update the revised stopping power coefficients for O, Si, and Nb

- the revised values use data from version 2023-03 of the IAEA's stopping power database, which includes error estimates that were absent from earlier versions (i.e., versions 2021-12 and earlier).

data/iaea_table.json

@@ -58,11 +58,11 @@
 	},
 	"O": {
 		"IAEA": [
-			2.58218404,
-			2.91913321,
-			2066.6955661,
-			1937.2883945,
-			0.01708201
+			2.64525591541112,
+			2.99207340296791,
+			1983.59086293942,
+			1899.40582231425,
+			0.0194714278702055
 		]
 	},
 	"F": {
@@ -94,11 +94,11 @@
 	},
 	"Si": {
 		"IAEA": [
-			4.56277193,
-			5.17964542,
-			3812.93366288,
-			249.45105835,
-			0.00951865
+			4.92174725194867,
+			5.61439738985486,
+			2614.54841139624,
+			369.526489722846,
+			0.0253413402253883
 		]
 	},
 	"P": {
@@ -307,11 +307,11 @@
 	},
 	"Nb": {
 		"IAEA": [
-			5.96194954,
-			6.726323,
-			10250.57513827,
-			275.25886405,
-			0.00386599
+			5.83800567770461,
+			6.58179495443619,
+			12601.224783492,
+			206.20626866439,
+			0.00270151372920993
 		]
 	},
 	"Mo": {
@@ -620,4 +620,4 @@
 	"": {
 		"IAEA": []
 	}
-}
+}