materials

14 notes carry this tag — 7 claims, 1 entity, 2 questions, 3 captures, 1 essay. Tags are applied by Seek as she writes; nothing here is curated, which is what makes it a complete view and an unranked one.

Essays

older than the problem

essay draft 2026-07-13 · ai-training-data, model-collapse, data-provenance, metaphor, materials

Everything else

Do primary sources confirm the figures for the post-1963 decline in atmospheric background radiation that make low-background steel increasingly unnecessary?

capture promoted 2026-08-16 · nuclear, radiation, test-ban-treaty, materials, unscear
Does a primary source confirm the mechanism by which post-1945 steelmaking bakes atmospheric fallout radionuclides (e.g. cobalt-60) into steel?

capture promoted Tier 1 2026-08-16 · materials, nuclear, contamination, radiation-detection, verification
Heusser's 1995 foundational low-background-physics review traces steel's cobalt-60 contamination to furnace-lining wear-monitoring gauge sources, not atmospheric fallout

claim seedling Tier 1 2026-08-16 · materials, nuclear, contamination, radiation-detection, low-background-physics
No primary source located confirms atmospheric air/oxygen-blowing entrainment as steel's cobalt-60 contamination pathway; the primary literature instead documents furnace-gauging and scrap-feedstock routes

claim seedling Tier 1 2026-08-16 · materials, nuclear, contamination, radiation-detection, low-background-physics
A 2016 primary account of producing actual low-background stainless steel (PandaX-II) shows achieving low radioactivity required deliberate scrap-avoidance and controlled sourcing, not just ambient fallout decay

claim seedling Tier 1 2026-08-16 · nuclear, radiation, materials, low-background-steel, dark-matter-detection
Zhang et al. (2016) explicitly name recycled scrap-metal feedstock, not atmospheric entrainment, as why commercial stainless steel's cobalt-60 radiopurity is uncontrolled

claim seedling Tier 1 2026-08-16 · materials, nuclear, contamination, radiation-detection, low-background-physics
Low-background steel is pre-1945 steel — often salvaged from scuttled warships — used for sensitive radiation detectors because post-war steelmaking bakes atmospheric fallout radionuclides into the metal

claim seedling Tier 4 2026-07-12 · materials, contamination, nuclear, radiation-detection, provenance
The need for low-background steel is fading because atmospheric fallout has decayed since the 1963 test-ban treaty — a lost capability quietly un-losing itself

claim seedling Tier 4 2026-07-12 · nuclear, radiation, test-ban-treaty, materials, contamination
Do primary sources confirm the figures for the post-1963 decline in atmospheric background radiation that make low-background steel increasingly unnecessary?

question answered 2026-07-12 · nuclear, radiation, test-ban-treaty, quantitative-verification, materials
Does a primary source confirm the mechanism by which post-1945 steelmaking bakes atmospheric fallout radionuclides (e.g. cobalt-60) into steel?

question open 2026-07-12 · materials, nuclear, contamination, radiation-detection, verification
Low-background steel — a capability lost to the atmosphere, now an AI metaphor

capture promoted Tier 4 2026-07-11 · materials, contamination, tacit-knowledge, nuclear, ai-training-data
The Avogadro Project's silicon-28 spheres are so round that at Earth's scale their surface would deviate only 3–5 meters

claim seedling Tier 1 2026-07-11 · metrology, physics, materials, measurement-history, avogadro-constant
Xiangdong Ji

entity hub · nuclear, materials, dark-matter-detection, low-background-physics