Observational Studies of Photonuclear Reactions Triggered by Lightning Discharges

Observational Studies of Photonuclear Reactions Triggered by Lightning Discharges PDF Author: Yuuki Wada
Publisher:
ISBN: 9789811604607
Category :
Languages : en
Pages : 0

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Book Description
This book presents the first simultaneous detection of neutrons and positrons after a terrestrial gamma-ray flash (TGF), a highest-energy transient phenomenon on the earth, triggered by a lightning discharge, based on innovative ground-based observations made in the Hokuriku area of Japan. TGFs, known to be produced by lightning discharges since the 1990s, has been theoretically predicted to react with atmospheric nuclei via photonuclear reactions because they comprise high-energy photons of more than 10 MeV, but such photonuclear reactions by lightning discharges, which produce neutrons and unstable isotopes emitting positrons, were not observationally confirmed. The reactions and propagations of their products in the atmosphere are modeled with Monte Carlo simulations to quantitatively evaluate observations of TGFs, neutrons, and positrons at ground level. The successful comparison between observation and simulation is presented, and demonstrates that lightning discharges to trigger photonuclear reactions and to even produce isotopes in the atmosphere.

Observational Studies of Photonuclear Reactions Triggered by Lightning Discharges

Observational Studies of Photonuclear Reactions Triggered by Lightning Discharges PDF Author: Yuuki Wada
Publisher:
ISBN: 9789811604607
Category :
Languages : en
Pages : 0

Get Book Here

Book Description
This book presents the first simultaneous detection of neutrons and positrons after a terrestrial gamma-ray flash (TGF), a highest-energy transient phenomenon on the earth, triggered by a lightning discharge, based on innovative ground-based observations made in the Hokuriku area of Japan. TGFs, known to be produced by lightning discharges since the 1990s, has been theoretically predicted to react with atmospheric nuclei via photonuclear reactions because they comprise high-energy photons of more than 10 MeV, but such photonuclear reactions by lightning discharges, which produce neutrons and unstable isotopes emitting positrons, were not observationally confirmed. The reactions and propagations of their products in the atmosphere are modeled with Monte Carlo simulations to quantitatively evaluate observations of TGFs, neutrons, and positrons at ground level. The successful comparison between observation and simulation is presented, and demonstrates that lightning discharges to trigger photonuclear reactions and to even produce isotopes in the atmosphere.

Observational Studies of Photonuclear Reactions Triggered by Lightning Discharges

Observational Studies of Photonuclear Reactions Triggered by Lightning Discharges PDF Author: Yuuki Wada
Publisher: Springer Nature
ISBN: 9811604592
Category : Technology & Engineering
Languages : en
Pages : 190

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Book Description
This book presents the first simultaneous detection of neutrons and positrons after a terrestrial gamma-ray flash (TGF), a highest-energy transient phenomenon on the earth, triggered by a lightning discharge, based on innovative ground-based observations made in the Hokuriku area of Japan. TGFs, known to be produced by lightning discharges since the 1990s, has been theoretically predicted to react with atmospheric nuclei via photonuclear reactions because they comprise high-energy photons of more than 10 MeV, but such photonuclear reactions by lightning discharges, which produce neutrons and unstable isotopes emitting positrons, were not observationally confirmed. The reactions and propagations of their products in the atmosphere are modeled with Monte Carlo simulations to quantitatively evaluate observations of TGFs, neutrons, and positrons at ground level. The successful comparison between observation and simulation is presented, and demonstrates that lightning discharges to trigger photonuclear reactions and to even produce isotopes in the atmosphere.

Observational Studies of Photonuclear Reactions Triggered by Lightning Discharges

Observational Studies of Photonuclear Reactions Triggered by Lightning Discharges PDF Author: Yuuki Wada
Publisher: Springer
ISBN: 9789811604614
Category : Technology & Engineering
Languages : en
Pages : 176

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Book Description
This book presents the first simultaneous detection of neutrons and positrons after a terrestrial gamma-ray flash (TGF), a highest-energy transient phenomenon on the earth, triggered by a lightning discharge, based on innovative ground-based observations made in the Hokuriku area of Japan. TGFs, known to be produced by lightning discharges since the 1990s, has been theoretically predicted to react with atmospheric nuclei via photonuclear reactions because they comprise high-energy photons of more than 10 MeV, but such photonuclear reactions by lightning discharges, which produce neutrons and unstable isotopes emitting positrons, were not observationally confirmed. The reactions and propagations of their products in the atmosphere are modeled with Monte Carlo simulations to quantitatively evaluate observations of TGFs, neutrons, and positrons at ground level. The successful comparison between observation and simulation is presented, and demonstrates that lightning discharges to trigger photonuclear reactions and to even produce isotopes in the atmosphere.

