Fragment-mass and kinetic-energy distributions from the spontaneous fission of $sup 246$m
DOI
10.1103/PhysRevC.15.705
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• Cited By (22)
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• Cited By (22)
A. I. Svirikhin14
Estimated H-index: 14
(Joint Institute for Nuclear Research),
M. Gupta2
Estimated H-index: 2
(Manipal University),
A. V. Yeremin26
Estimated H-index: 26
(Joint Institute for Nuclear Research)
... more
The problem of studying the spontaneous fission of nuclei from the exotic region of short-lived neutron-deficient isotopes with Z ≥ 100 is considered. A combined detecting system is created in the focal plane of the VASSILISSA separator. The main part of this system is a neutron detector that allows us to measure the yields of spontaneous fission neutrons from nuclei produced in a total fusion reaction with heavy ion beams in the on-line mode. This procedure is used for the first time to acquire...
Ref 34
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2010 in Nature [IF: 40.14]
Michael Block17
Estimated H-index: 17
(University of Jyväskylä),
D. Ackermann1
Estimated H-index: 1
(University of Jyväskylä),
Klaus Blaum42
Estimated H-index: 42
(Max Planck Society)
... more
Present knowledge of the binding energy of the heaviest nuclides is based solely on the detection of their decay products. This paper reports the first direct mass measurements of the trans-uranium nuclides 252254No (nobelium, atomic number 102), which will be important for mapping the predicted 'island of stability' of superheavy elements.
Ref 32Cited 85
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2007 in European Physical Journal A [IF: 2.83]
B. Sulignano9
Estimated H-index: 9
,
S. Heinz12
Estimated H-index: 12
,
F. P. Heßberger25
Estimated H-index: 25
... more
A K isomer with a half-life of (110±10) ms at an excitation energy of 1254keV has been identified in the nucleus 252No . The isomer is interpreted as a two-quasineutron state with K π = 8- . The isotope 252No was produced in the fusion-evaporation reaction 206Pb(48Ca, 2n)252No . The experiment has been performed at the velocity filter SHIP of GSI Darmstadt.
Ref 22Cited 24
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J. F. Wild17
Estimated H-index: 17
(Lawrence Livermore National Laboratory),
E.K. Hulet13
Estimated H-index: 13
(Lawrence Livermore National Laboratory),
R. W. Lougheed19
Estimated H-index: 19
(Lawrence Livermore National Laboratory)
... more
Abstract We have measured the mass and total kinetic energy distributions from the spontaneous fission of 252 No, 254 No, 256 [104] and 258 [104]. The results, in combination with earlier measurements for 256 No, 258 No and 262 No, show a sharp transition from asymmetrical mass division in 256 No to symmetrical division for 258 No and 262 No. However, all isotopes of element 104, including 260 [104], appear to yield broadly symmetrical mass distributions. The total kinetic energies around 200 Me...
Ref 23Cited 5 Source Cite this paper
1984 in Accounts of Chemical Research [IF: 20.27]
Darleane C. Hoffman28
Estimated H-index: 28
Spontaneous fission was discovered in /sup 238/U as a natural mode of decay as long ago as 1940. However, because of the long spontaneous-fission half-life of /sup 238/U of about 10/sup 16/ years, the decay rate (specific activity) was so low that detailed studies of the properties of spontaneous fission had to await the synthesis of isotopes of higher Z elements with shorter spontaneous-fission half-lives. During the 1960s, milligram quantities of /sup 252/Cf became available to researchers thr...
Ref 28Cited 6 Source Cite this paper
A. I. Svirikhin14
Estimated H-index: 14
(Joint Institute for Nuclear Research),
M. Gupta2
Estimated H-index: 2
(Manipal University),
A. V. Eremin (Joint Institute for Nuclear Research)... more
For experiments aimed at the study of the spontaneous fission of transfermium nuclei, improvements in the focal-plane detector system of the VASSILISSA recoil separator have been made. A neutron detector consisting of 54 3He-filled counters has been mounted around the focal-plane detector chamber. A description of the detection system and the results of experiments aimed at investigating the neutron multiplicity of neutron-deficient isotopes of 252No and 244,246Fm are presented.
Ref 13
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M.R. Schmorak13
Estimated H-index: 13
(Oak Ridge National Laboratory)
Experimental data pertaining to the nuclear structure of nuclei with even mass numbers A = 246 through A = 262 have been compiled and evaluated (the odd-A mass chains, A = 245 through A = 263, are currently being revised for publication). In many cases where data are lacking, systematics developed by 72ElSc were used to obtain the needed values.
Ref 155Cited 13
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2010 in European Physical Journal A [IF: 2.83]
R. Gupta1
Estimated H-index: 1
,
S. S. Malik1
Estimated H-index: 1
The systematics of spontaneous fission in actinides and heavy elements are investigated within the framework of the semiclassical quantization. The interaction barrier is calculated by using the asymmetric two-centre shell model and its appropriate parameterization generates the analytical expression for the tunneling probability. The powerful semiclassical quantization technique lifts the degeneracy between the degenerate levels just after tunneling across the barrier. Our results clearly show ...
Ref 44Cited 6
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2012 in European Physical Journal A [IF: 2.83]
A. I. Svirikhin14
Estimated H-index: 14
,
A. V. Andreev1
Estimated H-index: 1
,
Victor Dushin3
Estimated H-index: 3
... more
The neutron detector with 3He -filled counters placed in the focal plane of the VASSILISSA separator is used for measuring the average number and determining the multiplicity distribution of prompt neutrons from the spontaneous fission of heavy short-lived isotopes. The test reaction $$\ensuremath \mathrm{{}^{48}Ca}+\mathrm{{}^{206}Pb}=2{\rm n}+\mathrm{{}^{252}No}$$ is used for tuning the separator settings and calibrating the detector system with the spontaneous fission of the 252No . The avera...
Ref 17Cited 7
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R.C. Barber1
Estimated H-index: 1
(University of Manitoba),
N.N. Greenwood1
Estimated H-index: 1
(University of Leeds),
A.Z. Hrynkiewicz1
Estimated H-index: 1
... more
Abstract In 1985 IUPAP and IUPAC decided to establish a Transfermium Working Group to consider questions of priority in the discovery of elements with nuclear charge number Z>;100. The membership of the Group was determined by the Unions in 1987. The Group met seven times for approximately one week each, three of the meetings being in the Laboratories of chief concern namely those at Berkeley, Darmstadt and Dubna. The work of the Group was carried out in two phases. Phase (i), the establishment ...
Ref 176Cited 46
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Spontaneous-fission branching in the decay of /sup 259/104
C.E. Bemis(Oak Ridge National Laboratory), Peter F. Dittner(Oak Ridge National Laboratory)
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