The gamma two-step cascade method at Dalat Nuclear Research Reactor

Vuong Huu Tan1, Pham Dinh Khang2, Tran Tuan Anh3, Nguyen Nhi Dien3, Nguyen Xuan Hai3, Ho Huu Thang3, Pham Ngoc Son3, Mangengo Lumengano4
1 Vietnam Agency for Radiation and Nuclear Safety, 113 Tran Duy Hung, Hanoi, Vietnam
2 Vietnam Atomic Energy Institute, 59 Ly Thuong Kiet, Hanoi, Vietnam
3 Nuclear Research Institute, 01 Nguyen Tu Luc, Dalat, Vietnam
4 Agostinho Neto University, Av, 4 Fevereiro, 71 Ingombotas, Luanda, Angola

Main Article Content

Abstract

The event-event coincidence spectroscopy system was successfully established and operated on thermal neutron beam of channel N0. 3 at Dalat Nuclear Research Reactor (DNRR) with resolving time value of about 10 ns. The studies on level density, gamma strength function and decay scheme of intermediate-mass and heavy nuclei have been performed on this system. The achieved results are opening a new research of nuclear structure based on (n, 2ɣ) reaction.

Article Details

References

[1] A. A. Vankov et al. In Proc. Conf. on Nuclear Data for Reactors. Helsinki 1970, IAEA, Vienna, Vol.1, p.559 (1970).
[2] H.H. Bolotin. Thermal-neutron capture gamma-gamma coincidence studies and techniques, Proceedings of the 1981 International Symposium on Neutron Capture Gamma Ray Spectroscopy and Related Topics, Grenoble, France, p.15-34 (1981).
[3] S.T. Boneva et al. Two-step cascades of neutron radiative capture: 1. The spectroscopy of excited states of complex nuclei in the range of the neutron binding energy, Physics of Elementary Particles and Atomic Nuclei, Vol.22, Part.2, p.479-511 (1991).
[4] S.T. Boneva et al. Two-step cascades of neutron radiative capture: 2. Main parameters and peculiarities complex nuclei compound-states -decay, Physics of Elementary Particles and Atomic Nuclei, Vol.22, Part.6, p.1431-1475 (1991).
[5] Vuong Huu Tan et al. Investigation of gamma cascade transition of 153Sm, 182Ta, 59Ni and 239U using the gamma two step cascade method, Final report of the research project, Ministry of Sciences and Technology, Code BO/05/01/05, (2005-2006).