A new Isotope of Z=105 with mass number 259

Citation
Hm. Fan et al., A new Isotope of Z=105 with mass number 259, HIGH EN P N, 25(6), 2001, pp. 602-606
Citations number
10
Language
CHINESE
art.tipo
Letter
Categorie Soggetti
Physics
Journal title
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
ISSN journal
0254-3052 → ACNP
Volume
25
Issue
6
Year of publication
2001
Pages
602 - 606
Database
ISI
SICI code
0254-3052(200106)25:6<602:ANIOZW>2.0.ZU;2-1
Abstract
An Isotope of element 105 with mass number 259 has been produced via the re action Am-241(Ne-22,4n) (259)Db at E-lab = 120MeV. The reaction products we re transported and collected using the helium-jet technique and rotating wh eel apparatus. The alpha -decays of the products and their daughter nuclide s were detected by a series of Si(Au) detectors. The Z and A of the nuclide have been unambiguously identified by the genetic relationship between the new activity and the known nuclide Lr-255. The new nuclide (259)Db has a h alf-life of (0.51 +/- 0.16)s and decay by alpha-particle emission with ener gy of 9.47MeV. The Q(a) value for new isotope (259)Db is in good coincidenc e with the predicted result.