کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1764686 1020068 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Collisional line broadening versus collisional depolarization: Similarities and differences
ترجمه فارسی عنوان
گسترش خط لرزه در برابر قطبی شدن قطعی: شباهت ها و تفاوت ها
کلمات کلیدی
خط مخرب گسترش می یابد، قطبش اتمی، دفولاریزه متلاشی شده
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم فضا و نجوم
چکیده انگلیسی

Within the impact approximation, collisional line broadening parameters and depolarizing and polarization transfer (population, orientation, alignment transfer) rates are complementary: both include the effect of collisional transitions between the Zeeman sublevels of a given level, or between fine or hyperfine structure levels of a given term. However, there are several differences: in line broadening, the two levels connected by the radiative transition contribute to the broadening, and there is also an interference term between these two levels, whereas only one level or two close levels are concerned in the depolarization. Another difference lies in the fact that purely elastic collisions contribute also to the line broadening, whereas they do not contribute to the depolarization. The nature of these two kinds of coefficients are recalled. Then the possibility to find some relationships or systematic trends concerning depolarization versus collisional broadening is considered. This is to answer some current questions which come from the polarization community.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Advances in Space Research - Volume 54, Issue 7, 1 October 2014, Pages 1164–1172
نویسندگان
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