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Article: First high-precision direct determination of the atomic mass of a superheavy nuclide

TitleFirst high-precision direct determination of the atomic mass of a superheavy nuclide
Authors
Issue Date2021
PublisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/prc/
Citation
Physical Review C: covering nuclear physics, 2021, v. 104 n. 2, p. article no. L021304 How to Cite?
AbstractWe present the first direct measurement of the atomic mass of a superheavy nuclide. Atoms of Db257 (Z=105) were produced online at the RIKEN Nishina Center for Accelerator-Based Science using the fusion-evaporation reaction Pb208(V51, 2n)Db257. The gas-filled recoil ion separator GARIS-II was used to suppress both the unreacted primary beam and some transfer products, prior to delivering the energetic beam of Db257 ions to a helium gas-filled ion stopping cell wherein they were thermalized. Thermalized Db3+257 ions were then transferred to a multireflection time-of-flight mass spectrograph for mass analysis. An alpha particle detector embedded in the ion time-of-flight detector allowed disambiguation of the rare Db3+257 time-of-flight detection events from background by means of correlation with characteristic α decays. The extreme sensitivity of this technique allowed a precision atomic mass determination from 11 events. The mass excess was determined to be 100063(231)stat(132)syskeV/c2. Comparing to several mass models, we show the technique can be used to unambiguously determine the atomic number as Z=105 and should allow similar evaluations for heavier species in future work. © 2021 American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/304279
ISSN
2023 Impact Factor: 3.2
2023 SCImago Journal Rankings: 1.223
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorSchury, P-
dc.contributor.authorNiwase, T-
dc.contributor.authorWada, M-
dc.contributor.authorBrionnet, P-
dc.contributor.authorChen, S-
dc.contributor.authorHashimoto, T-
dc.contributor.authorHaba, H-
dc.contributor.authorHirayama, Y-
dc.contributor.authorHou, DS-
dc.contributor.authorIimura, S-
dc.contributor.authorIshiyama, H-
dc.contributor.authorIshizawa, S-
dc.contributor.authorIto, Y-
dc.contributor.authorKaji, D-
dc.contributor.authorKimura, S-
dc.contributor.authorKoura, H-
dc.contributor.authorLiu, JJ-
dc.contributor.authorMiyatake, H-
dc.contributor.authorMoon, JY-
dc.contributor.authorMorimoto, K-
dc.contributor.authorMorita, K-
dc.contributor.authorNagae, D-
dc.contributor.authorRosenbusch, M-
dc.contributor.authorTakamine, A-
dc.contributor.authorWatanabe, YX-
dc.contributor.authorWollnik, H-
dc.contributor.authorXIAN, W-
dc.contributor.authorYan, SX-
dc.date.accessioned2021-09-23T08:57:47Z-
dc.date.available2021-09-23T08:57:47Z-
dc.date.issued2021-
dc.identifier.citationPhysical Review C: covering nuclear physics, 2021, v. 104 n. 2, p. article no. L021304-
dc.identifier.issn2469-9985-
dc.identifier.urihttp://hdl.handle.net/10722/304279-
dc.description.abstractWe present the first direct measurement of the atomic mass of a superheavy nuclide. Atoms of Db257 (Z=105) were produced online at the RIKEN Nishina Center for Accelerator-Based Science using the fusion-evaporation reaction Pb208(V51, 2n)Db257. The gas-filled recoil ion separator GARIS-II was used to suppress both the unreacted primary beam and some transfer products, prior to delivering the energetic beam of Db257 ions to a helium gas-filled ion stopping cell wherein they were thermalized. Thermalized Db3+257 ions were then transferred to a multireflection time-of-flight mass spectrograph for mass analysis. An alpha particle detector embedded in the ion time-of-flight detector allowed disambiguation of the rare Db3+257 time-of-flight detection events from background by means of correlation with characteristic α decays. The extreme sensitivity of this technique allowed a precision atomic mass determination from 11 events. The mass excess was determined to be 100063(231)stat(132)syskeV/c2. Comparing to several mass models, we show the technique can be used to unambiguously determine the atomic number as Z=105 and should allow similar evaluations for heavier species in future work. © 2021 American Physical Society.-
dc.languageeng-
dc.publisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/prc/-
dc.relation.ispartofPhysical Review C: covering nuclear physics-
dc.rightsCopyright [2021] by The American Physical Society. This article is available online at [http://dx.doi.org/10.1103/PhysRevC.104.L021304].-
dc.titleFirst high-precision direct determination of the atomic mass of a superheavy nuclide-
dc.typeArticle-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevC.104.L021304-
dc.identifier.scopuseid_2-s2.0-85114150235-
dc.identifier.hkuros325231-
dc.identifier.volume104-
dc.identifier.issue2-
dc.identifier.spagearticle no. L021304-
dc.identifier.epagearticle no. L021304-
dc.identifier.isiWOS:000691443200003-
dc.publisher.placeUnited States-

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