Measurement of microdoshoetric spectrum and radial dose distribution of

1

4N

+

1ions with energy of 66-119keV after passing through a PET （C

8

0H

9

O

4

） film with athickness of 4 u m were presented. As a function of

1

4N+1 ion energy and beamintensity I

the dose-mean specific energy by single event z1D was measured. Thedependance of

1

4N

+

1 ion range in PET film on ion energy was calculated by TIRM92Monte Carlo Program. The results of measurements and calculations were comparedand discussed.