| Project/Area Number |
20340157
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Geochemistry/Astrochemistry
|
|---|
| Research Institution | Kyushu University |
|---|
Principal Investigator |
NARAOKA Hiroshi Kyushu University, 大学院・理学研究院, 教授 (20198386)
|
|---|
| Co-Investigator(Renkei-kenkyūsha) |
POULSON SIMON 米国ネバダ大学リノ校, 地球科学科, 教授
|
|---|
| Research Collaborator |
MORIWAKI Emi 九州大学, 大学院・理学研究府・地球惑星科学専攻, 修士課程学生
|
|---|
| Project Period (FY) |
2008 – 2010
|
| Project Status |
Completed (Fiscal Year 2010)
|
| Budget Amount *help |
¥18,850,000 (Direct Cost: ¥14,500,000、Indirect Cost: ¥4,350,000)
Fiscal Year 2010: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2009: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2008: ¥13,000,000 (Direct Cost: ¥10,000,000、Indirect Cost: ¥3,000,000)
|
|---|
| Keywords | イオウ同位体 / 質量非依存同位体分別 / 光化学反応 / 紫外吸収スペクトル / 始生代堆積岩 / 大気進化 / イオウ / 始生代 / 黒色頁岩 / 化学形態 / 南極氷床 / 硫酸塩 / 同位体分別 / 質量非依存 / イオウ化合物 / 光反応 / 酸素同位体 / 二酸化イオウ / アイソトポマー |
|---|
| Research Abstract |
To investigate the interaction between UV photolysis of SO_2 and mass-independent isotope fractionation of sulfur (MIF-S) signatures, absorption cross sections of all S-substituted SO_2 isotopologues (^<32>SO_2, ^<33>SO_2, ^<34>SO_2, and ^<36>SO_2) were determined between 183 and 330 nm in every 0.05 nm using a double-beam spectrometer. The cross sections of SO_2 are very different for the four isotopologues from 183 to 230 nm. The MIF-S signature of SO_2 by irradiation using a 193 nm ArF laser is well explained by different photolysis rate of SO_2 using a kinetic model depending on cross section of each isotopologue. Absorption cross sections of O-substituted SO_2 isotopologues (^<32>S^<16>O^<18>O, ^<32>S^<18>O_2 ; ^<34>S^<16>O^<18>O,^<34>S^<18>O_2) were also estimated to clarify oxygen isotope variations associated with SO_2 photolysis.
|
