Energetic Charged-Particle Interactions with Atmospheres and by Robert E. Johnson

By Robert E. Johnson

On attending a convention at the Jovian satellites at UCLA, I heard Lou Lanze­ rotti vigorously current the fascinating facts at the sputtering of water ice via Me V protons fascinated about W. L. Brown at AT&T Bell Labs. In his inimitable means he made transparent that this new digital sputtering method was once very poorly below­ stood and was once extremely important for floor homes of sattelites. i used to be immedia­ tely hooked, and feature been operating ever given that with Lanzerotti, Brown, my col­ league at Virginia, John dull, and Bo Sundqvist at Uppsala on knowing the ejection of fabric from surfaces and utilizing laboratory effects to intere­ sting planetary difficulties. during scripting this booklet I additionally had the advantage of spending a semester with the Planetary Geosciences staff in Hawaii, due to Tom McCord, a time period with Doug Nash at JPL, and a interval ot time with the crowd at Catania. The e-book used to be all started with the encouragement of Lou Lanzerotti. The writing has long past slowly because the box has been altering speedily. Even now i believe it really is incom­ plete, because the attention-grabbing Halley dirt information have only recently been interpreted intimately, Voyager has lately visited Neptune, and the knowledge on Pluto are swiftly bettering. notwithstanding, lots of the ideas for plasma ion alteration of surfaces and gases were confirmed permitting, i'm hoping, a coherent and precious body­ paintings for incorporating either new laboratory and planetary data.

Show description

Read or Download Energetic Charged-Particle Interactions with Atmospheres and Surfaces PDF

Best astrophysics & space science books

The galactic black hole: Lectures on general relativity and astrophysics

Those lectures offer a scientific advent to the physics/astrophysics and arithmetic of black holes at a degree compatible for graduate scholars, postdocs and researchers in physics, astrophysics, astronomy, and utilized arithmetic.

The Scientific Papers of Sir George Darwin: Periodic Orbits and Miscellaneous Papers

Sir George Darwin (1845-1912) was once the second one son and 5th baby of Charles Darwin. After learning arithmetic at Cambridge he learn for the Bar, yet quickly back to technology and to Cambridge, the place in 1883 he used to be appointed Plumian Professor of Astronomy and Experimental Philosophy. His relations house is now the positioning of Darwin collage.

The Astrophysics of Emission-Line Stars

Many sorts of stars express conspicuous emission strains of their optical spectra. those stars are generally often called emission line stars. Emission line stars are beautiful to many folks as a result of their excellent phenomena and their variability. The Astrophysics of Emission Line Stars deals normal info on emission line stars, ranging from a short creation to stellar astrophysics, after which relocating towards a extensive review of emission line stars together with early and overdue variety stars in addition to pre-main series stars.

U.S. Astronomy and Astrophysics: Managing an Integrated Program

Committee at the association and administration of analysis in Astronomy and Astrophysics, house reports Board, Board on Physics and Astronomy, department on Engineering and actual Sciences, nationwide examine Council

In its financial yr 2002 price range precis rfile the Bush management expressed concern-based partly at the findings and conclusions of 2 nationwide examine Council studies-about fresh traits within the federal investment of astronomy and astrophysics learn. The President's funds blueprint recommended that now could be the time to handle those issues and directed the nationwide technological know-how origin (NSF) and the nationwide Aeronautics and area management (NASA) to set up a blue ribbon panel to (1) check the organizational effectiveness of the federal learn firm in astronomy and astrophysics, (2) think of the professionals and cons of shifting NSF's astronomy duties to NASA, and (3) recommend substitute thoughts for addressing concerns within the administration and association of astronomical and astrophysical learn. NASA and NSF requested the nationwide study Council to hold out the speedy evaluate asked by way of the President. This document, concentrating on the jobs of NSF and NASA, offers the result of that review.

Extra resources for Energetic Charged-Particle Interactions with Atmospheres and Surfaces

Example text

However, the Pauli principle must be applied, and each of the constituents moves relative to the center of mass of its parent atom or molecule. As this motion is superimposed on the overall collisional motion, the description of a collision can be complex even for the simplest atoms. Rather than solve the complete many-body system, the interaction potential between the atomic centers is averaged over the motion of the electrons. This separation of the motion of the electrons and nuclei. based on their huge differences in mass, is referred to as the Born-Oppenheimer separation (Torrens 1972; Johnson 1982).

A width to the state. Therefore, the maximum in the cross section occurs when L\E equals the excitation energy hw. This is referred to as the Massey criterion. Many of the approximations used to describe such transitions incorporate only the initial and final states. , curve crossing transitions); and weak interactions, Collision Physics 50 for which the initial charge distribution can be considered static. This parallels the division used above to calculate the interaction potentials. The first case applies to velocities comparable to or smaller than the speeds of the constituent particles of the target and is generally associated with the intermediate range interactions.

_.... 1020L-~~----~-~----~-~ 10 2 103 104 EA 8A (keV - de g) Fig. 6. Angular differential cross section experiment for He+ +Ar and Ne+ +Ar at three values of EA, 25keV, - - - 50keV, ---100 keY. Approximate power laws indicated by n. (Fuls et al. 1957) where an is given in Appendix 2B. This shows explicitly that the deflection is determined primarily by the nature of the potential near the distance of closest approach of the colliding particles. Therefore, it is not necessary to know the potential accurately at all R in order to obtain an estimate of the deflection function as long as V/E« 1.

Download PDF sample

Rated 4.08 of 5 – based on 40 votes