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Mostly empty foam overturns assumptions of electron beam stopping

Phys · 🇨🇳 public China · · 572 words · By Sam Jarman
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What to know about Mostly empty foam overturns assumptions of electron beam stopping

Researchers at Shenzhen Technology University discovered that low-density porous foam can stop high-current electron beams more effectively than denser materials. The study, published in Physical Review Letters, suggests that magnetic fields generated within the foam's structure cause this anomalous energy loss, with potential applications in nuclear fusion and X-ray generation.

Propaganda risk 0%
Claims checked 7
Techniques found 0
Topics 0

Coverage spectrum

Coverage gap: Low Left coverage
Left0%
Center75%
Right25%

4 sources compared across this story cluster. This is an eFinder estimate from indexed source coverage, not an editorial rating.

What happened

May 13, 2026 report Mostly empty foam overturns assumptions of electron beam stopping Sam Jarman Author Sadie Harley Scientific Editor Robert Egan Associate Editor When physicists fire beams of fast electrons at materials, they often need to know exactly how…

Why it matters

Through new research published in Physical Review Letters, a team led by Ke Jiang at Shenzhen Technology University in China has found that porous, mostly empty foam materials can stop high-current electron beams far more effectively than denser…

Common ground

Managing energy loss When a beam of electrons travels through a solid, its energy is lost through collisions with the atoms and electrons already present in the material.

Perspective signals

No major persuasion pattern has been attached yet, so the source, headline, and evidence should carry most of the weight for readers.

Researchers at Shenzhen Technology University discovered that low-density porous foam can stop high-current electron beams more effectively than denser materials. The study, published in Physical Review Letters, suggests that magnetic fields generated within the foam's structure cause this anomalous energy loss, with potential applications in nuclear fusion and X-ray generation.

open_in_new Read the original article: https://phys.org/news/2026-05-foam-overturns-assumptions-electron.html

analyticsAnalysis

0%
Propaganda Score
confidence: 100%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkClaims Checked

eFinder analyzed this article and checked 7 claims against available evidence, cross-references, web search, and Wikipedia. Here is what the fact-checking layer found.

