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Title: Spontaneous fission of the odd-Z isotope 255Db

Journal Article · · Physical Review. C
 [1];  [1];  [1];  [2];  [3];  [1];  [1];  [1];  [4];  [1];  [4];  [5]
  1. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  2. Univ. Autonoma de Madrid (Spain); Technical University of Madrid (Spain)
  3. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Simon Fraser Univ., Burnaby, BC (Canada)
  4. University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  5. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
+ Show Author Affiliations

Experiments conducted at Lawrence Berkeley National Laboratory's 88-Inch Cyclotron Facility aimed to produce and study the decay of the previously unobserved isotope 255Db. This isotope was produced in the 206Pb(51V, 2⁢n) 255Db reaction, separated from unreacted beam material and reaction by-products with the Berkeley Gas-filled Separator, and then implanted into a double-sided silicon-strip detector at the BGS focal plane. Decay properties of 255Db were determined from the analysis of evaporation residue (EVR) fission and EVR-α–α correlations. The properties of this new isotope of dubnium differ dramatically from those of its neighboring Db isotopes. 255Db was found to decay primarily by spontaneous fission (SF) with a small α-decay branch, where the average half-life of the observed decays was t1/2 = 2.6$$^{+0.4}_{– 0.3}$$ ms. Theoretical calculations were performed using the Wentzel-Kramers-Brillouin approximation, with parameters calculated within a self-consistent microscopic approach, to see if these unique properties could be reproduced. A SF half-life estimate is obtained that closely matches the measured value, while simultaneously pointing out the sensitivities that need to be further constrained in future work.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
AC02-05CH11231; AC52-07NA27344
OSTI ID:
2479294
Journal Information:
Physical Review. C, Journal Name: Physical Review. C Journal Issue: 4 Vol. 110; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (51)

Cluster radioactivity in xenon isotopes journal April 2004
Spontaneous fission and alpha-decay properties of neutron deficient isotopes 257−253104 and 258106 journal December 1997
Decay properties of neutron-deficient isotopes 256, 257Db, 255Rf, 252, 253Lr journal September 2001
Exotic decay: Transition from cluster mode to fission mode journal October 2002
Decay of dinuclear systems formed from dubnium journal November 2021
Nuclear systematics of the heavy elements—II Lifetimes for alpha, beta and spontaneous fission decay journal March 1966
Deformed superheavy nuclei journal June 1989
Nuclear deformation energy curves with the constrained Hartree-Fock method journal March 1973
A dynamic analysis of spontaneous-fission half-lives journal May 1981
Influence of the pairing vibrations on spontaneous fission probability journal November 1989
Predictions on the modes of decay of odd Z superheavy isotopes within the range 105 ≤ Z ≤ 135 journal May 2018
Simulation of recoil trajectories in gas-filled magnetic separators journal May 2013
Spontaneous fission half-lives of heavy nuclei in ground state and in isomeric state journal September 2005
The competition between alpha decay and spontaneous fission in odd–even and odd–odd nuclei in the range 99≤Z≤129 journal August 2015
Theory of nuclear fission journal July 2022
Status report of the 28GHz superconducting electron cyclotron resonance ion source VENUS (invited) journal March 2006
The third generation superconducting 28 GHz electron cyclotron resonance ion source VENUS (invited) journal February 2010
Alpha emission and spontaneous fission through quasi-molecular shapes journal June 2000
Microscopic description of the competition between spontaneous fission andα-decay in neutron-rich Ra, U and Pu nuclei journal June 2017
Microscopic self-consistent description of induced fission: Dynamical pairing degree of freedom journal October 2021
Role of dynamic pairing correlations in fission dynamics. II. Fermium and nobelium isotopes journal August 2022
Discovery of the new isotope Lr251 : Impact of the hexacontetrapole deformation on single-proton orbital energies near the Z=100 deformed shell gap journal December 2022
Least action description of dynamic pairing correlations in the fission of curium and californium isotopes based on the Gogny energy density functional journal April 2023
Possibility to synthesize Z=120 superheavy nuclei with Z>20 projectiles journal July 2023
Dependence of the fission half-lives of heavy nuclei on the highest proton magic number within a macro-microscopic approach journal September 2023
Significance of the compound nucleus surface energy coefficients in the synthesis of superheavy nuclei with Z=112–120 journal September 2023
Spontaneous fission half-lives of actinides and superheavy elements journal October 2023
Properties of the Db256 decay chain journal October 2024
Potential energy surfaces of superheavy nuclei journal October 1998
Self-consistent calculations of fission barriers in the Fm region journal July 2002
Microscopic justification of the equal filling approximation journal July 2008
Microscopic mechanism of charged-particle radioactivity and generalization of the Geiger-Nuttall law journal October 2009
Fission barriers for even-even superheavy nuclei journal July 2010
Single universal curve for cluster radioactivities andαdecay journal January 2011
Cluster decay of superheavy nuclei journal March 2012
Fission properties of the Barcelona-Catania-Paris-Madrid energy density functional journal November 2013
Microscopic description of fission in uranium isotopes with the Gogny energy density functional journal May 2014
Dynamic versus static fission paths with realistic interactions journal November 2014
Pairing-induced speedup of nuclear spontaneous fission journal December 2014
Multidimensionally constrained relativistic Hartree-Bogoliubov study of spontaneous nuclear fission journal December 2015
Microscopic modeling of mass and charge distributions in the spontaneous fission of Pu 240 journal January 2016
Least action description of spontaneous fission in fermium and nobelium nuclei based on the Gogny energy density functional journal September 2018
First Gogny-Hartree-Fock-Bogoliubov Nuclear Mass Model journal June 2009
Universal Decay Law in Charged-Particle Emission and Exotic Cluster Radioactivity journal August 2009
Perspectives of Synthesis of Some New Superheavy Nuclei journal August 2023
Studies of neutron-deficient mendelevium isotopes at SHIP journal November 2009
Microscopic description of fission in nobelium isotopes with the Gogny-D1M energy density functional journal November 2016
Microscopic description of fission in odd-mass uranium and plutonium nuclei with the Gogny energy density functional journal December 2017
Alpha-gamma decay studies of $$^{247}$$Md journal January 2022
Experimental investigation of cross sections for the production of heavy and superheavy nuclei journal September 2022
Nucleosynthesis and observation of the heaviest elements journal February 2023

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