Highly selective cryogenic reactions in solid hydrogen on pseudo cosmic dust surface
Project/Area Number |
23600005
|
Research Category |
Grant-in-Aid for Scientific Research (C)
|
Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Quantum beam science
|
Research Institution | Nagoya University |
Principal Investigator |
KUMAGAI Jun 名古屋大学, エコトピア科学研究所, 准教授 (20303662)
|
Project Period (FY) |
2011 – 2013
|
Project Status |
Completed (Fiscal Year 2013)
|
Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
|
Keywords | solid parahydrogen / radical-radical reaction / cosmic dust / tunneling / distortion of lattice / ionizing radiation / electron spin resonance / ラジカル―ラジカル反応 / 原子トンネル反応 / 疑似星間塵 / トンネル拡散 / H原子 / パラ水素 / 極低温反応 / H6+水素分子イオン / Vacancy / 量子拡散 / 高選択的ラジカル-ラジカル反応 / 疑似星間塵表面 / 極低温化学反応 / 固体水素 / 電子スピン共鳴法 / 紫外線 / 放射線 |
Research Abstract |
As a model of cosmic dust for bio-molecular growth in dark nebula at cryogenic temperature, a mixture of silica gel with solid parahydrogen was used for deterring the reactions of H atoms and other radicals at 4.2 K. We found that H atoms and methyl radicals never react in solid parahydrogen even though H atoms were diffused in solid parahydrogen. H atoms also did not react with TEMPO radicals adsorbed on the silica gels. H atoms can diffuse in solid parahydrogen only by tunneling reaction of H abstraction reaction. Solute molecules as methyl radicals or silica gels may distort the lattice structure of solid parahydrogen, to make difficult for diffusion of H atoms by the tunneling. This can be the main reason why such radical-radical reactions could not take place at 4.2 K.
|
Report
(4 results)
Research Products
(4 results)