How to create a link between particle and script C#

Hi everyone!

I would like that when a bullet is shot, an explosion to be created at the entry of the weapon. So I created a particule system, linked to a prefab and a SpecialEffects script. But now I would like to do something like "if bullet shot -> explosion" "else -> do nothing" but I don't know how to translate that in a C# language... I'm totally novice in scripting...

These are my WeaponScript and my SpecialEffectsHelper (sorry for the french comments, but they have no big importance ^^) :

using UnityEngine;

public class WeaponScript : MonoBehaviour {

 public Transform shotPrefab;

   
 public float shootingRate = 0.25f;

 private float shootCooldown;

 void Start()
 {
     shootCooldown = 0f;
 }

 void Update()
 {
     if (shootCooldown > 0)
     {
         shootCooldown -= Time.deltaTime;
     }
 }

   
 public void Attack(bool isEnemy)
 {
     if (CanAttack)
     {
         shootCooldown = shootingRate;

         
         var shotTransform = Instantiate(shotPrefab) as Transform;

        
         shotTransform.position = transform.position;

       
         ShotScript shot = shotTransform.gameObject.GetComponent<ShotScript>();
         if (shot != null)
         {
             shot.isEnemyShot = isEnemy;
         }

        
         MoveScript move = shotTransform.gameObject.GetComponent<MoveScript>();
         if (move != null)
         {
             move.direction = this.transform.right; // ici la droite sera le devant de notre objet
         }
     }
 }

 public bool CanAttack
 {
     get
     {
         return shootCooldown <= 0f;
     }
 }

}

using UnityEngine;

/// /// Effets de particules sans efforts /// public class SpecialEffectsHelper : MonoBehaviour { ///

 public ParticleSystem explosionEffect;

 void Awake()
 {
     // On garde une référence du singleton
     if (Instance != null)
     {
         Debug.LogError("Multiple instances of SpecialEffectsHelper!");
     }

     Instance = this;
 }

 /// <summary>
 /// Création d'une explosion à l'endroit indiqué
 /// </summary>
 /// <param name="position"></param>
 public void Explosion(Vector3 position)
 {
     instantiate(explosionEffect, position);
 }

 /// <summary>
 /// Création d'un effet de particule depuis un prefab
 /// </summary>
 /// <param name="prefab"></param>
 /// <returns></returns>
 private ParticleSystem instantiate(ParticleSystem prefab, Vector3 position)
 {
     ParticleSystem newParticleSystem = Instantiate(
       prefab,
       position,
       Quaternion.identity
     ) as ParticleSystem;

     // Destruction programmée
     Destroy(
       newParticleSystem.gameObject,
       newParticleSystem.startLifetime
     );

     return newParticleSystem;
 }

}

I would be nice if someone could help me :)