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RISS 인기검색어
- 검색키워드
- 저자 : Taro Hayakawa (검색결과 2 건)
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ESR Study on Molecular Salt (Benzo-TTFVS)2MBr4 (M = Fe, Ga)
Shuichi Kawamata,Takekazu Ishida,Taro Hayakawa,Takashi Hiraoka,Hideki Fujiwara,Toyonari Sugimoto 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.2
Electron spin resonance (ESR) experiments on (Benzo-TTFVS)2MBr4 (M = Fe, Ga) have been done with 15.4 GHz microwaves, where Benzo-TTFVS denotes a new donor molecule substituted with a benzo group, benzotetrathiafulvalenothioquinone-1,3-dithiolemethide. The temperature and the magnetic-field-direction dependencies of the effective g-value and the linewidth are obtained. In (Benzo-TTFVS)2GaBr4 (Ga salt), the ESR signals are due to π-electrons while they originate from d-electrons at the Fe3+ ion in the case of (Benzo-TTFVS)2FeBr4 (Fe salt). The g-value and the linewidth for the direction of the π-d correlation are dierent from those for other directions in the Fe salt. A strong antiferromagnetic fluctuation related to the π-d correlation is observed in the Fe salt. On the other hand, in the Ga salt, the magnetic-eld-direction dependencies of the g-value and the linewidth re ect the anisotropy of the one-dimensional conduction band. The importance of the π-d correlation is proved by comparing the ESR results for the Fe salt with those for the Ga salt. Electron spin resonance (ESR) experiments on (Benzo-TTFVS)2MBr4 (M = Fe, Ga) have been done with 15.4 GHz microwaves, where Benzo-TTFVS denotes a new donor molecule substituted with a benzo group, benzotetrathiafulvalenothioquinone-1,3-dithiolemethide. The temperature and the magnetic-field-direction dependencies of the effective g-value and the linewidth are obtained. In (Benzo-TTFVS)2GaBr4 (Ga salt), the ESR signals are due to π-electrons while they originate from d-electrons at the Fe3+ ion in the case of (Benzo-TTFVS)2FeBr4 (Fe salt). The g-value and the linewidth for the direction of the π-d correlation are dierent from those for other directions in the Fe salt. A strong antiferromagnetic fluctuation related to the π-d correlation is observed in the Fe salt. On the other hand, in the Ga salt, the magnetic-eld-direction dependencies of the g-value and the linewidth re ect the anisotropy of the one-dimensional conduction band. The importance of the π-d correlation is proved by comparing the ESR results for the Fe salt with those for the Ga salt.
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Development and Performance Test of the Analysis Software for the CRIB Active Target
이필수,이춘식,문준영,채경육,차수미,Hidetoshi Yamaguchi,Taro Nakao,David M. Kahl,Shigeru Kubono,Silvio Cherubini,Seiya Hayakawa,Cosimo Signorini 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.3
Software for genuinely event-by-event analysis and event reconstruction of data obtained by usingan active target has been developed in the graphical user interface under the CERN ROOT framework. The primary motivation for developing the software was to provide physicists who performexperiments using an active target a more user-friendly environment for the purpose of investigatingthe performance of detection systems and obtaining ideas about physics from a large amount ofexperimental data. To test the performance of the software, we analyzed experimental data froma 16N radioactive ion beam experiment for α-decay measurements. As a result of the analysis, weobserved the Bragg curve and measured the range of the 16N RI beam in the detector. Data werecalibrated against the calculation after comparing the Bragg curve to the one obtained from anenergy loss calculation in P-10 gas. We present a detailed description of the analysis software andits test results.
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