EPR spectra and rotation of CH3, CH2D, CHD2, and CD3 radicals in solid H2

Автор(и)

  • Yu.A. Dmitriev A.F. Ioffe Physico-Technical Institute, 26 Politekhnicheskaya Str, St. Petersburg 194021, Russia
  • R.A. Zhitnikov A.F. Ioffe Physico-Technical Institute, 26 Politekhnicheskaya Str, St. Petersburg 194021, Russia

DOI (Low Temperature Physics):


https://doi.org/10.1063/1.1582334

Ключові слова:

PACS: 32.30.-r, 76.30.-v

Анотація

EPR spectra of CH3, CH2D, CHD2, and CD3 radicals have been observed in H2 matrix in the temperature range 1.6-4.2 K. The radicals were obtained by condensation on a cold substrate of two gas flows: deuterium mixed with 2 mol % methane passed through a discharge and pure hydrogen avoiding the discharge. The CD3 and CHD2 spectra were found to be a superposition of two spectra: high-temperature and low-temperature. A transformation of the shape of CD3 and CHD2 spectrum with decreasing sample temperature was observed. This is attributed to a change in the populations of the lowest rotational states of the radicals. Compared to known results for deuterated methyl radicals in Ar, the present observations suggest an existence of a hindering barrier for the radical rotation in solid H2.

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Опубліковано

2003-05-16

Як цитувати

(1)
Yu.A. Dmitriev and R.A. Zhitnikov, EPR spectra and rotation of CH3, CH2D, CHD2, and CD3 radicals in solid H2, Low Temp. Phys. 29, (2003) [Fiz. Nizk. Temp. 29, 695-698, (2003)] DOI: https://doi.org/10.1063/1.1582334.

Номер

Том 29 № 6 (2003)

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