Overdriven-detonation and sound-speed measurements in PBX-9501 and the {open_quote}{open_quote}thermodynamic{close_quote}{close_quote} Chapman{endash}Jouguet pressure

Journal Article · Sun Dec 01 00:00:00 EST 1996 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.363681· OSTI ID:389262

Fritz, J N; Hixson, R S; Shaw, M S; Morris, C E; McQueen, R G ^[1]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

Sound speeds, at pressure, and the overdriven Hugoniot were measured for the plastic-bonded explosive PBX-9501. The two curves intersect at the Chapman{endash}Jouguet (CJ) state because of the sonic condition {ital D}={ital c}+{ital u}. This permitted a novel determination of the {open_quote}{open_quote}thermodynamic{close_quote}{close_quote} CJ pressure. A value of 34.8{plus_minus}0.3 GPa was obtained. The data permit a direct experimental determination of the isentropic gamma, {gamma}{sub {ital S}}={minus}({partial_derivative}ln{ital P}/{partial_derivative}ln{ital V}){sub {ital S}}, and the Gr{umlt u}neisen parameter, {gamma}={ital V}({partial_derivative}{ital P}/{partial_derivative}{ital E}){sub {ital V}}, in the overdriven pressure range. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 389262
• Journal Information: Journal of Applied Physics, Vol. 80, Issue 11; Other Information: PBD: Dec 1996
• Country of Publication: United States
• Language: English

Related Subjects

45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
EXPLOSIVES
DETONATION WAVES
PBX DEVICES
SOUND WAVES
VERY HIGH PRESSURE
GRUENEISEN CONSTANT
EQUATIONS OF STATE
SHOCK WAVES
SOUND VELOCITY
HUGONIOTS