Identification of New Neutron-Rich Isotopes in the Rare-Earth Region Produced by 345 MeV/nucleon <sup>238</sup>U

Fukuda, N.; Kubo, T.; Kameda, D.; Inabe, N.; Suzuki, Hiroshi; Shimizu, Y.; Takeda, Hiroyuki; Kusaka, K.; Yanagisawa, Y.; Ohtake, M.; Tanaka, K.; Yoshida, Kôichi; Sato, Hiromi; Baba, H.; Kurokawa, M.; Ohnishi, T.; Iwasa, N.; Chiba, A.; Yamada, Teiko; Ideguchi, E.; Go, S.; Yokoyama, R.; Fujii, Toshihiko; Nıshıbata, H.; Ieki, K.; Murai, D.; Momota, S.; Nishimura, D.; Sato, Yuichi; Hwang, Jongwon; Kim, Sunji; Tarasov, O.; Morrissey, D. J.; Simpson, G. S.

doi:10.7566/jpsj.87.014202

Cited by 42 publications

(11 citation statements)

References 34 publications

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“…A huge discovery potential is provided by the predicted 6900(500) bound nuclei [1], compared with 3252 discovered to date [2,3]. In recent years, new isotopes have been mainly discovered by projectile fragmentation or fission of high intensity primary beams [4][5][6][7][8][9][10][11]. Most notably, the discovery of 60 Ca, with Z = 20 and N = 40 a doubly closed Harmonic Oscillator shell nucleus, at the RIKEN Nishina Center [12] demonstrated the power of this technique.…”

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confidence: 99%

Discovery of 68Br in secondary reactions of radioactive beams

Wimmer

Doornenbal²,

Körten³

et al. 2019

Physics Letters B

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The proton-rich isotope 68 Br was discovered in secondary fragmentation reactions of fast radioactive beams. Proton-rich secondary beams of 70,71,72 Kr and 70 Br, produced at the RIKEN Nishina Center and identified by the BigRIPS fragment separator, impinged on a secondary 9 Be target. Unambiguous particle identification behind the secondary target was achieved with the ZeroDegree spectrometer. Based on the expected direct production cross sections from neighboring isotopes, the lifetime of the ground or long-lived isomeric state of 68 Br was estimated. The results suggest that secondary fragmentation reactions, where relatively few nucleons are removed from the projectile, offer an alternative way to search for new isotopes, as these reactions populate preferentially low-lying states.

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confidence: 99%

Discovery of 68Br in secondary reactions of radioactive beams

Wimmer

Doornenbal²,

Körten³

et al. 2019

Physics Letters B

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“…Particles in the secondary beams were identified event-by-event by time-of-flight (TOF) and magnetic rigidities (Bρ), as described in ref. 35 . The intensity and purity of the 107 Pd beam was 6.0 × 10 2 particles per second (pps) and 16%, respectively.…”

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confidence: 99%

Enhancement of element production by incomplete fusion reaction with weakly bound deuteron

et al. 2019

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Searching for effective pathways for the production of proton-rich and neutron-rich isotopes is one of the main driving forces behind experimental and theoretical nuclear reaction studies as well as for practical applications in nuclear transmutation of radioactive waste. To produce nuclei effectively, an optimal combination of reaction mechanism and energy is required. We report a study on incomplete fusion induced by deuteron, which contains one proton and one neutron with a weak binding energy and is easily broken up. This reaction study was achieved by measuring directly the cross sections for both proton and deuteron for 107 Pd at 50 MeV/u via inverse kinematics technique. The results provide direct experimental evidence for the onset of a cross-section enhancement at high energy, indicating the potential for incomplete fusion induced by loosely-bound nuclei for creating proton-rich isotopes and nuclear transmutation of radioactive waste.

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“…Fukuda et al discovered 15 new nuclides in "Identification of new neutron-rich isotopes in the rare-earth region produced by 345 MeV/nucleon 238 U". 11 A 345 Table 1. New nuclides reported in 2018.…”

Section: New Discoveries In 2018mentioning

confidence: 99%

“…Leblond 30,31 2015 2019. Other than these isotopes there is only one possible candidate listed in the table: 11 O, posted on the arXiv and submitted for publication in December 2018. 25 If indeed only a few new isotopes are reported during the present year, another update of the discoveries of nuclides at the end of 2019 will not be warranted.…”

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confidence: 99%

2018 update of the discoveries of nuclides

Thoennessen

2019

Int. J. Mod. Phys. E

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Identification of New Neutron-Rich Isotopes in the Rare-Earth Region Produced by 345 MeV/nucleon ²³⁸U

Cited by 42 publications

References 34 publications

Discovery of 68Br in secondary reactions of radioactive beams

Discovery of 68Br in secondary reactions of radioactive beams

Enhancement of element production by incomplete fusion reaction with weakly bound deuteron

2018 update of the discoveries of nuclides

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Identification of New Neutron-Rich Isotopes in the Rare-Earth Region Produced by 345 MeV/nucleon 238U

Cited by 42 publications

References 34 publications

Discovery of 68Br in secondary reactions of radioactive beams

Discovery of 68Br in secondary reactions of radioactive beams

Enhancement of element production by incomplete fusion reaction with weakly bound deuteron

2018 update of the discoveries of nuclides

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Product

Resources

About

Identification of New Neutron-Rich Isotopes in the Rare-Earth Region Produced by 345 MeV/nucleon ²³⁸U