Peculiarities of EPR spectra of methyl radicals in quench-condensed krypton films

• Veröffentlicht in: Физика низких температур
• Datum: 2008
• 1. Verfasser: Dmitriev, Yu.A.
• Format: Artikel
• Sprache: Englisch
• Veröffentlicht: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2008
• Schlagworte: Кpаткие сообщения
• Online Zugang: https://nasplib.isofts.kiev.ua/handle/123456789/116775
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Zitieren: Peculiarities of EPR spectra of methyl radicals in quench-condensed krypton films / Yu.A. Dmitriev // Физика низких температур. — 2008. — Т. 34, № 1. — С. 95-98. — Бібліогр.: 11 назв. — англ.

Methyl radicals are trapped in the solid Kr film by simultaneous condensation of gaseous Kr and the
 products of the gas discharge in CH₄ doped Kr on the low temperature (4.2 K) substrate located at the center
 of the microwave cavity. The observed EPR spectrum is a superposition of broad-line and narrow-line series.
 At a low resonance microwave power, the latter one consists of four hyperfine components with nearly equal
 intensities, and shows small axial anisotropy of both g- and A-tensors. At a sufficiently large power, two central
 narrow lines split so that the narrow-line series takes an appearance recorded elsewhere for CH₃ in Ar at
 higher temperatures above 12 K. Simultaneously, the intensity of two central broad lines increases dramatically
 while the outer components become saturated. The possible explanation is discussed.