While particle system is alive play animation.

I have a falling cannonball attack that I would like the enemy units to continuously play the "getting hit" animation. I have tried both isPlaying and isAlive so far and I think the problem is with the while loop. Please can someone advise? The code below seems to completely crash the game as well when the attack is launched.

 void Update () {
      GameObject cannonball = GameObject.Find("Cannonball");
         GameObject ROF = GameObject.Find("RainOfFire2");
 
         if (cannonball.transform.GetChild(5).gameObject.GetComponent<ParticleSystem>().IsAlive() || ROF.transform.GetChild(5).gameObject.GetComponent<ParticleSystem>().IsAlive())
             alive = true;
         else
             alive = false;
 
         foreach (Unit unit in enemy.units)
             {
                 while (alive == true)
                 {
                     unit.photonView.RPC("HitAnimate", RpcTarget.Others);
                 }
             }    
 
     }
 }