How to Destroy A single Particle

hopefully this picture helps give you a visual of what am trying to do

currently I have a game object with a sphere collider as a trigger and a particle system (Shuriken)

I then add another script that must remove particles as they exit the trigger. Am having a hard time figuring out how to do this with any particle that exits the sphere to remove from the array list of that particular particle system

I know I must somehow use functions GetParticles , and SetParticles to do this Any clues or help would be very much appreciated

I think I need to -Grab access the array of the particle system -find the correct particle that exited -delete it -set the new array back without the deleted particle

My questions are -how do I know which particle that left what index -how to remove the particular particle -and set the correct particle array back

this is what i currently have that am using to get a deeper understanding on how to access all the info i need to achieve what i want.

public class BlastRadius : MonoBehaviour {

 Particle [] particleArray;
 int particleCount;
 
 

 void Start () {
     particleArray = new Particle[particleCount];
 }
 
 // using to understand how info is stored within the particle system
 void Update () {
     particleCount = gameObject.particleSystem.particleCount;
     particleArray = new Particle[ particleCount ];
     //Debug.Log(particleCount );
 //    Debug.Log ( particleArray);
 }

     //removes partical on exit
 void OnTriggerExit( Collider col ){
         removeParticle();
     
 }
 
 void findParticle(){
             //somehow find the particular particle i want to destroy
 }
 
 void removeParticle(){
             //then remove it
     //remove(findParticle());
 }

}