A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Applying machine learning methods for the analysis of two-dimensional mass spectra (2023)

Gao, Z., Solders, A., Al-Adili, A., Beliuskina, O., Eronen, T., Kankainen, A., Lantz, M., Moore, I. D., Nesterenko, D. A., Penttilä, H., Pomp, S., Sjöstrand, H., the IGISOL team. (2023). Applying machine learning methods for the analysis of two-dimensional mass spectra. European Physical Journal A, 59, Article 169. https://doi.org/10.1140/epja/s10050-023-01080-x

JYU-tekijät tai -toimittajat

Beliuskina, Olga
Eronen, Tommi
Kankainen, Anu
Moore, Iain
Nesterenko, Dmitrii
Penttilä, Heikki

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Gao, Z.; Solders, A.; Al-Adili, A.; Beliuskina, O.; Eronen, T.; Kankainen, A.; Lantz, M.; Moore, I. D.; Nesterenko, D. A.; Penttilä, H.; et al.

Lehti tai sarja: European Physical Journal A

ISSN: 1434-6001

eISSN: 1434-601X

Julkaisuvuosi: 2023

Ilmestymispäivä: 25.07.2023

Volyymi: 59

Artikkelinumero: 169

Kustantaja: Springer

Julkaisumaa: Saksa

Julkaisun kieli: englanti

DOI: https://doi.org/10.1140/epja/s10050-023-01080-x

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/88890

Tiivistelmä

In a measurement of isomeric yield-ratios in fission, the Phase-Imaging Ion-Cyclotron-Resonance technique, which projects the radial motions of ions in the Penning trap (JYFLTRAP) onto a position-sensitive micro-channel plate detector, has been applied. To obtain the yield ratio, that is the relative population of two states of an isomer pair, a novel analysis procedure has been developed to determine the number of detected ions in each state, as well as corrections for the detector efficiency and decay losses. In order to determine the population of the states in cases where their mass difference is too small to reach full separation, a Bayesian Gaussian Mixture model was implemented. The position-dependent efficiency of the micro-channel plate detector was calibrated by mapping it with 133133Cs++ ions, and a Gaussian Process was trained with the position data to construct an efficiency function that could be used to correct the recorded distributions. The obtained numbers of counts of excited and ground-state ions were used to derive the isomeric yield ratio, taking into account decay losses as well as feeding from precursors.

YSO-asiasanat: ydinfysiikka; koneoppiminen; massa (fysiikka); fissio; tutkimuslaitteet