons) and from gamma radiolysis of cyclohexane at 55 torr ... [Pg.757]

FIGURE 2. The yield of excess electrons scavenged by methyl bromide as a function of methyl bromide concentration in the gamma radiolysis of cyclohexane (lower scale). The yield of survival as a function of time for the charged species after instantaneous irradiation in cyclohexane (upper scale) the upper curve has been obtained with equation 31, the lower one with a more extensive treatment (see text)... [Pg.761]

TABLE 12. Yields ofproducts in the gamma radiolysis of cyclohexane ... [Pg.774]

In Table 12 we have presented the yields of products in solid cyclohexane, irradiated TABLE 13. Yields of products in the gamma radiolysis of 3-methylpentane ... [Pg.775]

In the following we first discuss the charge separation. Next, we consider some examples of the chemistry of the ions and of the excited states formed after recombination. Then we shall discuss the overall product formation for cyclohexane and n-pentane and indicate some general features of the decomposition of the various saturated hydrocarbons. All this work concerns the radiolysis with low LET radiation (gamma radiation, fast electrons). In the last section we give some results for radiation with different LETs for the case of cyclohexane. We also indicate how the non-homogeneity in the initial spatial distribution of the reactive species is accounted for in the (non-homogeneous) kinetics. [Pg.758]

The free radical mechanism of the gamma radiation induced decomposition of alkanesulfonyl chlorides (RSO2CI) in cyclohexane was studied C35-37) to obtain kinetic and thermochemical information on the reactions of alkylsulfonyl radicals CRSO2). Previously discussed systems are relatively simple and their kinetic analysis is almost straightforward. The radiolysis of alkanesulfonyl chlorides presents a more complex situation. The problems encountered in the radiolysis of alkanesulfonyl chlorides will be illustrated in the C-C6H12 MeS02Cl system (36,37). [Pg.178]


See other pages where Cyclohexane gamma radiolysis is mentioned: [Pg.205]    [Pg.351]    [Pg.510]   
See also in sourсe #XX -- [ Pg.163 ]




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