Ernest O. Wollan

Ernest Omar Wollan (November 6, 1902 – March 11, 1984) was an American physicist who made major contributions in the fields of neutron scattering and health physics.After earning a bachelor's degree at Concordia College in 1923, he undertook graduate study at the University of Chicago, where he investigated X-ray scattering under Arthur Compton and received a Ph.D. in 1929.After some early setbacks, in December 1944 Wollan and chemist Lyle Benjamin Borst successfully used neutron diffraction to produce "rocking curves" for crystals of gypsum and sodium chloride (salt).[7] In collaboration with Clifford G. Shull, who joined him at ORNL in 1946, he developed neutron diffraction methodology used for determining atomic resolution structure of substances.In his Nobel lecture Shull spoke of Wollan's contributions and expressed regret that his colleague had not lived long enough to share in the prize.
Ernest O. Wollan (left) and Clifford Shull working with a double-crystal neutron spectrometer at the ORNL X-10 graphite reactor in 1949.
Hand-plotted rocking curves for Bragg scattering from single sodium chloride (salt) crystals at the X-10 reactor at Oak Ridge, obtained by Ernest O. Wollan and Lyle B. Borst in December 1944.
Clifford Shullphysicistneutron scatteringhealth physicsGlenwood, MinnesotaConcordia CollegeUniversity of ChicagoX-ray scatteringArthur ComptonNorth Dakota State CollegeWashington University in St. LouisZurichNational Research Councilcosmic raysradiumMetallurgical LaboratoryEnrico FermiManhattan Projectfilm badge dosimeternuclear chain reactionChicago PileClinton PileX-ray diffractionneutronsOak Ridge National LaboratoryspectrometergypsumchemistLyle Benjamin Borstneutron diffractionrocking curvessodium chlorideWorld War IIX-10 Graphite ReactorClifford G. ShullNobel Prize in Physicsnuclear powerMinnesotaWollan IslandCrystal SoundAmerican Physical Societyhonorary Doctor of ScienceJohn Price Wetherill MedalTennessee Encyclopedia of History and CulturePhysics TodayBibcodeProceedings of the National Academy of Sciences of the United States of AmericaActa Crystallographica Section AArgonne National LaboratoryORNL ReviewClinton LaboratoriesScienceThe New York TimesHealth Physics Society NewsletterWorld Scientific PublishingAustralian Antarctic Data CentreConcordia College Archives