Investigation of the Pu244(Ca48,xn)Fl292−x reaction with the LBNL SHREC detector: Investigation of decay chains of isotopes of flerovium (Z=114)
- Gates, JM;
- Orford, R;
- Rudolph, D;
- Chemey, AT;
- Clark, RM;
- Crawford, HL;
- Fallon, P;
- Folden, CM;
- Garcia, FH;
- Golubev, P;
- Gooding, JA;
- Gregorich, KE;
- Henderson, RA;
- Hrabar, Y;
- Kirkland, AS;
- McCarthy, M;
- Mildon, JA;
- Pore, JL;
- Porzio, C;
- Rice, E;
- Sarmiento, LG;
- Stoyer, MA;
- Thomas, K;
- Wooddy, PT
Abstract
The Pu244(Ca48,xn)Fl292−x reaction was investigated at Lawrence Berkeley National Laboratory’s 88 Inch Cyclotron using the Berkeley Gas-filled Separator (BGS), the newly installed Superheavy Recoil detector, along with an upgraded digital electronics and data acquisition system. Seven decay chains were observed starting with an evaporation residue, followed by a single α decay and a spontaneous fission. The decay characteristics of these seven decay chains led to an assignment to Fl288, the product of the 4n reaction channel. Two additional chains were (tentatively) assigned to the decay of the 3n exit channel, Fl289. Cross sections for the 4n and 3n exit channels were σprod=6.7(2536) pb and σprod=1.6(1122) pb, respectively. Another decay chain, tentatively assigned to the 5n exit channel through the Ca48+Pu244 reaction or the 3n exit channel of the Ca48+Pu242 reaction, was also detected. Detailed information regarding the observed decay chains and their nuclear structure aspects is discussed, along with the performance of the BGS and the new detection system.
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