Creation of SHE factory based on the high-intensity universal DC-280 cyclotron (A ≤ 238, E ≤ 10 MeV·A, I ≤ 20 pµA) in a new separate experimental building is a part of the DRIBs-III project according to the Seven-Year Plan for the Development of JINR 2010-2016 approved by the Committee of Plenipotentiaries of the Governments of the JINR Member States (CPP) in November 2009.
The SuperHeavy Element Factory will increase the overall production of super-heavy nuclei by one-two orders of magnitude with respect to presently achieved rates. This will enable the studies of nuclear /atomic structure of heaviest atoms and open the door to the discoveries of new elements above Z=118 and of isotopes closer to the predicted shell closure at N=184.
SHE Factory Goals
Experiments at the extremely low (σ<100 fb) cross sections:
Synthesis of new SHE in reactions with 50Ti, 54Cr ...;
Synthesis of new isotopes of SHE;
Study of decay properties of SHE;
Study of excitation functions.
Experiments requiring high statistics:
Nuclear spectroscopy of SHE;
Precise mass measurements;
Study of chemical properties of SHE.
DC280 cyclotron, a stand-alone SHE-factory
Synthesis and study of properties of superheavy elements;
Search for new reactions for SHE-synthesis;
Chemistry of new elements;
DC-280 (expected) E=4 - 8 MeV/A
Ion
Ion energy [MeV/A]
Output intensity
7Li
4
1x1014
18O
8
1x1014
40Ar
5
6x1013
48Ca
5
0,6-1,2x1014
54Cr
5
2x1013
58Fe
5
1x1013
124Sn
5
2x1012
136Xe
5
1x1014
238U
7
5x1010
DC280 cyclotron main parameters
Ion source
DECRIS-4 - 14GHz
DECRIS-SC3 - 18GHz
Injecting beam potential
Up to 100kV
A/Z range
4÷7
Energy
4÷8 MeV/n
Magnetic field level
0.6÷1.35T
K factor
280
Gap between plugs
400 mm
Valley/hill gap
500/208 mm/mm
Magnet weight
1000t
Magnet power
300 kW
Dee voltage
2x130 kV
RF power consumption
2x30 kW
Flat-top dee voltage
2x14 kV
Main setups:
Gas-filled recoil separator (DGFRS-II);
Preseparator for chemical investigations;
Separator for Heavy Element Spectroscopy: velocity filter SHELS;
