Repel system

Unity Engine
1

I have an exploding barrel with a script that makes it explode when it is hit twice. (There is some extra code in another script for it) I want the exploding barrel to repel objects in a certain area so it’s like an actual explosion. Any help?
Explosion Code:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Explode : MonoBehaviour
{
    public float health = 20f;
    public ParticleSystem explosion;

    public void TakeDamage(float amount)
    {
        health -= amount;
        if (health <= 0f)
        {
            StartCoroutine(explode());
        }
    }

    IEnumerator explode()
    {
        explosion.Play();
        var MR = gameObject.GetComponent<MeshRenderer>();
        Destroy(MR);
        yield return new WaitForSeconds(0.4f);
        Destroy(gameObject);
    }
}
2

When it explodes I would do an OverlapSphere to find nearby Rigidbodies and apply an Impulse force to all objects inside the blast radius (potentially scaled by the inverse of the distance to the center of the blast).