Replication and Evidence Factors in Observational Studies

Replication and Evidence Factors in Observational Studies PDF Author: Paul Rosenbaum
Publisher: CRC Press
ISBN: 100037002X
Category : Mathematics
Languages : en
Pages : 273

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Book Description
Outside of randomized experiments, association does not imply causation, and yet there is nothing defective about our knowledge that smoking causes lung cancer, a conclusion reached in the absence of randomized experimentation with humans. How is that possible? If observed associations do not identify causal effects in observational studies, how can a sequence of such associations become decisive? Two or more associations may each be susceptible to unmeasured biases, yet not susceptible to the same biases. An observational study has two evidence factors if it provides two comparisons susceptible to different biases that may be combined as if from independent studies of different data by different investigators, despite using the same data twice. If the two factors concur, then they may exhibit greater insensitivity to unmeasured biases than either factor exhibits on its own. Replication and Evidence Factors in Observational Studies includes four parts: A concise introduction to causal inference, making the book self-contained Practical examples of evidence factors from the health and social sciences with analyses in R The theory of evidence factors Study design with evidence factors A companion R package evident is available from CRAN.

Energy Research Abstracts

Energy Research Abstracts PDF Author:
Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 646

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Book Description


Fluka

Fluka PDF Author: Alfredo Ferrari
Publisher:
ISBN:
Category : Particles (Nuclear physics)
Languages : en
Pages : 410

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Book Description


Progress in Ultrafast Intense Laser Science XIII

Progress in Ultrafast Intense Laser Science XIII PDF Author: Kaoru Yamanouchi
Publisher: Springer
ISBN: 3319648403
Category : Science
Languages : en
Pages : 234

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Book Description
This thirteenth volume in the PUILS series covers a broad range of topics from this interdisciplinary research field, focusing on atoms, molecules, and clusters interacting in intense laser field and high-order harmonics generation and their applications. The series delivers up-to-date reviews of progress in ultrafast intense laser science, the interdisciplinary research field spanning atomic and molecular physics, molecular science, and optical science, which has been stimulated by the developments in ultrafast laser technologies. Each volume compiles peer-reviewed articles authored by researchers at the forefront of each their own subfields of UILS. Typically, each chapter opens with an overview of the topics to be discussed, so that researchers unfamiliar to the subfield, as well as graduate students, can grasp the importance and attractions of the research topic at hand; these are followed by reports of cutting-edge discoveries.

Progress in Ultrafast Intense Laser Science

Progress in Ultrafast Intense Laser Science PDF Author: Antonio Giulietti
Publisher: Springer Science & Business Media
ISBN: 3642038603
Category : Science
Languages : en
Pages : 223

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Book Description
This volume covers a range of topics from this interdisciplinary field, focusing on coherent responses of gaseous and condensed matter to ultrashort intense laser pulses, propagation of intense laser pulses, and laser-plasma interaction and its applications.

The Electrical Nature of Storms

The Electrical Nature of Storms PDF Author: D. R. MacGorman
Publisher: Oxford University Press, USA
ISBN: 9780195073379
Category : Language Arts & Disciplines
Languages : en
Pages : 436

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Book Description
Rapid progress during the last twenty years has created a host of new technologies for studying electrical storms, including lightning mapping systems, new radars, satellite sensors, and new ways of measuring electric field and particle charge. This book explains how these advances have revolutionized our understanding. The books provides substantial background material, making it accessible to a broad scientific audience.

Extreme Solar Particle Storms

Extreme Solar Particle Storms PDF Author: Fusa Miyake
Publisher: Programme: Aas-Iop Astronomy
ISBN: 9780750322300
Category : Science
Languages : en
Pages : 300

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Book Description
Extreme Solar Particle Storms: The hostile Sun provides a consolidated review of our current understanding of extreme solar events, or black swans, that leave our technological society vulnerable. Written by experts at the forefront of the growing field of solar storms, this book will be of interest to students and researchers, as well as those curious about the threat that our Sun poses to the modern world.