Measurements of nuclear-spin temperature of water molecules produced from low-temperature surface reactions
| Project/Area Number |
22840001
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Geochemistry/Astrochemistry
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| Research Institution | Hokkaido University |
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Principal Investigator |
HAMA Tetsuya 北海道大学, 低温科学研究所, 助教 (20579172)
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| Project Period (FY) |
2010 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2011: ¥1,495,000 (Direct Cost: ¥1,150,000、Indirect Cost: ¥345,000)
Fiscal Year 2010: ¥1,625,000 (Direct Cost: ¥1,250,000、Indirect Cost: ¥375,000)
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| Keywords | 彗星 / 星間分子雲 / アモルファス氷 / 表面 / 低温 / 原子反応 / 原子核スピン温度 / 原子核 / 低温固体表面温度 |
|---|
| Research Abstract |
The present study reports measurements of nuclear-spin temperatures of thermally desorbed H_2O molecules from amorphous solid water(ASW) by combining temperature-programmed desorption and resonance-enhanced multiphoton ionization. The nuclear-spin temperature of thermally desorbed H_2O molecules from ASW prepared at 8K was almost at the statistical high-temperature limit. This result suggests that the nuclear-spin temperatures of gaseous H_2O molecules thermally desorbed from comets do not necessarily reflect the surface temperature at which H_2O molecules condensed or formed
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Report
(3 results)
Research Products
(52 results)
