Atom density
Isotope  atom/barn·cm
C-14     1.8462E-09
O-16     4.7923E-02
Cl-36    1.0000E-06
Ca-41    1.0000E-06
Ni-59    1.0000E-06
Se-79    5.0582E-07
Zr-93    6.3637E-05
Rb-93    1.6072E-12
Sr-90    4.8584E-05
Sr-93    2.3719E-10
Y-93     1.9886E-08
Y-95     3.8958E-10
Nb-93m   6.6305E-11
Nb-94    6.2143E-11
Nb-95    1.9348E-06
Mo-93    1.1478E-14
Mo-95    6.0803E-05
Mo-99    1.7898E-07
Mo-101   6.2291E-10
Tc-99m   1.4716E-08
Tc-99    6.6733E-05
Tc-101   6.0649E-10
Ru-101   6.5615E-05
Ru-103   2.3665E-06
Rh-103   3.4702E-05
Pd-107   1.8503E-05
Pd-109   8.5605E-09
Ag-109   6.0729E-06
Sn-126   1.2852E-06
Sb-126   2.3835E-10
Sb-126m  3.1762E-13
Sb-129   1.9663E-09
Te-129m  6.4572E-08
I-129    1.0251E-05
I-133    6.1772E-08
I-135    1.8776E-08
Xe-133   3.7597E-07
Xe-135   1.0156E-08
Cs-133   6.9874E-05
Cs-135   3.4626E-05
Cs-137   7.5114E-05
Pr-143   6.9646E-07
Pr-147   2.1435E-10
Pr-149   2.0197E-11
Nd-143   4.6567E-05
Nd-145   3.8049E-05
Nd-147   2.5090E-07
Nd-149   9.9358E-10
Pm-147   7.4886E-06
Pm-149   4.4831E-08
Pm-151   8.6483E-09
Sm-147   4.7086E-06
Sm-149   1.3806E-07
Sm-150   1.6254E-05
Sm-151   9.7106E-07
Sm-152   6.3220E-06
Sm-153   3.8127E-08
Sm-155   2.3852E-11
Eu-151   1.5639E-09
Eu-152   3.2421E-09
Eu-153   6.6248E-06
Eu-155   3.4461E-07
Gd-155   5.4622E-09
Pb-210   3.8862E-18
Rn-222   9.3947E-21
Ra-226   1.4422E-15
Ra-228   9.3958E-22
Ac-227   3.2593E-16
Th-226   1.9447E-22
Th-229   5.9651E-14
Th-230   5.5098E-11
Th-232   1.2690E-11
Th-231   4.8649E-14
Pa-231   1.8739E-11
U-230    1.8514E-19
U-232    2.3106E-11
U-233    8.7082E-11
U-234    4.5729E-06  
U-235    2.4950E-04  
U-236    1.5044E-04  
U-237    2.7902E-07
U-238    2.1947E-02  
U-239    1.2843E-08
U-240    1.3550E-20
Np-235   6.7582E-13
Np-236   1.2422E-11
Np-236m  2.8487E-13
Np-237   1.9889E-05
Np-238   4.8303E-08
Np-239   1.8489E-06
Np-240   5.2420E-11
Pu-236   3.5918E-11
Pu-237   2.0813E-11
Pu-238   9.3508E-06
Pu-239   1.8344E-04
Pu-240   7.2862E-05
Pu-241   4.7994E-05
Pu-242   1.9005E-05
Pu-243   4.6387E-09
Pu-244   6.7468E-10
Pu-245   3.2226E-14
Pu-246   2.2173E-16
Am-239   1.8587E-16
Am-240   8.0708E-14
Am-241   2.2311E-06
Am-242   3.8342E-09
Am-242m  5.2630E-08
Am-243   5.6091E-06
Cm-242   5.9799E-07
Cm-243   2.2037E-08
Cm-244   2.3542E-06
Cm-245   1.3952E-07
Cm-246   1.3896E-08