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Journal Articles

First online operation of TRIGA-TRAP

Grund, J.*; Asai, Masato; Blaum, K.*; Block, M.*; Chenmarev, S.*; D$"u$llmann, Ch. E.*; Eberhardt, K.*; Lohse, S.*; Nagame, Yuichiro*; Nagy, Sz.*; et al.

Nuclear Instruments and Methods in Physics Research A, 972, p.164013_1 - 164013_8, 2020/08

 Times Cited Count:6 Percentile:59.94(Instruments & Instrumentation)

We report on the successful coupling of the Penning-trap mass spectrometry setup TRIGA-TRAP to the research reactor TRIGA Mainz. This offers the possibility to perform direct high-precision mass measurements of short-lived nuclei produced in neutron-induced fission of a $$^{235}$$U target located near the reactor core. An aerosol-based gas-jet system is used for efficient transport of short-lived neutron-rich nuclei from the target chamber to a surface ion source. In conjunction with new ion optics and extended beam monitoring capabilities, the experimental setup has been fully commissioned. The design of the surface ion source, efficiency studies and first results are presented.

Journal Articles

On-site measurement of nuclear material by using the fast neutron direct interrogation method

Komeda, Masao

Bunseki, 2019(10), p.459 - 461, 2019/10

no abstracts in English

Oral presentation

Development of a vane-shaped electrode Paul trap for decay spectroscopy of trapped radioactive ions

Uchibaba, Yuta; Ito, Yuta; Sato, Tetsuya; Aoki, Ryota; Asai, Masato; Gong, G.; Miyachi, Yuta*; Nagame, Yuichiro*; Natori, Hina*; Tsukada, Kazuaki

no journal, , 

In anticipation of precise mass measurement of superheavy nuclei with an atomic number of 104 or more, we are developing an ion trap for the purpose of improving the accuracy of mass determination by prior identification of ions to be measured by decay spectroscopy and correlation with decay information. In order to capture radiation from trapped unstable nuclear ions at a large solid angle, we have developed a vane electrode type ion trap using a thin plate-like vane electrode. As an indication of performance, the trap lifetime and accumulated charge were evaluated in comparison with a circular electrode type ion trap.

Oral presentation

In-trap decay measurements of $$^{214}$$Ra$$^{2+}$$ ions for decay-recoil-correlated spectroscopy

Uchibaba, Yuta; Ito, Yuta; Sato, Tetsuya; Aoki, Ryota; Asai, Masato; Gong, G.; Tsukada, Kazuaki; Natori, Hina; Miyachi, Yuta; Nagame, Yuichiro*

no journal, , 

We have developed a Paul trap with an advanced electrode structure that allows for the detection of radiation and decay recoils over a large solid angle, aiming to perform identifications of radioactive ions by decay spectroscopy and precision mass spectroscopy combined with decay correlation. In order to measure the correlation between radiations and decay recoils from ions stored in the trap, we tested the performance of a semiconductor detector in the vicinity of radio-frequency electrodes and demonstrated in-trap decay measurements using $$^{214}$$Ra$$^{2+}$$ ions.

Oral presentation

In-trap decay measurements of $$^{214}$$Ra$$^{2+}$$ ions for decay-recoil-correlated spectroscopy

Uchibaba, Yuta; Ito, Yuta; Sato, Tetsuya; Aoki, Ryota; Asai, Masato; Gong, G.; Tsukada, Kazuaki; Natori, Hina; Miyachi, Yuta; Nagame, Yuichiro*

no journal, , 

We have developed a Paul trap with an advanced electrode structure that allows for the detection of radiation and decay recoils over a large solid angle, aiming to perform identifications of radioactive ions by decay spectroscopy and precision mass spectroscopy combined with decay correlation. In order to measure the correlation between radiations and decay recoils from ions stored in the trap, we tested the performance of a semiconductor detector in the vicinity of radio-frequency electrodes and demonstrated in-trap decay measurements using $$^{214}$$Ra$$^{2+}$$ ions.

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