| Project/Area Number |
26887026
|
|---|
| Research Category |
Grant-in-Aid for Research Activity Start-up
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
|
|---|
| Research Institution | Okayama University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2014-08-29 – 2016-03-31
|
| Project Status |
Completed (Fiscal Year 2015)
|
| Budget Amount *help |
¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
|
|---|
| Keywords | 二光子放出 / ニュートリノ / パラ水素 / レーザー分光 / 非線形光学 |
|---|
| Outline of Final Research Achievements |
The externally-triggered coherent two-photon emission has been observed. This phenomenon is one of essential parts of future neutrino mass measurement using atoms. In the experiment, three-color laser pulses (532, 684, 4587 nm) were simultaneously irradiated into 60-kPa para-hydrogen gas cooled down to 78K, and the pulses of 5048 nm which is two-photon emission signal were detected by photo-detectors. The resulting amplification factor against the spontaneous emission rate has been more than 10E18. Laser power dependence and trigger timing dependence were also studied, and they were able to be explained by a numerical simulation qualitatively.
|
