diff --git a/TrimSPlib.js b/TrimSPlib.js
index 4b1679d..d98d44a 100644
--- a/TrimSPlib.js
+++ b/TrimSPlib.js
@@ -448,7 +448,75 @@ function StoppingCoefficients(Element)
 	"U":"7.29000,8.20400,19180.00000,586.29999,0.00267",
 	"":"0.00000,0.00000,0.00000,0.00000,0.00000"
     };
-    return StoppingCoefficientsICRU[Element];
+
+    // Updated Anderson-Ziegler table values for hydrogen projectiles using
+    // up-to-date stopping data from the IAEA database (https://www-nds.iaea.org/stopping/).
+    // For further details on their determination, see e.g.:
+    // R. M. L. McFadden at al., arXiv:2212.11081 [cond-mat.supr-con]
+    // https://doi.org/10.48550/arXiv.2212.11081
+    var StoppingCoefficientsIAEA = {
+        "H": "1.21941306,1.39705253,316.72610292,3622.08960714,0.03609996",
+        "Li": "2.55867734,2.98398784,672.22623329,223.63937274,0.05756479",
+        "Be": "2.13846776,2.43024550,1353.80005691,500.78353377,0.01143076",
+        "B": "2.92598306,3.33271910,1523.83401267,574.31712932,0.01671298",
+        "C": "2.51057212,2.84874359,1325.63086028,2111.57332043,0.03815981",
+        "N": "3.03231463,3.44621744,1287.27189959,3445.25706665,0.06909550",
+        "O": "2.58218404,2.91913321,2066.69556610,1937.28839450,0.01708201",
+        "Mg": "4.32219620,4.95332934,2711.05757349,99.32422512,0.01692829",
+        "Al": "4.16266645,4.73942640,3007.21967155,192.15430476,0.01478852",
+        "Si": "4.56277193,5.17964542,3812.93366288,249.45105835,0.00951865",
+        "Cl": "5.18954121,5.87010049,5726.20198003,338.90592713,0.00527894",
+        "Ca": "7.38419020,8.41800474,4257.94547049,311.84732092,0.01482602",
+        "Sc": "6.27366940,7.11486087,5202.32117316,349.64931132,0.00808596",
+        "Ti": "4.89215322,5.52996090,4733.05002706,821.54929980,0.01141794",
+        "V": "4.39418898,4.95984106,5216.28902299,873.00768319,0.00982301",
+        "Cr": "4.22355616,4.76724205,4805.40719904,1062.25237873,0.01508696",
+        "Mn": "3.45870888,3.89580224,5452.18588822,1778.16054656,0.01057380",
+        "Fe": "3.69846643,4.16916938,5392.90710239,1040.38447053,0.01152298",
+        "Co": "3.55890909,4.00775461,6796.04145497,933.86447935,0.00558368",
+        "Ni": "3.42262695,3.86234880,4759.65515188,520.18934465,0.02026669",
+        "Cu": "3.54912421,4.02142201,4344.22605325,128.32905834,0.02886218",
+        "Zn": "4.31895518,4.91763977,5346.03925560,46.16548699,0.01518164",
+        "Ga": "4.11015447,4.63998531,7681.41419449,149.38563152,0.00628772",
+        "Ge": "5.80984815,6.60667983,6039.04808738,87.19744473,0.01158192",
+        "Se": "5.58734301,6.31119973,8423.01872583,221.61559131,0.00530434",
+        "Br": "6.28480648,7.09489448,11732.76411988,150.96205589,0.00281298",
+        "Kr": "6.47378266,7.31581518,9199.06183849,216.98680923,0.00437111",
+        "Rb": "8.48759187,9.62951209,7271.11124671,272.67996745,0.00818815",
+        "Sr": "8.66447838,9.84912713,5979.31960977,334.15705556,0.01184544",
+        "Y": "7.54854264,8.54789357,6885.34110669,429.53252110,0.00930644",
+        "Zr": "6.24168401,7.04236496,10674.06252597,269.66181445,0.00339805",
+        "Nb": "5.96194954,6.72632300,10250.57513827,275.25886405,0.00386599",
+        "Mo": "5.58867862,6.29983727,9573.16605660,523.57577519,0.00473082",
+        "Pd": "4.74762031,5.34871025,8086.17802763,942.05721488,0.00842671",
+        "Ag": "5.42052240,6.17824432,4642.18214950,90.75350922,0.06061521",
+        "Cd": "4.89128643,5.50754704,11831.77188508,396.06905848,0.00412049",
+        "In": "5.98978289,6.77050040,6343.54720062,564.65410792,0.02270520",
+        "Sn": "6.73191335,7.61854414,6946.18830598,347.19391310,0.01677246",
+        "Sb": "7.92400389,8.99628409,5736.29881090,403.11722206,0.02973016",
+        "Xe": "8.96826400,10.16224223,8543.27304860,283.90067433,0.01019984",
+        "La": "8.16949326,9.21144395,13933.96869212,429.99442382,0.00347440",
+        "Nd": "8.60801371,10.26060598,6798.65217629,7.06731816,0.02713704",
+        "Gd": "8.38379061,9.50012183,10804.38767518,110.71066098,0.00761735",
+        "Tb": "8.69907359,10.36476708,5985.09307671,7.76175759,0.04237031",
+        "Dy": "6.69350026,7.81543484,5289.65107666,12.11560717,0.05746489",
+        "Er": "4.31497049,4.85346547,12995.54504003,691.00380321,0.00499022",
+        "Yb": "6.38304258,7.21491284,12327.74719685,82.30064162,0.00516845",
+        "Lu": "7.00205766,8.09268611,4589.67801229,31.06321362,0.11142124",
+        "Hf": "5.32763157,6.00140558,13853.49562768,206.93150053,0.00411522",
+        "Ta": "5.15280708,5.80545310,12417.25115167,231.48549646,0.00530723",
+        "W": "4.81261962,5.41579909,15245.84079976,286.09077182,0.00344862",
+        "Re": "4.26021967,4.80273372,3191.05524918,76051.48730893,0.00003161",
+        "Ir": "4.16543126,4.68849191,6887.94139926,4263.90641919,0.00000004",
+        "Pt": "4.62228847,5.20033612,16308.49878855,266.02263275,0.00309560",
+        "Au": "4.84253074,5.44769072,15602.21662947,412.25485588,0.00331383",
+        "Pb": "9.42473604,17.46235676,11946.86905435,0.00000001,0.00652912",
+        "Bi": "10.25823796,12.26670424,7765.05387481,7.37274504,0.02310050"
+    };
+
+    // prefer using stopping coefficients derived from data in the IAEA database;
+    // however, if they are unavailable, return those from ICRU Report 49
+    return (Element in StoppingCoefficientsIAEA) ? StoppingCoefficientsIAEA[Element] : StoppingCoefficientsICRU[Element];
 }