| Co-Investigator(Renkei-kenkyūsha) |
VAGINS Mark 東京大学, カブリ数物連携宇宙研究機構, 特任教授 (90509902)
TAKEUCHI Yasuo 神戸大学, 理学研究科, 教授 (60272522)
KOSHIO Yusuke 岡山大学, 自然科学研究科, 准教授 (80292960)
TAKEDA Atsushi 東京大学, 宇宙線研究所, 助教 (40401286)
SEKIYA Hiroyuki 東京大学, 宇宙線研究所, 助教 (90402768)
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| Budget Amount *help |
¥207,870,000 (Direct Cost: ¥159,900,000、Indirect Cost: ¥47,970,000)
Fiscal Year 2013: ¥13,910,000 (Direct Cost: ¥10,700,000、Indirect Cost: ¥3,210,000)
Fiscal Year 2012: ¥13,910,000 (Direct Cost: ¥10,700,000、Indirect Cost: ¥3,210,000)
Fiscal Year 2011: ¥47,060,000 (Direct Cost: ¥36,200,000、Indirect Cost: ¥10,860,000)
Fiscal Year 2010: ¥53,300,000 (Direct Cost: ¥41,000,000、Indirect Cost: ¥12,300,000)
Fiscal Year 2009: ¥79,690,000 (Direct Cost: ¥61,300,000、Indirect Cost: ¥18,390,000)
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| Research Abstract |
The purpose of this research is an R&D study for the detection of supernova relic neutrinos (SRN), which are neutrinos emitted from all past supernova bursts from the beginning of the universe. In order to detect SRN, it is necessary to dissolve gadolinium to Super-Kamiokande (SK) detector and observe positions and delayed neutrons from anti-neutrino interactions. In this research, a test tank which mimics SK was built and dissolved gadolinium. Transparency of Gd-loaded water was measured and a method to keep purify of water without removing gadolinium was developed. Also, radioactive background in gadolinium compound was measured and methods to remove the background was developed.
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