2011 Fiscal Year Final Research Report
Measurements of nuclear-spin temperature of water molecules produced from low-temperature surface reactions
| Project/Area Number |
22840001
|
|---|
| Research Category |
Grant-in-Aid for Research Activity Start-up
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Geochemistry/Astrochemistry
|
|---|
| Research Institution | Hokkaido University |
|---|
Principal Investigator |
HAMA Tetsuya 北海道大学, 低温科学研究所, 助教 (20579172)
|
|---|
| Project Period (FY) |
2010 – 2011
|
| 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 |
|---|
| 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
|
