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

doi:10.1103/PhysRevC.104.L021304

	First high-precision direct determination of the atomic mass of a superheavy nuclide
	Schury, P.3; Niwase, T.1,2,3; Wada, M.3; Brionnet, P.1; Chen, S.3,15; Hashimoto, T.14; Haba, H.1; Hirayama, Y.3; Hou, D. S.11,12,13; Iimura, S.1,3,10
刊名	PHYSICAL REVIEW C
	2021-08-31
卷号	104 期号:2 页码:7
ISSN号	2469-9985
DOI	10.1103/PhysRevC.104.L021304
通讯作者	Schury, P.(schury@post.kek.jp)
英文摘要	We present the first direct measurement of the atomic mass of a superheavy nuclide. Atoms of (257)Db (Z = 105) were produced online at the RIKEN Nishina Center for Accelerator-Based Science using the fusion-evaporation reaction Pb-208(V-51, 2n)(257)Db. 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 (257)Db ions to a helium gas-filled ion stopping cell wherein they were thermalized. Thermalized (257)Db(3+) 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 (257)Db(3+) time-of-flight detection events from background by means of correlation with characteristic alpha decays. The extreme sensitivity of this technique allowed a precision atomic mass determination from 11 events. The mass excess was determined to be 100 063(231)(stat)(132)(sys) keV/c(2). 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.
资助项目	Japan Society for the Promotion of Science KAKENHI[2200823] ; Japan Society for the Promotion of Science KAKENHI[24224008] ; Japan Society for the Promotion of Science KAKENHI[24740142] ; Japan Society for the Promotion of Science KAKENHI[15H02096] ; Japan Society for the Promotion of Science KAKENHI[17H06090] ; Japan Society for the Promotion of Science KAKENHI[19K03899] ; Japan Society for the Promotion of Science KAKENHI[18H03711] ; Japan Society for the Promotion of Science KAKENHI[15K05116]
WOS关键词	DECAY PROPERTIES ; ELEMENT 115 ; PROJECTILE ; SEPARATION
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000691443200003
资助机构	Japan Society for the Promotion of Science KAKENHI
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/136387]
专题	中国科学院近代物理研究所
通讯作者	Schury, P.
作者单位	1.RIKEN Nishina Ctr Accelerator Based Sci, Wako, Saitama 3510198, Japan 2.Kyushu Univ, Dept Phys, Nishi Ku, Fukuoka 8190395, Japan 3.KEK Wako Nucl Sci Ctr, Wako, Saitama 3510198, Japan 4.Tohoku Univ, Inst Mat Res, Yoshikawa Lab, KINKEN,IMR,Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan 5.Jinan Univ, Inst Mass Spectrometer & Atmospher Environm, Guangzhou 510632, Peoples R China 6.New Mexico State Univ, Las Cruces, NM 88001 USA 7.Kyushu Univ, Res Ctr SuperHeavy Elements, Nishi Ku, Fukuoka 8190395, Japan 8.Japan Atom Energy Agcy JAEA, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan 9.Yamagata Univ, Grad Sch Sci & Engn, Yamagata, Japan 10.Osaka Univ, Dept Phys, Osaka, Japan
推荐引用方式 GB/T 7714	Schury, P.,Niwase, T.,Wada, M.,et al. First high-precision direct determination of the atomic mass of a superheavy nuclide[J]. PHYSICAL REVIEW C,2021,104(2):7.
APA	Schury, P..,Niwase, T..,Wada, M..,Brionnet, P..,Chen, S..,...&Yan, S. X..(2021).First high-precision direct determination of the atomic mass of a superheavy nuclide.PHYSICAL REVIEW C,104(2),7.
MLA	Schury, P.,et al."First high-precision direct determination of the atomic mass of a superheavy nuclide".PHYSICAL REVIEW C 104.2(2021):7.