2010 Fiscal Year Final Research Report
Isotope Shift Measurements of Samarium Muonic Atom X-rays in Thin Solid Deuterium Films
| Project/Area Number |
20340062
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | High Energy Accelerator Research Organization |
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Principal Investigator |
STRASSER Patrick High Energy Accelerator Research Organization, 物質構造科学研究所, 研究機関講師 (20342834)
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| Co-Investigator(Renkei-kenkyūsha) |
TANIGUCHI Akihiro 京都大学, 原子炉実験所, 准教授 (10273533)
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| Project Period (FY) |
2008 – 2010
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| Keywords | ミュオン / 固体水素 / イオン源 / ミュオンX線 / イオン注入 / 希土類元素 / サマリウム |
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| Research Abstract |
In this research, we proposed to implant stable samarium isotopes in thin solid hydrogen films to form muonic atoms through the direct muon transfer reaction, and then conduct muonic X-ray spectroscopy with those implanted ions to determine isotope shifts and transfer rates. The isotope shift of muonic atom X-rays measures the nuclear charge distribution of the nucleus, and samarium isotopes are of particular interest because they show very abrupt changes in their nuclear characteristics. This development is crucial in order to expand the solid hydrogen film method to produce muonic atoms with unstable nuclei in the future. Very promising results were obtained at the RIKEN-RAL muon facility with stable samarium isotopes ^<148>Sm and ^<152>Sm of about 1 ppm implanted into a thin solid deuterium film. Clear X-rays peaks from the 2p→1s muonic transitions in samarium (about 4.5MeV) were observed, and the isotope shift was consistent with that ^<148>Sm still has a spherical nucleus, while the nucleus of ^<152>Sm is highly deformed.
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[Journal Article] J-PARC decay muon channel construction status2010
Author(s)
P.Strasser, K.Shimomura, A.Koda, N.Kawamura, H.Fujimori, S.Makimura, Y.Kobayashi, K.Nakahara, M.Kato, S.Takeshita, M.Hiraishi, M.Miyazaki, W.Higemoto, T.U.Ito, K.Ninomiya, K.Ishida, M.K.Kubo, R.Kadono, K.Nishiyama, Y.Miyake
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Journal Title
Journal of Physics : Conference Series 225
Pages: 012050[1-8]
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