Materials available for mixing by TOPS®

Materials can be referenced by chemical symbol, atomic number, or matid.

Date refers to date of most recent calculation in month/year format.

NEW NEW NEW New opacity tables for hydrogen thru silicon were placed on the web page on March 31, 2000. Users can still access the old opacity tables by using the previous matid number for the element, which is shown below. All of the current elements are also available on a more detailed photon energy grid. Interested users should read the dense photon energy grid page for instructions on accessing this data. 

           Atomic Atomic  CURRENT          PREVIOUS           1977
  Element  Number Symbol   MATID     DATE   MATID     DATE    MATID
__________ ______ ______  _______   _____  ________  _____   _______
Hydrogen      1     H      l15253    3/00   l15252    9/95    t15250
Helium        2     He     l15763    3/00   l15762    9/95    t15760
Lithium       3     Li     l12293    3/00   l12291   11/92    t12290
Beryllium     4     Be     l12025    3/00   l12023   11/92    t12020
Boron         5     B      l12333    3/00   l12331   12/92    t12330
Carbon        6     C      l17833    3/00   l17831   12/92    t17830
Nitrogen      7     N      l15003    3/00   l15001   12/92    t15000
Oxygen        8     O      l15013    3/00   l15011   12/92    t15010
Fluorine      9     F      l15043    3/00   l15041   11/92    t15040
Neon         10     Ne     l15413    3/00   l15411   11/92    t15410
Sodium       11     Na     l12442    3/00   l12440    7/93    t12448
Magnesium    12     Mg     l12863    3/00   l12861    9/93    t12860
Aluminum     13     Al     l13718    3/00   l13716    1/96    t13710
Silicon      14     Si     l13813    3/00   l13811    5/96    t13810
Phosphorus   15     P    * l13911   11/96   l13911   11/96    t13910
Sulfur       16     S    * l14012   10/96   l14012   10/96    t14010
Chlorine     17     Cl   * l15021   12/96   l15021   12/96    t15020
Argon        18     Ar   * l15172   11/96   l15172   11/96    t15170
Potassium    19     K    * l12461    2/97   l12461    2/97    t12460
Calcium      20     Ca   * l12031    2/97   l12031    2/97    t12030
Scandium     21     Sc   * l12181    8/97   l12181    8/97    none
Titanium     22     Ti   * l12961    4/97   l12961    4/97    t12960
Vanadium     23     V    * l12551    6/97   l12551    6/97    t12550
Chromium     24     Cr   * l13071    6/97   l13071    6/97    t13070
Manganese    25     Mn   * l13081    9/97   l13081    9/97    t13080
Iron         26     Fe   * l12142    5/97   l12142    5/97    t12140
Cobalt       27     Co   * l13121   12/97   l13121   12/97    t13120
Nickel       28     Ni   * l13101    9/97   l13101    9/97    t13100
Copper       29     Cu   * l13331    1/98   l13331    1/98    t13330
Zinc         30     Zn   * l13141    1/98   l13141    1/98    t13140
* The elements from phosphorus to zinc have not been recalculated, but more low density points have been added to each element.

Please mail questions or comments to:
LANL T-4 Opacities <opacity@t4.lanl.gov>