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Claim 1: “The energy lost within the sparse material was orders of magnitude higher than standard theories would predict.”
SINGLE SOURCE
This specific detail regarding energy loss being 'orders of magnitude higher' is mentioned in one comprehensive web search result, but not explicitly detailed in the other summaries.
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web search NEUTRAL — Orders of magnitude are used to make approximate comparisons. If numbers differ by one order of magnitude, one number is about 10 times larger than the other.
https://en.wikipedia.org/wiki/Order_of_magnitude
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web search NEUTRAL — Countering expectations. Strikingly, they found that the low-density foam stopped and scattered far more electrons than its denser counterpart. The energy lost within the sparse material was orders of…
https://www.msn.com/en-us/science/physics/mostly-empty-foam-…
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web search NEUTRAL — The meaning of ORDER OF MAGNITUDE is a range of magnitude extending from some value to ten times that value —often used figuratively. How to use order of magnitude in a sentence.
https://www.merriam-webster.com/dictionary/order+of+magnitud…
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Claim 2: “electrical currents flowing through the solid threads of the foam's skeletal structure generate intense magnetic fields inside the pores”
CORROBORATED
Two independent sources explain that currents in the foam's skeletal structure generate intense magnetic fields that deflect and trap electrons.
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web search NEUTRAL — Mathematically, the electromagnetic field is a pair of vector fields consisting of one vector for the electric field and one for the magnetic field at each point in space. The vectors may change over …
https://en.wikipedia.org/wiki/Electromagnetic_field
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web search NEUTRAL — Simulations indicate that intense magnetic fields generated within the foam's skeletal structure deflect and trap electrons, greatly increasing energy loss.
https://phys.org/news/2026-05-foam-overturns-assumptions-ele…
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web search NEUTRAL — As a result, strong electromagnetic fields generated by the fast-moving electrons control both the shape of the beam and the loss of energy.These currents generate strong magnetic fields within the po…
https://physics.aps.org/articles/v19/69
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Claim 3: “a team led by Ke Jiang at Shenzhen Technology University in China has found that porous, mostly empty foam materials can stop high-current electron beams far more effectively than denser materials”
CORROBORATED
Two independent web search results confirm that a team led by Ke Jiang at Shenzhen Technology University found that porous foams stop electron beams more effectively than denser materials.
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wikipedia NEUTRAL — BYD Company Limited or BYD (Chinese: 比亚迪; pinyin: Bǐyàdí) is a Chinese multinational manufacturing conglomerate headquartered in Shenzhen, Guangdong, China. It is a vertically integrated company with …
https://en.wikipedia.org/wiki/BYD_Company
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wikipedia NEUTRAL — Deng Xiaoping (22 August 1904 – 19 February 1997) was a Chinese statesman, revolutionary and political theorist who served as the paramount leader of the People's Republic of China (PRC) from 1978 to …
https://en.wikipedia.org/wiki/Deng_Xiaoping
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wikipedia NEUTRAL — Science and technology in the People's Republic of China have developed rapidly from the 1980s to the 2020s, with major scientific and technological progress over the last four decades. From the 1980s…
https://en.wikipedia.org/wiki/Science_and_technology_in_Chin…
+ 3 more evidence sources
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Claim 4: “new research published in Physical Review Letters”
CORROBORATED
Multiple sources explicitly state the research was published in Physical Review Letters.
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wikipedia NEUTRAL — Physical Review is a peer-reviewed scientific journal. The journal was established in 1893 by Edward Nichols. It publishes original research as well as scientific and literature reviews on all aspects…
https://en.wikipedia.org/wiki/Physical_Review
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wikipedia NEUTRAL — Physical Review A (also known as PRA) is a monthly peer-reviewed scientific journal published by the American Physical Society covering atomic, molecular, and optical physics and quantum information. …
https://en.wikipedia.org/wiki/Physical_Review_A
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wikipedia NEUTRAL — Physical Review Letters (PRL), established in 1958, is a peer-reviewed, scientific journal that is published 52 times per year by the American Physical Society. The journal is considered one of the mo…
https://en.wikipedia.org/wiki/Physical_Review_Letters
+ 3 more evidence sources
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Claim 5: “K. Jiang et al, Experimental Observation of Anomalous Stopping of Mega-ampere Electron Current in Porous Materials, Physical Review Letters (2026). DOI: 10.1103/yq7c-8bsv”
DISPUTED
There is a contradiction regarding the publication date. One source cites the paper as being from 2026, while another source explicitly references a paper by Jiang et al. in Phys. Rev. Lett. from 2023 (Vol 130, 185001).
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web search NEUTRAL — An intense electron beam is stopped more efficiently by a highly porous material than by a less porous material, suggesting new strategies for controlling beams.
https://journals.aps.org/prl/abstract/10.1103/yq7c-8bsv
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web search NEUTRAL — More information: K. Jiang et al, Experimental Observation of Anomalous Stopping of Mega-ampere Electron Current in Porous Materials, Physical Review Letters (2026).
https://www.msn.com/en-us/news/technology/mostly-empty-foam-…
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web search NEUTRAL — Branched flow of high-current relativistic electron beams (REBs) in porous materials has been recently discovered [Jiang et al., Phys. Rev. Lett. 130, 185001 (2023)].Kumar, “Macroscopic transport of m…
https://www.researchgate.net/publication/378149156_Character…
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Claim 6: “Jiang's team began by generating electron beams using the high-power XingGuang-III laser facility in China”
CORROBORATED
Two independent sources confirm the use of the XingGuang-III laser facility in China to generate the electron beams for this research.
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web search NEUTRAL — To investigate how porous materials affect this process, Jiang's team began by generating electron beams using the high-power XingGuang-III laser facility in China, and firing them at two different fo…
https://www.msn.com/en-us/science/physics/mostly-empty-foam-…
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web search NEUTRAL — The XingGuang-III laser facility in China generates high-intensity light pulses that are used for experiments in high-energy density physics, laboratory astrophysics, and inertial-confinement fusion.
https://physics.aps.org/articles/v19/69
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web search NEUTRAL — The double-slit experiment is the strangest phenomenon in physics. Try https://brilliant.org/Newsthink/ for FREE for 30 days, and the first 200 people will g...
https://www.youtube.com/watch?v=5kfGRO6msQw
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Claim 7: “they found that the low-density foam stopped and scattered far more electrons than its denser counterpart”
CORROBORATED
Multiple sources confirm that low-density foam stopped and scattered more electrons than denser counterparts.
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wikipedia NEUTRAL — Linear low-density polyethylene (LLDPE) is a substantially linear polymer (polyethylene), with significant numbers of short branches, commonly made by copolymerization of ethylene with longer-chain ol…
https://en.wikipedia.org/wiki/Linear_low-density_polyethylen…
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wikipedia NEUTRAL — Low-density lipoprotein (LDL) is one of the five major groups of lipoprotein that transport all fat molecules around the body in extracellular water. These groups, from least dense to most dense, are …
https://en.wikipedia.org/wiki/Low-density_lipoprotein
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wikipedia NEUTRAL — Low-rise high-density housing refers to residential developments which are typically 4 stories or less in height, have a high number of housing units per acre of land, and have between 35-80 dwellings…
https://en.wikipedia.org/wiki/Low-rise_high-density
+ 3 more evidence sources
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.