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Article: Possible bound nuclei beyond the two-neutron drip line in the 50≤Z≤70 region

TitlePossible bound nuclei beyond the two-neutron drip line in the 50≤Z≤70 region
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. 024331 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/10722/304572
ISSN
2020 Impact Factor: 3.296
2020 SCImago Journal Rankings: 1.679

 

DC FieldValueLanguage
dc.contributor.authorPan, C-
dc.contributor.authorZhang, KY-
dc.contributor.authorChong, PS-
dc.contributor.authorHeo, C-
dc.contributor.authorHo, MC-
dc.contributor.authorLee, J-
dc.contributor.authorLi, ZP-
dc.contributor.authorSun, W-
dc.contributor.authorTam, CK-
dc.contributor.authorWong, SH-
dc.contributor.authorYeung, RWY-
dc.contributor.authorYiu, TC-
dc.contributor.authorZhang, SQ-
dc.date.accessioned2021-09-23T09:01:59Z-
dc.date.available2021-09-23T09:01:59Z-
dc.date.issued2021-
dc.identifier.citationPhysical Review C: covering nuclear physics, 2021, v. 104 n. 2, p. article no. 024331-
dc.identifier.issn2469-9985-
dc.identifier.urihttp://hdl.handle.net/10722/304572-
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.104.024331].-
dc.titlePossible bound nuclei beyond the two-neutron drip line in the 50≤Z≤70 region-
dc.typeArticle-
dc.identifier.emailLee, J: jleehc@hku.hk-
dc.identifier.authorityLee, J=rp01902-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevC.104.024331-
dc.identifier.scopuseid_2-s2.0-85114146393-
dc.identifier.hkuros325289-
dc.identifier.volume104-
dc.identifier.issue2-
dc.identifier.spagearticle no. 024331-
dc.identifier.epagearticle no. 024331-
dc.publisher.placeUnited States-

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