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Cited By22
A. I. Svirikhin14
Estimated H-index: 14
(Joint Institute for Nuclear Research),
M. Gupta2
Estimated H-index: 2
(Manipal University)
+ 9 AuthorsE. A. Sokol9
Estimated H-index: 9
(Joint Institute for Nuclear Research)
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...
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Published on Feb 11, 2010in Nature 41.58
Michael Block17
Estimated H-index: 17
(University of Jyväskylä),
D. Ackermann1
Estimated H-index: 1
(University of Jyväskylä)
+ 23 AuthorsF. P. Heßberger1
Estimated H-index: 1
(University of Jyväskylä)
The difference between the mass of an atom and the sum of its building blocks (the binding energy) is a manifestation of Einstein's famous relation E = mc2. Superheavy elements have been observed, but our present knowledge of the binding energy of these nuclides is based only on the detection of their decay products, although they represent the gateway to the predicted 'island of stability'. Here, direct mass measurements of trans-uranium nuclides are reported, providing reliable anchor points e...
88 Citations Source Cite
Published on Sep 1, 2007in European Physical Journal A 2.80
B. Sulignano9
Estimated H-index: 9
,
S. Heinz12
Estimated H-index: 12
+ 14 AuthorsB. Lommel22
Estimated H-index: 22
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.
25 Citations Source Cite
Published on Oct 1, 1994in Journal of Alloys and Compounds 3.78
J. F. Wild17
Estimated H-index: 17
(Lawrence Livermore National Laboratory),
E.K. Hulet13
Estimated H-index: 13
(Lawrence Livermore National Laboratory)
+ 4 AuthorsA. Veeck1
Estimated H-index: 1
(Lawrence Livermore National Laboratory)
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...
5 Citations Source Cite
Published on Jul 1, 1984in Accounts of Chemical Research 20.95
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...
6 Citations Source Cite
Published on Jan 1, 2012in Physics of Particles and Nuclei Letters
A. I. Svirikhin14
Estimated H-index: 14
(Joint Institute for Nuclear Research),
M. Gupta2
Estimated H-index: 2
(Manipal University)
+ 9 AuthorsE. A. Sokol9
Estimated H-index: 9
(Joint Institute for Nuclear Research)
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.
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Published on Mar 1, 1976in Nuclear Data Sheets 1.96
M.R. Schmorak15
Estimated H-index: 15
(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.
13 Citations Source Cite
Published on Aug 1, 2010in European Physical Journal A 2.80
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 ...
6 Citations Source Cite
Published on Sep 1, 2012in European Physical Journal A 2.80
A. I. Svirikhin14
Estimated H-index: 14
,
A. V. Andreev1
Estimated H-index: 1
+ 12 AuthorsA. N. Kuznetsov2
Estimated H-index: 2
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...
7 Citations Source Cite
Published on Jan 1, 1992in Progress in Particle and Nuclear Physics 11.05
R.C. Barber1
Estimated H-index: 1
(University of Manitoba),
N.N. Greenwood1
Estimated H-index: 1
(University of Leeds)
+ 6 AuthorsD.H. Wilkinson2
Estimated H-index: 2
(University of Sussex)
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 ...
49 Citations Source Cite
View next paperMass and total kinetic energy distributions from the spontaneous fission of $sup 246$Cm