From abc1195c917bbcd437151704762383cc43d05b7c Mon Sep 17 00:00:00 2001
From: Pim Nelissen <pim.nelissen@protonmail.com>
Date: Thu, 12 Feb 2026 14:45:24 +0100
Subject: [PATCH] Rewrite preset isotope

---
 src/pg_rad/isotopes/presets.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/pg_rad/isotopes/presets.py b/src/pg_rad/isotopes/presets.py
index 5b8224b..9d07a65 100644
--- a/src/pg_rad/isotopes/presets.py
+++ b/src/pg_rad/isotopes/presets.py
@@ -1,4 +1,10 @@
 from .isotope import Isotope
 
 
-CS137 = Isotope("Cs-137", E=661.66, b=0.851)
+class CS137(Isotope):
+    def __init__(self):
+        super.__init__(
+            name="Cs-137",
+            E=661.66,
+            b=0.851
+        )