期刊文献+

^(229)Ra的衰变 被引量:2

THE DECAY OF 229 Ra
下载PDF
导出
摘要 用14MeV中子轰击钍靶,通过232Th(n,α)229Ra反应产生229Ra,用放射化学方法从被照靶物质中分离出229Ra。利用γ(X)谱学方法,首次观测到了能量分别为14.5,15.6,18.8,21.8,22.5,44.0,47.5,55.0,63.0,69.6,93.6,94.1,98.5,102.2,104.5,106.1,161.1,171.5keV的229Ra衰变的18条新γ射线,建立了229Ra的部分衰变纲图。 Ra is produced in the 232 Th(n,α) 229 Ra reaction using 14 MeV neutron irradiation of natural thorium. The 229 Ra activities are radiochemically separated from the irradiated target material. 18 new γ rays of 229 Ra decay with the energies of 14.5, 15.6, 18.8, 21.8, 22.5, 44.0, 47.5, 55.0, 63.0, 69.6, 93.6, 94.1, 98.5, 102.2, 104.5, 106.1, 161.1, 171.5 keV are found for the first time. A partial decay scheme of 229 Ra is proposed.
出处 《核化学与放射化学》 CAS CSCD 北大核心 1997年第4期42-46,共5页 Journal of Nuclear and Radiochemistry
基金 中国科学院八五重大项目 国家自然科学基金
关键词 镭229 符合测量 衰变纲图 Ra Coincidence measurement Decay scheme
  • 引文网络
  • 相关文献

同被引文献18

  • 1Xu Yanbing, Yuan Shuanggui, Yang Weifan, Xiao Yonghou, Pan Qiangyan and Li Yingjun.Measurement of Cross Sections for Ba Isotopes[J].IMP & HIRFL Annual Report,2001(1):34-34. 被引量:1
  • 2Berlovich E Y, Novikov Y N. Delayed nuclear fission. Phys Lett B, 1969, 29: 155-156 被引量:1
  • 3Klapdor H V, Oda T, Metzinger J. The beta strength function and the astrophysical side of the r-process. Z Phys A, 1981, 299: 213~229 被引量:1
  • 4Thielemann F K, Metzinger J, Klapdor H V. Beta delayed fission and neutron emission: consequences for the astrophysical r-process and the age of the galaxy. Z Phys A, 1983, 309: 301~317 被引量:1
  • 5Klapdor H V. Beta decay far from stability and its role in nuclear physicis and astrophysics. Fortschr Phys, 1985, 33: 1~55 被引量:1
  • 6Mezilev K A, Novikov Y N, Popov A V, et al. Search for delayed fission in neutron-rich nuclei. Z Phys A, 1990, 337: 109~109 被引量:1
  • 7Gangrskii Y P, Marinescu G M, Miller M B, et al. Delayed fission of neutron-rich protactinium isotopes. Sov J Nucl Phys, 1978, 27: 475~478 被引量:1
  • 8Bass-May A, Kratz J V, Trautmann N. Absence of delayed fission in the β-decay of 2.3 min 238Pa. Z Phys A, 1985, 322: 457-462 被引量:1
  • 9Hall H L, Gregorich K E, Henderson R A, et al. b-delayed fission from 256 mEs and the level scheme of 256Fm. Phys Rev C, 1989, 39: 1866-1875 被引量:1
  • 10Akovali Y A. Nuclear data sheets for A = 230. Nucl Data Sheets, 1993, 69: 155-208 被引量:1

引证文献2

;
使用帮助 返回顶部