The Influence of Hemispheric Solar Activity Features on the Interplanetary Plasma Parameters throughout 1967 ̶ 2017

Abstract

In this article, we have examined the possible influence of hemispheric solar activity features on the interplanetary plasma parameters. For this purpose, the daily data of sunspot areas (SSAs) and sunspot numbers (SSNs) as well as the interplanetary plasma parameters (interplanetary magnetic field (IMF) magnitude B, plasma density n, plasma velocity V, plasma temperature T, and plasma dynamic pressure P . The daily data of each interplanetary plasma parameter has been classified into two groups, northern (N) and southern (S) sorted groups based on the dominance of hemispheric SSAs or SSNs. The yearly averages of the sorted N and S groups have been calculated for each plasma parameter. The asymmetry index (N-S) for each parameter between the northern and the southern sorted group has been calculated. The asymmetry of B over the solar activity cycles is not detectable, indicating that the solar cycles are magnetically symmetric, in agreement with the findings of [1]. During the solar cycles 20, 21, and 24, the solar plasma for the southern sorted group was faster (hotter) by 20.3 km/s (15.7×10 3 o K), 13 km/s (8×10 3 o K), and 29 km/s (14.5×10 3 o K) than that for the northern sorted group, respectively. In contrast, during the solar cycle 23, the solar plasma for the southern sorted group was slower (colder) by 7.4 km/s (7.2×10 3 o K) than that for the northern sorted one.

Photoluminescence and thermoluminescence dosimetry properties of Ag/Y co‐doped ZnO nanophosphor for radiation measurements

“…The kinetic parameters describe the theoretical behavior of the experimental characterization established on three major basic factors. The activation energy (E), geometric factor μ g , and the frequency factor (S) of the trapped electron were calculated based on Equations ( 12), (13), and ( 14), respectively [51]. In this study, the peak shape model was chosen to determine the TL glow curve parameters for the proposed dosimeters.…”

“…These features make them more suitable for various sectors, such as quality control in industry, environmental dosimeters, and personal monitoring. In the latter case, they find extensive utilization in monitoring doses received via radiation workers on a routine basis, such as monthly [7,13]. However, the past studies reported a few limitations of commercial TLDs [14,15].…”