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Andreyev, A. N.*; Huyse, M.*; Van Duppen, P.*; Qi, C.*; Liotta, R. J.*; Antalic, S.*; Ackermann, D.*; Franchoo, S.*; Heberger, F. P.*; Hofmann, S.*; et al.
Physical Review Letters, 110(24), p.242502_1 - 242502_5, 2013/06
被引用回数:90 パーセンタイル:93.91(Physics, Multidisciplinary)-decay data for more than 20 nuclei of the most neutron-deificient isotopes in the region from lead to thorium was obtained. The combined analysis allowed us for the first time to clearly show that crossing the Z=82 shell to higher proton numbers strongly accelerates the decay. The analysis support the conjecture that both the N=126 and Z=82 shell closures stongly influence the -formation probability.
Andreyev, A. N.*; Liberati, V.*; Antalic, S.*; Ackermann, D.*; Barzakh, A.*; Bree, N.*; Cocolios, T. E.*; Diriken, J.*; Elseviers, J.*; Fedorov, D.*; et al.
Physical Review C, 87(5), p.054311_1 - 054311_8, 2013/05
被引用回数:16 パーセンタイル:69.99(Physics, Nuclear)-decay studies of Tl and its dahghter products Au and Ir were carried out in two complementary experiments at the mass separator ISOLDE (CERN) and velocity filter SHIP (GSI). The nucluesu Au has decay properties of half-life 207 ms and -decay energy 6433 keV. The ground state spins and parities for Au and Ir were determined to be 1/2.
Lane, J. F. W.*; Andreyev, A. N.*; Antalic, S.*; Ackermann, D.*; Gerl, J.*; Heberger, F. P.*; Hofmann, S.*; Huyse, M.*; Kettunen, H.*; Kleinbhl, A.*; et al.
Physical Review C, 87(1), p.014318_1 - 014318_7, 2013/01
被引用回数:15 パーセンタイル:68.19(Physics, Nuclear)By using the technique of correlating implanted evaporation residues and their subsequent fission decay, -delayed fission (DF) of Bi has been identified for the first time and DF of Bi has been unambiguously confirmed. The experiments were performed at the velocity filter SHIP (GSI, Darmstadt). The DF probabilities for both nuclides were qualitatively estimated, and, in particular indications for a large value in the case of Bi are regarded.
Heberger, F. P.*; Antalic, S.*; Ackermann, D.*; Kalaninov, Z.*; Heinz, S.*; Hofmann, S.*; Streicher, B.*; Kindler, B.*; Kojouharov, I.*; Kuusiniemi, P.*; et al.
European Physical Journal A, 48(5), p.75_1 - 75_9, 2012/05
被引用回数:26 パーセンタイル:78.16(Physics, Nuclear)Nuclear structure and decay of the isotope No and its decay products Fm and Md were investigated by means of - spectroscopy. Besides the established strong transitions from the 9/2[734] Nilsson level in Fm, populated predominantly by the decay of No, into the ground-state(gs) rotational band, a couple of weaker lines were observed and placed into the Fm level scheme. The transition from the 7/2 level in Es, populated by the decay of Md, into the 9/2 member of the gs rotational band, so far established for other odd-mass Es isotopes, was observed clearly. The GEANT4 simulations were performed to investigate the influence of energy summing between particles and conversion electrons (CE) on the shape of the spectra at different implantation energies, leading to evidence for a weak decay branch of No into the gs of Fm or the ground-state rotational band, respectively.
Antalic, S.*; Heberger, F. P.*; Ackermann, D.*; Heinz, S.*; Hofmann, S.*; Kalaninov, Z.*; Kindler, B.*; Khuyagbaatar, J.*; Kojouharov, I.*; Kuusiniemi, P.*; et al.
European Physical Journal A, 47(5), p.62_1 - 62_12, 2011/05
被引用回数:29 パーセンタイル:82.95(Physics, Nuclear)Nuclear structure and decay of isomer in No were investigated. The isotope was produced by the reaction Ca+Pb. The excitation energy of the known single-particle isomeric state (5/2[622]) was measured by delayed coincidence between -rays and implanted evaporation residues and was placed into the level scheme. In addition, decay of a high-lying multi-quasiparticle isomer in No was studied using e- coincidence measurements. A rotational band populated by its de-excitation was identified in No. A new isomeric state in Fm was observed and a partial-level scheme for this isotope is suggested. In addition transitions from excited levels are reproduced for Md.
Heberger, F. P.*; Antalic, S.*; Sulignano, B.*; Ackermann, D.*; Heinz, S.*; Hofmann, S.*; Kindler, B.*; Khuyagbaatar, J.*; Kojouharov, I.*; Kuusiniemi, P.*; et al.
European Physical Journal A, 43(1), p.55 - 66, 2010/01
被引用回数:71 パーセンタイル:95.19(Physics, Nuclear)-rays decay study of two K isomers in No was performed. Two new transitions of 778 and 856 keV could be attributed to the decay pattern of No (T=275 ms). The population of an excited band built up on this isomer (=8) by the decay of No (198 s) could be proven. A spontaneous fission branch of 2.010 was measured for No, and upper limit of 1.210 was estimated for No. These values demonstrate the high stability of multi-quasiparticle configuration against spontaneous fission.
Antalic, S.*; Heberger, F. P.*; Hofmann, S.*; Ackermann, D.*; Heinz, S.*; Kindler, B.*; Kojouharov, I.*; Kuusiniemi, P.*; Leino, M.*; Lommel, B.*; et al.
European Physical Journal A, 38(2), p.219 - 226, 2008/11
被引用回数:34 パーセンタイル:84.78(Physics, Nuclear)The radioactive decay of the isotopes Lr and their daughter products was investigated by means of , prompt and delayed conversion electron coincidence spectroscopy. The experiment was carried out at GSI by using the velocity filter SHIP to separate evaporation residues, produced in the reaction Ca+Bi, from the primary beams. In Lr, a second short-lived isomer with a half-life of 1.91 ms was found. For Lr, new data for transitions of levels in Md populated by decay were observed. The constructed level schemes are useful for the nuclear structure theory.