Rotational States of NH^+_4 in Dilute Solution in Alkali Halide Lattices.IV.The Heat Capacity of KBr/NH_4Br(0.5mol%)at Very Low Temperatures

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概要

• 論文の詳細を見る

• Heat capacity measurements on a crystal boule of KBr/NH,(Br (0.5 mol3)have been extended down to To 0.08 K. In the region T>1.2 K, the results arein quantitative agreement with the heat capacity calculated for a "frozen-in"composition of nuclear spin symmetry species of the NHj ion corresponding toI:4.5i0.5 K. At lower temrceratures, a sr>ontaneous release of enerxv from thecrystal is observed as well as an excess heat capacity which is much larger than theprobable experimental uncertainty. Both effects can be accounted for on theassumption that the crystal contained 40 to 100 ppm of ortho -H.. It is probablethat the molecular Hz was introduced during the growth of the crystal from themelt.

• 社団法人日本物理学会の論文
• 1985-10-15

著者

• Morrison J

  Mcmaster Univ. Ontario Can

• A.MORRISON James

  Institute for Materials Research,McMaster University

• Inaba Akira

  Institute For Materials Research Mcmaster University:department Of Chemistry Faculty Of Science Osak

• A.morrison James

  Institute For Materials Research Mcmaster University

• Morrison James

  Institute for Materials Research,McMaster University

関連論文

• Rotational States of NH^+_4 in Dilute Solution in Alkali Halide Lattices.III.Calculated Energy Levels of NH^+_4 in KBr
• Rotational States of NH^+_4 in Dilute Solution in Alkali Halide Lattices.IV.The Heat Capacity of KBr/NH_4Br(0.5mol%)at Very Low Temperatures
• Molecular-weight Determination by the Vapor-pressure-Depression Method using Gas Chromatography

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