The LLNL rabbit: determination of trace element levels in polyethylene

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发表日期：

2024年7月5日

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Aaron S. Tamashiro,
Jason T. Harke,
Jeremias G. Duarte,
Yonatan Mishnayot,
Scott Menn,
Steven Reese,
Steve Smith,
Leah D. Minc,
Walter Loveland,
Robert Schickler,
Camille J. Palmer

摘要

Rabbit facilities are systems that pneumatically transport a sample carrier (known as a rabbit) to and from a radiation source. However, trace impurities in the polyethylene (PE) rabbit may interfere with measurements of short-lived isotopes. Activated impurities with short half-lives as ²⁸Al interfere with the fission product γ-ray, therefore the rabbit cannot be measured immediately. Neutron activation analysis was performed on various PE samples obtained from different manufacturers and the highest quality PE was used to fabricate a high-purity PE rabbit. The impurities identified in the PE study were ²⁷Al, ⁴⁸Ca, ³⁷Cl, ⁵⁰Cr, ⁶⁵Cu, ¹²⁷I, ²⁶Mg, ⁵⁵Mn, and ³⁰Si.