Radiation Chemical Studies with Cyclotron Beams. IV. The Effect of Water in the Heavy-ion Radiolysis of Liquid Acetone

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概要

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• A study was made of the effect of water on the LET dependence of the product yields for liquid acetone. Acetone containing 2 wt% water was subjected to irradiation by energetic <SUP>4</SUP>He, <SUP>12</SUP>C, and <SUP>14</SUP>N ions as well as by <SUP>60</SUP>Co γ rays at room temperature; the LET range was up to 80 eV Å<SUP>−1</SUP>. A significant effect of water was observed above 50 eV Å<SUP>−1</SUP>, where <I>G</I>(H<SUB>2</SUB>) and <I>G</I>(CO) showed continuous increases with an increase in LET. For pure acetone, <I>G</I>(H<SUB>2</SUB>) and <I>G</I>(GO) showed their peak values at 50 eV Å<SUP>−1</SUP>, indicating a saturation of decomposition in the ionization track, as has been reported previously. The present results may be interpreted in terms of the hydrogen-bonded network formed by the addition of water; this will expand the reaction zone outside the track and result in increases in the product yields without any waste of excessive energy in the high-LET region.

• 公益社団法人 日本化学会の論文

著者

• Imamura Masashi

  The Institute of Physical and Chemical Research

• MATSUI Masao

  The Institute of Physical and Chemical Research

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