دورية أكاديمية
Possible evidence for the production of Ar $$_2^{*-}$$ 2 ∗ - metastable negative molecular ions in gaseous argon of two-phase detectors for dark matter searches
| العنوان: | Possible evidence for the production of Ar $$_2^{*-}$$ 2 ∗ - metastable negative molecular ions in gaseous argon of two-phase detectors for dark matter searches |
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| المؤلفون: | A. Buzulutskov, E. Frolov, E. Borisova, V. Nosov, V. Oleynikov, A. Sokolov |
| المصدر: | European Physical Journal C: Particles and Fields, Vol 83, Iss 10, Pp 1-4 (2023) |
| بيانات النشر: | SpringerOpen, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Astrophysics LCC:Nuclear and particle physics. Atomic energy. Radioactivity |
| مصطلحات موضوعية: | Astrophysics, QB460-466, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798 |
| الوصف: | Abstract Our recent studies of electroluminescence (EL) properties in two-phase argon detectors for dark matter searches have revealed the presence of unusual delayed pulses in the EL signal in the form of two slow components with time constants of about 5 and 50 $$\upmu \text {s}$$ μ s . These components were shown to be present in the charge signal itself, which clearly indicates that drifting electrons are temporarily trapped on two states of metastable negative argon ions which have never been observed before. In this work, using the pressure dependence of the ratio of slow component contributions measured in experiment, it is deduced that these states are those of two types of metastable negative molecular ions, $${{\textrm{Ar}}}_2^{*-}(b \ ^4\varSigma _u^-)$$ Ar 2 ∗ - ( b 4 Σ u - ) and $${{\textrm{Ar}}}_2^{*-}(a \ ^4\varSigma _g^+)$$ Ar 2 ∗ - ( a 4 Σ g + ) for the higher and lower energy level respectively. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1434-6052 13842889 |
| العلاقة: | https://doaj.org/toc/1434-6052Test |
| DOI: | 10.1140/epjc/s10052-023-12088-4 |
| الوصول الحر: | https://doaj.org/article/6ebf8673a1384288908437e611cdcdb7Test |
| رقم الانضمام: | edsdoj.6ebf8673a1384288908437e611cdcdb7 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 14346052 13842889 |
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| DOI: | 10.1140/epjc/s10052-023-12088-4 |