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Possible evidence for the production of Ar 2∗- metastable negative molecular ions in gaseous argon of two-phase detectors for dark matter searches. / Buzulutskov, A.; Frolov, E.; Borisova, E. и др.
в: European Physical Journal C, Том 83, № 10, 899, 10.2023.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Possible evidence for the production of Ar 2∗- metastable negative molecular ions in gaseous argon of two-phase detectors for dark matter searches
AU - Buzulutskov, A.
AU - Frolov, E.
AU - Borisova, E.
AU - Nosov, V.
AU - Oleynikov, V.
AU - Sokolov, A.
N1 - This work was supported in part by Russian Science Foundation (Project no. 20-12-00008, https://rscf.ru/project/20-12-00008/ ).
PY - 2023/10
Y1 - 2023/10
N2 - 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 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, Ar2∗-(b4Σu-) and Ar2∗-(a4Σg+) for the higher and lower energy level respectively.
AB - 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 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, Ar2∗-(b4Σu-) and Ar2∗-(a4Σg+) for the higher and lower energy level respectively.
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85173556819&origin=inward&txGid=f9031899d028d42778f70ecf10dc00b9
UR - https://www.mendeley.com/catalogue/c63299b6-2ede-383c-b2e2-f40c764eec27/
U2 - 10.1140/epjc/s10052-023-12088-4
DO - 10.1140/epjc/s10052-023-12088-4
M3 - Article
VL - 83
JO - European Physical Journal C
JF - European Physical Journal C
SN - 1434-6044
IS - 10
M1 - 899
ER -
ID: 59281272