Production and decay of269110

Hofmann, S.; Ninov, V.; Heßberger, F. P.; Armbruster, P.; Folger, H.; Münzenberg, G.; Schött, H. J.; Popeko, A. G.; Yeremin, A. V.; Andreyev, A. N.; Šáró, Š.; Janik, R.; Leino, M.

doi:10.1007/bf01291181

Cited by 329 publications

(64 citation statements)

References 10 publications

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“…Elements 108 (Hs) [5][6][7], 109 (Mt) [8][9][10], 110 (Ds) [11], 111 (Rg) [12], 112 [13][14][15], 113 [16], 114 [17][18][19][20], 115 [3], 116 [21][22][23], 117 [24] and 118 [25,23] have been observed in a series of experiments in Berkeley, GSI, Dubna and RIKEN. Chemistry of transactinide elements 104 (Rf) to 108 has been performed one atom at a time (see, e.g., [26] for a review).…”

Section: Introductionmentioning

confidence: 99%

Are MCDF calculations 101% correct in the super-heavy elements range?

2011

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We explore QED and many-body effects in superheavy elements up to Z = 173 using the multiconfiguration Dirac-Fock method. We study the effect of going beyond the average-level approximation on the determination of the ground state of element 140, and compare with the recent work of Pekka Pyykkö on the periodic table for super heavy elements [1]. We confirm that QED corrections are of the order of 1% on ionization energies. We show that the atomic number at which the 1s shell dives into the negative energy continuum is 173, and is not affected by the approximation employed to evaluate the electron-electron interaction.

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Section: Introductionmentioning

confidence: 99%

Are MCDF calculations 101% correct in the super-heavy elements range?

2011

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“…In cold fusion reactions involving a doubly magic spherical target and a deformed projectile were used by GSI [13,14,15,16,17] to produce heavy elements upto Z = 110−112. In hot fusion evaporation reactions with a deformed transuranium target and a doubly magic spherical projectile were used in the synthesis of superheavy nuclei Z = 112−118 at Dubna [18,19,20,21,22,23,24].…”

Section: Introductionmentioning

confidence: 99%

Magic Nuclei in Superheavy Valley

Bhuyan

Patra

2012

Mod. Phys. Lett. A

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An extensive theoretical search for the proton magic number in the superheavy valley beyond Z =82 and corresponding neutron magic number after N =126 is carried out. For this we scanned a wide range of elements Z = 112 − 130 and their isotopes. The well established non-relativistic Skryme-Hartree-Fock and Relativistic Mean Field formalisms with various force parameters are used. Based on the calculated systematics of pairing gap, two neutron separation energy and the shell correction energy for these nuclei, we find Z =120 as the next proton magic and N=172, 182/184, 208 and 258 the subsequent neutron magic numbers. Keywords:After the discovery of artificial transmutation of elements by Sir Ernest Rutherford in 1919 [1], the search for new elements is an important issue in nuclear science. The existence of elements beyond the last heaviest naturally occurring 238 U, i.e., the discovery of Neptunium, Plutonium and other 14 elements (transuranium elements), which make a separate block in Mendeleev ′ s periodic table was a revolution in the Nuclear Chemistry. This enhancement in the periodic table raises a few questions in our mind:• Whether there is a limited number of elements that can co-exist either in nature or can be produced from artificial synthesis by using modern technique ?• What is the maximum number of protons and neutrons that of a nucleus ?• What is the next double shell closure nucleus beyond 208 Pb ?To answer these questions, first we have to understand the agent which is responsible to rescue the nucleus against Coulomb repulsion. The obvious reply is the shell energy, which stabilises the nucleus against Coulomb disintegration [2]. Many theoretical models, like the macroscopic−microscopic (MM) calculations to explain involve some prior knowledge of densities, single-particle potentials and other bulk properties which may accumulate serious error in the largely extrapolated mass region of interest. They predict the magic shells at Z=114 and N=184 [3,4,5,6] which could have surprisingly long life time even of the order of a million years [7,8,9,5,10]. Some other such predictions of shell-closure for the superheavy region within the relativistic and non-relativistic theories depend mostly on the force parameters [11,12].Experimentally, till now, the quest for superheavy nuclei has been dramatically rejuvenated in recent years owing to the emergence of hot and cold fusion reactions. In cold fusion reactions involving a doubly magic spherical target and a deformed projectile were used by GSI [13,14,15,16,17] to produce heavy elements upto Z = 110−112. In hot fusion evaporation reactions with a deformed transuranium target and a doubly magic spherical projectile were used in the synthesis of superheavy nuclei Z = 112−118 at Dubna [18,19,20,21,22,23,24]. At the production time of Z = 112 nucleus at GSI the fusion cross section was extremely small (1pb), which led to the conclusion that reaching still heavier elements will be very difficult. At this time, the emergence of hot fusion reactions usi...

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“…In considering documentation solicited from and submitted by claimant laboratories, the JWP used the criteria established in 1992 by the IUPAC-IUPAP Transfermium Working Group [1][2][3], and reinforced by the JWP in their first report [4]. The first JWP report, published in 2001, confirmed discovery of the element with atomic number 110 by the collaboration of Hofmann et al [5]. This led to element 110 being named darmstadtium with symbol Ds [6].…”

Section: Introductionmentioning

confidence: 57%