Fix interpretation of Snow(2020): update natural rather than isotopic scattering lengths

Author: Paul Kienzle

periodictable/nsf.py

@@ -105,25 +105,26 @@
     2H b_c 6.674(6) => 6.6681(27) [1]
     4He b_c 3.26(3) => 3.0982(21) [3] (see also [5], which gives 3.075(6))
     4He coherent = total cross sections computed from 4 pi b_c^2/100
-    nat-He computed from isotopic weighting of 3He and 4He
-    12C b_c 6.6535(14) => 6.6472(9) [1]
-    16O b_c 5.805(5) => 5.8037(29) [1]
+    natHe computed from isotopic weighting of 3He and 4He
+    natC b_c 6.6484(13) => 6.6472(9) [1]
+    natO b_c 5.805(4) => 5.8037(29) [1]
     17O b_c 5.6(5) => 5.867(4) [2]
     18O b_c 5.84(7) => 6.009(5) [2]
-    119Sn b_c 6.28(3) => 6.2239(13) [1]
+    natSn b_c 6.225(2) => 6.2239(13) [1]
     154Sm b_c 8.0(1.0) => 8.97(6) [4]
     153Eu b_c 8.22(12) => 8.85(3) [4]
     191Ir b_c => 12.1(9) [6]
     193Ir b_c => 9.71(18) [6]
-    207Pb b_c 9.286(16) => 9.4024(13) [1]
-    209Bi b_c 8.532(2) => 8.5242(18) [1]
+    natPb b_c 9.401(2) => 9.4024(13) [1]
+    natBi b_c 8.532(2) => 8.5242(18) [1]
 
     He total 1.34(2) => 1.188(5) [5] (ignored; using 4 pi b_c^2/100)
     Ar total 0.683(4) => 0.683(5) [5] (ignored; existing value is more precise)
     Kr total 7.68(13) => 7.685(26) [5]
     Xe total --- => 4.344(17) [5]
 
