| Budget Amount *help |
¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2013: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Fiscal Year 2012: ¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
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| Outline of Final Research Achievements |
Superfluid helium (He II) is an intriguing host matrix for laser spectroscopy of atoms and ions due to its characteristic properties such as transparency in the wide range of wavelength from ultraviolet to radio frequency, low temperature, and small effectiveness to spins. However, precision measurement of guest atoms and ions is usually difficult in liquid media because of interaction with surrounding atoms. In order to apply precision spectroscopy using optical pumping and double resonance method to atoms and ions in He II, we conducted experiments; introduction to He II and optical detection of ions, construction of a pulsed laser for optical pumping of atoms and ions in He II and its application to laser-microwave/radio frequency double resonance spectroscopy, utilization of ion beams produced at an accelerator facility as ion sources. We have achieved higher precision and accuracy of the double resonance measurement for atoms and ions in He II.
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