Introduced new openmc.data.atomic_weight(...) method
Introduced new openmc.data.atomic_weight(...) method

shikhar413/openmc,shikhar413/openmc,amandalund/openmc,amandalund/openmc,amandalund/openmc,shikhar413/openmc,walshjon/openmc,liangjg/openmc,wbinventor/openmc,amandalund/openmc,walshjon/openmc,johnnyliu27/openmc,shikhar413/openmc,paulromano/openmc,wbinventor/openmc,mit-crpg/openmc,paulromano/openmc,mit-crpg/openmc,liangjg/openmc,smharper/openmc,smharper/openmc,johnnyliu27/openmc,paulromano/openmc,bhermanmit/openmc,liangjg/openmc,johnnyliu27/openmc,walshjon/openmc,mit-crpg/openmc,liangjg/openmc,walshjon/openmc,paulromano/openmc,johnnyliu27/openmc,bhermanmit/openmc,mit-crpg/openmc,wbinventor/openmc,wbinventor/openmc,smharper/openmc,smharper/openmc