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Investigation of the 244Pu(48Ca,xn)292-xFl reaction with the LBNL SHREC detector: Investigation of decay chains of isotopes of flerovium (Z = 114)

Gates, J. M. ; Orford, R. ; Rudolph, D. LU orcid ; Chemey, A. T. ; Clark, Roderick M. ; Crawford, H. L. ; Fallon, P. ; Folden, C. M. ; Garcia, F. H. and Golubev, P. LU , et al. (2026) In Physical Review C 113(2).
Abstract
The 244Pu(48Ca,xn)292-xFl reaction was investigated at Lawrence Berkeley National Laboratory's 88 Inch Cyclotron using the Berkeley Gas-filled Separator (BGS), the newly installed SuperHeavy RECoil (SHREC) detector, along with an upgraded digital electronics and data acquisition system. Seven decay chains were observed starting with an evaporation residue (EVR) followed by a single α decay and a spontaneous fission (SF). The decay characteristics of these seven decay chains led to an assignment to 288Fl, the product of the 4n reaction channel. Two additional chains were (tentatively) assigned to the decay of the 3n exit channel, 289Fl. Cross sections for the 4n and 3n exit channels... (More)
The 244Pu(48Ca,xn)292-xFl reaction was investigated at Lawrence Berkeley National Laboratory's 88 Inch Cyclotron using the Berkeley Gas-filled Separator (BGS), the newly installed SuperHeavy RECoil (SHREC) detector, along with an upgraded digital electronics and data acquisition system. Seven decay chains were observed starting with an evaporation residue (EVR) followed by a single α decay and a spontaneous fission (SF). The decay characteristics of these seven decay chains led to an assignment to 288Fl, the product of the 4n reaction channel. Two additional chains were (tentatively) assigned to the decay of the 3n exit channel, 289Fl. Cross sections for the 4n and 3n exit channels were  σprod=6.7(3625) pb and σprod=1.6(2211) pb, respectively. Another decay chain, tentatively assigned to the 5n exit channel through the 48Ca+244Pu reaction or the 3n exit channel of the 48Ca+242Pu reaction, was also detected. Detailed information regarding the observed decay chains and their nuclear structure aspects are discussed, along with the performance of the BGS and the new detection system. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Superheavy elements, Nuclear reactions, Nuclear structure, Radiation detectors
in
Physical Review C
volume
113
issue
2
article number
024611
pages
15 pages
publisher
American Physical Society
ISSN
2469-9985
DOI
10.1103/kjyy-t1nk
project
Characterization of New Superheavy Elements
Heavy Element Research at LBNL 88-Inch Cyclotron
Superheavy Element Research at Lawrence Berkeley National Laboratory
language
English
LU publication?
yes
id
9c2fb7d1-1334-44bf-897e-93a841859215
date added to LUP
2026-02-14 10:44:15
date last changed
2026-02-17 08:22:44
@article{9c2fb7d1-1334-44bf-897e-93a841859215,
  abstract     = {{The <sup>244</sup>Pu(<sup>48</sup>Ca,xn)<sup>292-x</sup>Fl reaction was investigated at Lawrence Berkeley National Laboratory's 88 Inch Cyclotron using the Berkeley Gas-filled Separator (BGS), the newly installed SuperHeavy RECoil (SHREC) detector, along with an upgraded digital electronics and data acquisition system. Seven decay chains were observed starting with an evaporation residue (EVR) followed by a single α decay and a spontaneous fission (SF). The decay characteristics of these seven decay chains led to an assignment to <sup>288</sup>Fl, the product of the 4n reaction channel. Two additional chains were (tentatively) assigned to the decay of the 3n exit channel, <sup>289</sup>Fl. Cross sections for the 4n and 3n exit channels were  σ<sub>prod</sub>=6.7(<sup>36</sup><sub>25</sub>) pb and σ<sub>prod</sub>=1.6(<sup>22</sup><sub>11</sub>) pb, respectively. Another decay chain, tentatively assigned to the 5n exit channel through the <sup>48</sup>Ca+<sup>244</sup>Pu reaction or the 3n exit channel of the <sup>48</sup>Ca+<sup>242</sup>Pu reaction, was also detected. Detailed information regarding the observed decay chains and their nuclear structure aspects are discussed, along with the performance of the BGS and the new detection system.}},
  author       = {{Gates, J. M. and Orford, R. and Rudolph, D. and Chemey, A. T. and Clark, Roderick M. and Crawford, H. L. and Fallon, P. and Folden, C. M. and Garcia, F. H. and Golubev, P. and Gooding, J.A. and Gregorich, K. E. and Henderson, R. A. and Hrabar, Y. and Kirkland, A. S. and McCarthy, M. and Mildon, J. A. and Pore, J. L. and Porzio, C. and Rice, E. and Sarmiento, L. G. and Stoyer, M. A. and Thomas, K. and Wooddy, P. T.}},
  issn         = {{2469-9985}},
  keywords     = {{Superheavy elements; Nuclear reactions; Nuclear structure; Radiation detectors}},
  language     = {{eng}},
  month        = {{02}},
  number       = {{2}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review C}},
  title        = {{Investigation of the <sup>244</sup>Pu(<sup>48</sup>Ca,xn)<sup>292-x</sup>Fl reaction with the LBNL SHREC detector: Investigation of decay chains of isotopes of flerovium (<i>Z</i> = 114)}},
  url          = {{https://lup.lub.lu.se/search/files/242328069/kjyy-t1nk.pdf}},
  doi          = {{10.1103/kjyy-t1nk}},
  volume       = {{113}},
  year         = {{2026}},
}