Based on previous studies

the application of plant growth simulation algorithm for source pencils deployment of 60Co irradiator is feasible.In this paper

with an improved theory for calculating the source pencil deployment

implementation of algorithm is greatly improved

too.Three cases of 60Co irradiator in various computation scales are demonstrated.The results show that using the new version of code

not only the pencil deployment quality but also the calculating efficiency are improved obviously

and its range of application is also enlarged greatly.With enhanced practicality

the code provides a dependable method for optimizing source pencil deployment of 60Co irradiators.