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1,000+ results for "Cosmic Rays"

Exploding stars may have caused mass extinction on Earth, study shows

A new study led by University of Illinois astronomer Brian Fields explores the possibility that astronomical events were responsible for an extinction event 359 million years ago. Researchers found evidence suggesting long-lasting ozone-depletion, which could be caused by killer cosmic rays from nearby supernovae.

SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalProceedings of the National Academy of Sciences·DateAug 18, 2020

Underused part of the electromagnetic spectrum gets optics boost from 'metasurface'

Researchers at Tokyo University of Agriculture and Technology develop a novel collimator using a specially designed metasurface, enabling efficient manipulation of terahertz waves. This breakthrough has significant implications for next-generation wireless communications, security systems, biomedicine, and cultural heritage science.

T-ray camera speed boosted a hundred times over

A research team at the University of Warwick has developed a single-pixel terahertz imaging technology that reaches 100 times faster acquisition than the previous state-of-the-art. This breakthrough enables potential use in biomedical and industrial applications, including non-invasive security and medical screening.

SourceUniversity of Warwick·JournalNature Communications·DateJul 10, 2020

Excess neutrinos and missing gamma rays?

Researchers at Penn State suggest that supermassive black hole coronae could be the source of high-energy cosmic neutrinos, exceeding expectations. The new model predicts electromagnetic counterparts in soft gamma-rays, with next-generation detectors poised to explore this possibility.

SourcePenn State·JournalPhysical Review Letters·DateJun 30, 2020

How cosmic rays may have shaped life

Researchers propose that cosmic rays influenced the evolution of DNA-based life on Earth, promoting one form of molecular handedness over its mirror image. This idea suggests a connection between fundamental physics and the origin of life, with potential experiments to test their hypothesis.

SourceStanford University·JournalThe Astrophysical Journal Letters·DateMay 20, 2020

Invisible X-rays turn blue

Researchers at Nara Institute of Science and Technology developed a new reaction system that detects X-rays at the highest sensitivity ever recorded using organic molecules. The system can detect even the faintest X-ray levels considered dangerous, making it safer for workers exposed to radiation.

SourceNara Institute of Science and Technology·JournalChemical Science·DateFeb 7, 2020

Researchers combine X-rays and laser light to image sprays

A new laser-based method combines X-rays and laser-induced fluorescence to observe and quantify atomizing spray phenomena, providing details on the sprayed liquid's form and distribution. The technique can detect smaller amounts of liquid than previously detected with x-rays and has the potential to study sprays in real-time.

SourceOptica·JournalOptica·DateJan 30, 2020

New research provides evidence of strong early magnetic field around Earth

Scientists have discovered evidence that the magnetic field forming around Earth was even stronger 4 billion years ago, generating a protective shield from harmful solar wind and cosmic rays. This finding has implications for understanding the future sustainability of Earth's magnetic shield and its potential for supporting life.

SourceUniversity of Rochester·JournalProceedings of the National Academy of Sciences·DateJan 20, 2020

A peek at the birth of the universe

Researchers examine SKA-MPG telescope prototype for its ability to investigate cosmic background radiation with ultra precision. The study provides new insights into the origin of the Universe and explores potential applications in gravitational wave detection and dark energy research.

SourceBielefeld University·JournalMonthly Notices of the Royal Astronomical Society·DateJul 24, 2019