Journal
PHYSICAL REVIEW LETTERS
Volume 109, Issue 15, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.109.162501
Keywords
-
Categories
Funding
- Russian Foundation for Basic Research [11-02-12050, 11-02-12066]
- U.S. DOE Office of Nuclear Physics under DOE [DE-AC05-00OR22725]
- UT-Battelle, LLC
- LDRD Program Project, under DOE [08-ERD-030, DEAC52-07NA27344]
- Lawrence Livermore National Security, LLC
- U.S. DOE [DE-FG-05-88ER40407]
Ask authors/readers for more resources
Two years after the discovery of element 117, we undertook a second campaign using the Bk-249 + Ca-48 reaction for further investigations of the production and decay properties of the isotopes of element 117 on a larger number of events. The experiments were started in the end of April 2012 and are still under way. This Letter presents the results obtained in 1200 hours of an experimental run with the beam dose of Ca-48 of about 1.5 x 10(19) particles. The Bk-249 target was irradiated at two energies of Ca-48 that correspond to the maximum probability of the reaction channels with evaporation of three and four neutrons from the excited (297)117. In this experiment, two decay chains of (294)117 (3n) and five decay chains of (293)117 (4n) were detected. In the course of the long-term work, Cf-249-the product of decay of Bk-249 (330 d)-is being accumulated in the target. Consequently, in the present experiment, we also detected a single decay of the known isotope (294)118 that was produced during 2002-2005 in the reaction Cf-249(Ca-48, 3n)(294)118. The obtained results are compared with the data from previous experiments. The experiments are carried out in the Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, using the heavy-ion cyclotron U400.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available