Momentum Transfer from a Nuclear Stand-Off Burst to a Potentially Hazardous Asteroid or Comet Nucleus

Details Momentum Transfer from a Nuclear Stand-Off Burst to a Potentially Hazardous Asteroid or Comet Nucleus Momentum Transfer from a Nuclear Stand-Off Burst to a Potentially Hazardous Asteroid or Comet Nucleus

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p23d1740p&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #P23D-1740

Statistics

Computation

[0545] Computational Geophysics / Modeling, [6000] Planetary Sciences: Comets And Small Bodies, [4343] Natural Hazards / Preparedness And Planning

Scientific paper

We present estimates of momentum transfer by ablation and β factor-like ejection of solid material from the surface of a Potentially Hazardous Object (PHO) by a stand-off nuclear burst. We consider parameters including object composition, shadowing effects of surface geometry, burst yield, and stand-off distance. We use radiation hydrocode models of x-ray energy deposition to estimate the response of a PHO to x-rays. We also use Monte Carlo models to estimate energy deposition from neutrons. These models yield estimates of the mass of vapor and solid material ejected from the surface of the PHO. A byproduct of the Monte Carlo models is an estimate of neutron activation of PHO material, a commonly quoted hazard of nuclear PHO deflection, which is negligible, of order tens of micrograms per kiloton of burst yield. The mass vaporized or ejected from the PHO, along with initial distributions and velocities can then be used to refine n-body models of velocity change and debris reaggregation.

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