X-ray Absorption Edges


     1a  2a  3b  4b  5b  6b  7b      8       1b  2b  3a  4a  5a  6a  7a  0

     1                                                                   2
     H                                                                   He

     3   4                                           5   6   7   8   9   10
     Li  Be                                          B   C   N   O   F   Ne

     11  12                                          13  14  15  16  17  18
     Na  Mg                                          Al  Si  P   S   Cl  Ar

     19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36
     K   Ca  Sc  Ti  V   Cr  Mn  Fe  Co  Ni  Cu  Zn  Ga  Ge  As  Se  Br  Kr

     37  38  39  40  41  42  43  44  45  46  47  48  49  50  51  52  53  54
     Rb  Sr  Y   Zr  Nb  Mo  Tc  Ru  Rh  Pd  Ag  Cd  In  Sn  Sb  Te  I   Xe

     55  56  57  72  73  74  75  76  77  78  79  80  81  82  83  84  85  86
     Cs  Ba  La  Hf  Ta  W   Re  Os  Ir  Pt  Au  Hg  Tl  Pb  Bi  Po  At  Rn

     87  88  89  104 105    
     Fr  Ra  Ac  Rf  Ha    

Lanthanides    58  59  60  61  62  63  64  65  66  67  68  69  70  71
               Ce  Pr  Nd  Pm  Sm  Eu  Gd  Tb  Dy  Ho  Er  Tm  Yb  Lu

Actinides      90  91  92  93  94  95  96  97  98  99  100 101 102 103
               Th  Pa  U   Np  Pu  Am  Cm  Bk  Cf  Es  Fm  Md  No  Lr

Note: Selecting any of the elements from the periodic table above will retrieve ascii files containing tabulations of the characteristic x-ray absorption edge energies, and of the anomalous scattering coefficients f' and f" as a function of incident x-ray energy.

Note: To generate a plot of selected scattering coefficients use the forms interface to this data.

Where this data came from: The scattering factor data files indexed through the table above were calculated using the subroutine library by Brennan and Cowan (see references). The values for f' and f" are derived using the theoretical approximation developed by Cromer and Liberman. This theory gives accurate values far from an absorption edge but does not account for the effects of neighboring atoms, which can be very substantial near an absorption edge. Before conducting an anomalous scattering experiment close to an absorption edge it is therefore advisable to determine the actual scattering behaviour of your sample (see theory v. experiment).
Other periodic table interfaces to elemental properties:
X-ray properties from W.H.McMaster's compilation of cross-sections The Pictorial Periodic Table NMR periodic table WebElements home page UBC (text-only interface) YOGI (work in progress) PeriodiCity
back to X-ray Anomalous Scattering
Ethan A Merritt ©1996-2010/ merritt@u.washington.edu / Biomolecular Structure Center at UW