Approved fo r public release; distribution IS unlimited. Los Alamos NAT I ONAL LABO RATORY ---- EST.I94] ---- Title: Author(s): Intended for: Shock Initiation Behavior of PBXN-9 Determined by Gas Gun Experiments Na than iel J. Sanchez Richard L. Gustavsen Daniel E. Hoo ks APS Los Alamos National Laboratory, an affirmative action/equal opportunity employer, is operated by the Los Alamos National Security, LLC for the National Nuclear Security Administration of the U.S. Department of Energy under contract DE-AC52-06 NA25396_ By acceptance of this article, the publisher recognizes that the U.S. Government retains a nonexclusive, royalty-free license to publish or reproduce the published form of this contribution, or to allow others to do so, for U.S. Government purposes. Los Alamos National Lab oratory requests that the publisher identify this article as work performed under the auspices of the U.S. Department of Energy. Los Alamos National Laboratory strongly supports academic freedom and a researcher's right to publish; as an institution, however, the Laboratory does not endorse the viewpoint of a publication or guarantee its technical correctness. Form 836 (7/06)