Evidence map›Paper›PMID 42039736›Full record

ArticleMetrologia2025

Primary activity measurement of an Am-241 solution using microgram inkjet gravimetry and decay energy spectrometry.

Ryan P Fitzgerald, Bradley K Alpert, Denis E Bergeron, Max Carlson, Richard Essex, Sean Jollota, Kelsey Morgan, Shin Muramoto, Svetlana Nour, Galen O'Neil and 4 more

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Metrologia, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

14 authors.

Ryan P FitzgeraldNational Institute of Standards and Technology, Gaithersburg, MD 20899, United States of America.
Bradley K AlpertNational Institute of Standards and Technology, Boulder, CO 80305, United States of America.
Denis E BergeronNational Institute of Standards and Technology, Gaithersburg, MD 20899, United States of America.
Max CarlsonNational Institute of Standards and Technology, Gaithersburg, MD 20899, United States of America.
Richard EssexNational Institute of Standards and Technology, Gaithersburg, MD 20899, United States of America.
Sean JollotaNational Institute of Standards and Technology, Gaithersburg, MD 20899, United States of America.
Kelsey MorganNational Institute of Standards and Technology, Boulder, CO 80305, United States of America.
Shin MuramotoNational Institute of Standards and Technology, Gaithersburg, MD 20899, United States of America.
Svetlana NourNational Institute of Standards and Technology, Gaithersburg, MD 20899, United States of America.
Galen O'NeilNational Institute of Standards and Technology, Gaithersburg, MD 20899, United States of America.
Daniel R SchmidtNational Institute of Standards and Technology, Boulder, CO 80305, United States of America.
Gordon ShawNational Institute of Standards and Technology, Gaithersburg, MD 20899, United States of America.
Daniel SwetzNational Institute of Standards and Technology, Boulder, CO 80305, United States of America.
R Michael VerkouterenNational Institute of Standards and Technology, Gaithersburg, MD 20899, United States of America.

Funding

Intramural NIST DOC 9999-NIST
6 · The paper itself

Abstract

We demonstrate a method for radionuclide assay that is spectroscopic with 100 % counting efficiency for alpha decay. Advancing both cryogenic decay energy spectrometry (DES) and drop-on-demand inkjet metrology, a solution of Am-241 was assayed for massic activity (of order 100 kBq/g) with a relative combined standard uncertainty less than 1 %. We implement live-timed counting, spectroscopic analysis, validation by liquid scintillation (LS) counting, and confirmation of quantitative solution transfer. Experimental DES spectra are well modeled with a Monte Carlo simulation. The model was further used to simulate Pu-238 and Pu-240 impurities, calculate detection limits, and demonstrate the potential for tracer-free multi-nuclide analysis, which will be valuable for new cancer therapeutics based on decay chains, Standard Reference Materials (SRMs) containing impurities, and more widely in nuclear energy, environmental monitoring, security, and forensics.

Indexed as

cryogenic calorimetrydecay energy spectrometryinkjet gravimetryquantitative analysisradioactivityradionuclide metrologyTEStransition edge sensor

Identifiers

PMID42039736
PMCPMC13108511

What OpenQuestion holds

Textmetadata
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.