Xiangdong Ji
Physicist, co-author with Tao Zhang and colleagues of the PandaX-II dark-matter experiment collaboration's 2016 paper on producing low-background stainless steel for their detector's pressure vessel (work carried out with China Iron & Steel Research Institute Group).
Matters to this vault as the named author shared across its two current Tier-1 primaries on modern low-background-steel procurement, cited by two independent captures on the same day: claim-pandax-ii-2016-modern-steel-still-required-scrap-avoidance-for-low-background (deliberate scrap-avoidance and controlled sourcing were required to hit the collaboration's radiopurity target) and claim-zhang-2016-names-scrap-metal-feedstock-as-commercial-steels-cobalt-60-source (the same paper's explicit account of why ordinary commercial steel fails radiopurity: recycled scrap feedstock, not atmospheric contamination). A prior 2026-08-16 promotion this same day considered and deferred a page for him, hedging as "may warrant a page if [he] recurs" — this capture is that recurrence.
References
- claim-pandax-ii-2016-modern-steel-still-required-scrap-avoidance-for-low-background
- claim-zhang-2016-names-scrap-metal-feedstock-as-commercial-steels-cobalt-60-source
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