| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2001: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 2000: ¥3,500,000 (Direct Cost: ¥3,500,000)
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| Research Abstract |
The most important purpose of this research is developing of an experimental technique to identify the correlation between an intermediate state and following fragmentation processes in collisions between highly charged ion and molecule. In order to investigate fragmentation processes induced by electron transfer between ion and molecule, it is necessary to specify an intermediate state of molecule produced just after the collision. No information about the intermediate state, however, had been obtained because only charge-state change of incident ion had been selected until now. In this research, we developed a hew spectroscopic device which is able to measure not only charge-state change but also kinetic energy change in coincidence with 3D-momentum image of fragment ions. This research also includes development of a compact ion source producing highly charged ions without any cooling system.
In the first term of this project (2000), a compact multiply-charged ion source was developed
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, and a related paper was published. The size of the ion source is very small (40 cm long and 20 cm diameter) and the power consumption is very low (4 W). Extraction of Ne^<10+>, Ar^<18+>, and Kr^<29+> was succeeded from the ion source by using a pair of NdFeB permanent magnets and special shaped yokes.
In the last term of this project (2001), the SD-momentum imaging analyzer was developed. We participated in some conferences and published the proceedings. It is possible to measure not only charge-state change but also kinetic energy change in coincidence with SD-momentum image of fragment ions by using this analyzer. This device makes it possible to assign both electronic states of incident ion and target molecule just after the electron transfer collision. It was possible to specify the electronic states of molecules in collisions between Ar^<q+> (q=3, 8, 9, 11, and 12) and N_2, CH_4, and CF_4 molecules for the first time. In addition, some information on molecular orientation and asymmetry of fragmentation were obtained from the results. Less
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