Disintegration of O{sup 16} and C{sup 12} by Fast Neutrons

Disintegration of O{sup 16} and C{sup 12} by Fast Neutrons

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Publisher:

Published: 1963

Total Pages:

ISBN-13:

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The disintegration of O/sup 16/ and C/sup 12/ by fast neutrons was studied using a grid-type ionization chamber filled with CO/sub 2/-- Ar or CO/sub 2/-- Kr mixtures. Monoenergetic neutrons for studying the reactions from 5.0--8.8 Mev were produced with the D(d, n)He/sup 3/ reaction using a gas target. The alpha particle group from the O/sup 16/(n, alpha)C/sup 13/ reaction leaving C/sup 13/ in its ground state was studied over the entire energy range. The excitation function showed 21 resonances corresponding to excited states in O/sup 17/. The cross section varied from 2-206 mb. The alpha-particle group leaving C/sup 13/ in its 1st excited state was studied from 7.6--8.7 Mev, the cross section increasing from about 3- 12 mb. Unresolved alpha -particle groups leaving C /sup 13/ in its 2nd- and 3rd-excited states were studied from 8.1--8.7 Mev, the cross section decreasing from an estimated 30--8 mb. The alpha-particle group from the C/sup 12/(n, alpha)Be/sup 9/ reaction leaving Be/sup 9/ in its ground state was studied from 7.9-8.7 Mev. The cross section increased from 60--76 mb at 8.0 Mev and then decreased to 32 mb at 8.7 Mev. (auth).


Statistical Mechanics

Statistical Mechanics

Author: James Sethna

Publisher: OUP Oxford

Published: 2006-04-07

Total Pages: 374

ISBN-13: 0191566217

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In each generation, scientists must redefine their fields: abstracting, simplifying and distilling the previous standard topics to make room for new advances and methods. Sethna's book takes this step for statistical mechanics - a field rooted in physics and chemistry whose ideas and methods are now central to information theory, complexity, and modern biology. Aimed at advanced undergraduates and early graduate students in all of these fields, Sethna limits his main presentation to the topics that future mathematicians and biologists, as well as physicists and chemists, will find fascinating and central to their work. The amazing breadth of the field is reflected in the author's large supply of carefully crafted exercises, each an introduction to a whole field of study: everything from chaos through information theory to life at the end of the universe.


Cyclotron Produced Radionuclides

Cyclotron Produced Radionuclides

Author:

Publisher:

Published: 2008

Total Pages: 0

ISBN-13: 9789201002082

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This book provides a comprehensive treatment of cyclotrons, with a special emphasis on production of radionuclides. Individual sections are devoted to accelerator technology, theoretical aspects of nuclear reactions, the technology behind targetry, techniques for preparation of targets, irradiation of targets under high beam currents, target processing and target recovery. This book will appeal to scientists and technologists interested in translating cyclotron technology into practice, as well as postgraduate students in this field.


With Speed and Violence

With Speed and Violence

Author: Fred Pearce

Publisher: Beacon Press

Published: 2007-03-15

Total Pages: 369

ISBN-13: 0807085855

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Nature is fragile, environmentalists often tell us. But the lesson of this book is that it is not so. The truth is far more worrying. Nature is strong and packs a serious counterpunch . . . Global warming will very probably unleash unstoppable planetary forces. And they will not be gradual. The history of our planet's climate shows that it does not do gradual change. Under pressure, whether from sunspots or orbital wobbles or the depredations of humans, it lurches-virtually overnight. —from the Introduction Fred Pearce has been writing about climate change for eighteen years, and the more he learns, the worse things look. Where once scientists were concerned about gradual climate change, now more and more of them fear we will soon be dealing with abrupt change resulting from triggering hidden tipping points. Even President Bush's top climate modeler, Jim Hansen, warned in 2005 that "we are on the precipice of climate system tipping points beyond which there is no redemption." As Pearce began working on this book, normally cautious scientists beat a path to his door to tell him about their fears and their latest findings. With Speed and Violence tells the stories of these scientists and their work-from the implications of melting permafrost in Siberia and the huge river systems of meltwater beneath the icecaps of Greenland and Antarctica to the effects of the "ocean conveyor" and a rare molecule that runs virtually the entire cleanup system for the planet. Above all, the scientists told him what they're now learning about the speed and violence of past natural climate change-and what it portends for our future. With Speed and Violence is the most up-to-date and readable book yet about the growing evidence for global warming and the large climatic effects it may unleash.


Galaxy Formation and Evolution

Galaxy Formation and Evolution

Author: Houjun Mo

Publisher: Cambridge University Press

Published: 2010-05-20

Total Pages: 841

ISBN-13: 0521857937

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A coherent introduction for researchers in astronomy, particle physics, and cosmology on the formation and evolution of galaxies.


The Great Deformation

The Great Deformation

Author: David Stockman

Publisher: Public Affairs

Published: 2013-04-02

Total Pages: 770

ISBN-13: 1586489127

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A former Michigan congressman and member of the Reagan administration describes how interference in the financial markets has contributed to the national debt and has damaging and lasting repercussions.