     [1] Snow (2020) 10.1103/PhysRevD.101.062004
+        (using average of gravity reflectometer and interferometer measurements)
     [2] Fischer (2012) 10.1088/0953-8984/24/50/505105
     [3] Haun (2020) 10.1103/PhysRevLett.124.012501
     [4] Kohlmann (2016) 10.1515/zkri-2016-1984
@@ -1329,14 +1330,14 @@ def sld_plot(table=None):
 5-B,,,5.30(4),,,,3.54(5),1.70(12),5.24(11),767.0(8.0)
 5-B-10,19.4,3,-0.2(4),-4.2(4),5.2(4),,0.144(6),3.0(4),3.1(4),3835.0(9.0)
 5-B-11,80.2,3/2,6.65(4),5.6(3),8.3(3),,5.56(7),0.21(7),5.77(10),0.0055(33)
-6-C,,,6.6484(13),,,,5.551(2),0.001(4),5.551(3),0.00350(7)
-6-C-12,98.89,0,6.6472(9),,,,5.559(3),0,5.559(3),0.00353(7)
+6-C,,,6.6472(9),,,,5.551(2),0.001(4),5.551(3),0.00350(7)
+6-C-12,98.89,0,6.6535(14),,,,5.559(3),0,5.559(3),0.00353(7)
 6-C-13,1.11,1/2,6.19(9),5.6(5),6.2(5),+/-,4.81(14),0.034(11),4.84(14),0.00137(4)
 7-N,,,9.36(2),,,,11.01(5),0.50(12),11.51(11),1.90(3)
 7-N-14,99.635,1,9.37(2),10.7(2),6.2(3),,11.03(5),0.50(12),11.53(11),1.91(3)
 7-N-15,0.365,1/2,6.44(3),6.77(10),6.21(10),,5.21(5),0.00005(10),5.21(5),0.000024(8)
-8-O,,,5.805(4),,,,4.232(6),0.000(8),4.232(6),0.00019(2)
-8-O-16,99.75,0,5.8037(29),,,,4.232(6),0,4.232(6),0.00010(2)
+8-O,,,5.8037(29),,,,4.232(6),0.000(8),4.232(6),0.00019(2)
+8-O-16,99.75,0,5.805(5),,,,4.232(6),0,4.232(6),0.00010(2)
 8-O-17,0.039,5/2,5.867(4),5.52(20),5.17(20),,4.20(22),0.004(3),4.20(22),0.236(10)
 8-O-18,0.208,0,6.009(5),,,,4.29(10),0,4.29(10),0.00016(1)
 9-F-19,100,1/2,5.654(12),5.632(10),5.767(10),+/-,4.017(14),0.0008(2),4.018(14),0.0096(5)
@@ -1498,14 +1499,14 @@ def sld_plot(table=None):
 49-In,,,4.065(20),,,,2.08(2),0.54(11),2.62(11),193.8(1.5)
 49-In-113,4.28,9/2,5.39(6),,,,3.65(8),0.000037(5),3.65(8),12.0(1.1)
 49-In-115,95.72,9/2,4.00(3),2.1(1),6.4(4),,2.02(2),0.55(11),2.57(11),202.0(2.0)
-50-Sn,,,6.225(2),,,,4.871(3),0.022(5),4.892(6),0.626(9)
+50-Sn,,,6.2239(13),,,,4.871(3),0.022(5),4.892(6),0.626(9)
 50-Sn-112,1,0,6.0(1.0)*,,,,4.5(1.5),0,4.5(1.5),1.00(11)
 50-Sn-114,0.66,0,6.0(3),,,,4.8(5),0,4.8(5),0.114(30)
 50-Sn-115,0.35,1/2,6.0(1.0)*,,,,4.5(1.5),0.3(3)*,4.8(1.5),30.0(7.0)
 50-Sn-116,14.3,0,6.10(1),,,,4.42(7),0,4.42(7),0.14(3)
 50-Sn-117,7.61,1/2,6.59(8),0.22(10),-0.23(10),,5.28(8),0.3(3)*,5.6(3),2.3(5)
 50-Sn-118,24.03,0,6.23(4),,,,4.63(8),0,4.63(8),0.22(5)
-50-Sn-119,8.58,1/2,6.2239(13),0.14(10),0.0(1),,4.71(8),0.3(3)*,5.0(3),2.2(5)
+50-Sn-119,8.58,1/2,6.28(3),0.14(10),0.0(1),,4.71(8),0.3(3)*,5.0(3),2.2(5)
 50-Sn-120,32.86,0,6.67(4),,,,5.29(8),0,5.29(8),0.14(3)
 50-Sn-122,4.72,0,5.93(3),,,,4.14(7),0,4.14(7),0.18(2)
 50-Sn-124,5.94,0,6.15(3),,,,4.48(8),0,4.48(8),0.133(5)
@@ -1656,10 +1657,10 @@ def sld_plot(table=None):
 81-Tl,,,8.776(5),,,,9.678(11),0.21(15),9.89(15),3.43(6)
 81-Tl-203,29.5,1/2,8.51(8),9.08(10),6.62(10),,6.14(28),0.14(4),6.28(28),11.4(2)
 81-Tl-205,70.5,1/2,8.87(7),5.15(10),9.43(10),+/-,11.39(17),0.007(1),11.40(17),0.104(17)
-82-Pb,,,9.401(2),,,,11.115(7),0.0030(7),11.118(7),0.171(2)
+82-Pb,,,9.4024(13),,,,11.115(7),0.0030(7),11.118(7),0.171(2)
 82-Pb-204,1.4,0,10.893(78),,,,12.3(2),0,12.3(2),0.65(7)
 82-Pb-206,24.1,0,9.221(78),,,,10.68(12),0,10.68(12),0.0300(8)
-82-Pb-207,22.1,1/2,9.4024(13),,,+/-,10.82(9),0.002(2),10.82(9),0.699(10)
+82-Pb-207,22.1,1/2,9.286(16),,,+/-,10.82(9),0.002(2),10.82(9),0.699(10)
 82-Pb-208,52.4,0,9.494(30),,,,11.34(5),0,11.34(5),0.00048(3)
 83-Bi-209,100,9/2,8.5242(18),8.26(1),8.74(1),,9.148(4),0.0084(19),9.156(4),0.0338(7)
 88-Ra-226,1620 Y,0,10.0(1.0),,,,13.0(3.0),0,13.0(3.0),12.8(1.5)