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Journal Articles

Neutron-hole states in $$^{131}$$Sn and spin-orbit splitting in neutron-rich nuclei

Orlandi, R.; Pain, S. D.*; Ahn, S.*; Jungclaus, A.*; Schmitt, K. T.*; Bardayan, D. W.*; Catford, W. N.*; Chapman, R.*; Chipps, K. A.*; Cizewski, J. A.*; et al.

Physics Letters B, 785, p.615 - 620, 2018/10

 Times Cited Count:1 Percentile:49.68(Astronomy & Astrophysics)

Journal Articles

Recoil-$$alpha$$-fission and recoil-$$alpha$$-$$alpha$$-fission events observed in the reaction $$^{48}$$Ca + $$^{243}$$Am

Forsberg, U.*; Rudolph, D.*; Andersson, L.-L.*; Di Nitto, A.*; D$"u$llmann, Ch. E.*; Fahlander, C.*; Gates, J. M.*; Golubev, P.*; Gregorich, K. E.*; Gross, C. J.*; et al.

Nuclear Physics A, 953, p.117 - 138, 2016/09

 Times Cited Count:22 Percentile:4.76(Physics, Nuclear)

Alpha-decay chains observed in the element-115 production reactions of $$^{48}$$Ca + $$^{243}$$Am were investigated using a new data set consisting of our recently reported data obtained at GSI and previously reported ones at Dubna and LBNL. Short decay chains of recoil-$$alpha$$-($$alpha$$)-fission type, fourteen of which were observed, and some of which were interpreted as the 2-neutron evaporation products $$^{289}$$Mc, have been reassigned. It is plausible that most of them were assigned to the 3-neutron evaporation products $$^{288}$$Mc whose decay chain would on the way have branches of EC decays followed by fission.

Journal Articles

Origin of the spin Seebeck effect in compensated ferrimagnets

Gepr$"a$gs, S.*; Kehlberger, A.*; Coletta, F.*; Qiu, Z.*; Guo, E.-J.*; Schulz, T.*; Mix, C.*; Meyer, S.*; Kamra, A.*; Althammer, M.*; et al.

Nature Communications (Internet), 7, p.10452_1 - 10452_6, 2016/02

 Times Cited Count:49 Percentile:2.95(Multidisciplinary Sciences)

Journal Articles

Selected spectroscopic results on element 115 decay chains

Rudolph, D.*; Forsberg, U.*; Golubev, P.*; Sarmiento, L. G.*; Yakushev, A.*; Andersson, L.-L.*; Di Nitto, A.*; D$"u$llmann, Ch. E.*; Gates, J. M.*; Gregorich, K. E.*; et al.

Journal of Radioanalytical and Nuclear Chemistry, 303(2), p.1185 - 1190, 2015/02

 Times Cited Count:6 Percentile:28.02(Chemistry, Analytical)

Thirty correlated $$alpha$$-decay chains of element 115 were observed, which were consistent with previous observations interpreted as the decay chain of $$^{288}$$115. GEANT4 Monte-Carlo simulations were performed to reproduce high-resolution $$alpha$$-photon coincidence results, which allows one to propose Q$$_{alpha}$$ values and excitation schemes of the superheavy nuclei with unprecedented precision.

Journal Articles

Spectroscopic tools applied to element Z = 115 decay chains

Forsberg, U.*; Rudolph, D.*; Golubev, P.*; Sarmiento, L. G.*; Yakushev, A.*; Andersson, L.-L.*; Di Nitto, A.*; D$"u$llmann, Ch. E.*; Gates, J. M.*; Gregorich, K. E.*; et al.

EPJ Web of Conferences (Internet), 66, p.02036_1 - 02036_4, 2014/03

 Times Cited Count:5 Percentile:9.47

A focal-plane Si detector setup applied to the spectroscopy of the element 115 $$alpha$$-decay chains was reported. Results of the digital signal analysis for preamplifier signals and of the event-by-event $$alpha$$-energy loss correction analysis were presented. The detectors consist of five double-sided Si strip detectors (DSSSD) arranged as a box, and signals from one side of the detector at the bottom of the box were digitally processed. Energy losses of $$alpha$$ particles detected by two Si detectors at the bottom and a side differs event-by-event, because each $$alpha$$ particle passed through two dead layers with a certain tilted angle. By correcting for the energy loss of each $$alpha$$ event using the angle of the $$alpha$$-particle emission extracted from the detected positions, we succeeded in improving the $$alpha$$ energy resolution significantly.

Journal Articles

Alpha-photon coincidence spectroscopy along element 115 decay chains

Rudolph, D.*; Forsberg, U.*; Golubev, P.*; Sarmiento, L. G.*; Yakushev, A.*; Andersson, L.-L.*; Di Nitto, A.*; D$"u$llmann, Ch. E.*; Gates, J. M.*; Gregorich, K. E.*; et al.

Acta Physica Polonica B, 45(2), p.263 - 272, 2014/02

 Times Cited Count:15 Percentile:21.56(Physics, Multidisciplinary)

Produced in the reaction of $$^{48}$$Ca beam with an $$^{243}$$Am target, thirty correlated $$alpha$$-decay chains were observed. Observed decay chains are consistent with a previously reported decay chain, which confirms the identification of the element 115. In addition, an $$alpha$$-photon coincidence measurement was performed, and $$gamma$$ rays as well as X-ray candidates were observed in this decay chain. The $$gamma$$-ray observation in the heaviest region of superheavy nuclei brings a big progress in the superheavy nuclear structure studies.

Journal Articles

Spectroscopy of element 115 decay chains

Rudolph, D.*; Forsberg, U.*; Golubev, P.*; Sarmiento, L. G.*; Yakushev, A.*; Andersson, L. L.*; Di Nitto, A.*; D$"u$llmann, Ch. E.*; Gates, J. M.*; Gregorich, K. E.*; et al.

Physical Review Letters, 111(11), p.112502_1 - 112502_5, 2013/09

 Times Cited Count:88 Percentile:2.76(Physics, Multidisciplinary)

Journal Articles

Quantitative study of the spin Hall magnetoresistance in ferromagnetic insulator/normal metal hybrids

Althammer, M.*; Meyer, S.*; Nakayama, Hiroyasu*; Schreier, M.*; Altmannshofer, S.*; Weiler, M.*; Huebl, H.*; Gepr$"a$gs, S.*; Opel, M.*; Gross, R.*; et al.

Physical Review B, 87(22), p.224401_1 - 224401_15, 2013/06

 Times Cited Count:233 Percentile:0.59(Materials Science, Multidisciplinary)

We experimentally investigate and quantitatively analyze the spin Hall magnetoresistance (SMR) effect in ferromagnetic insulator (FI)/Pt and FI/nonmagnetic metal/Pt hybrid structures. For the FI, we use either YIG, nickel ferrite, or magnetite and for the nonmagnet, Cu or Au. The SMR is theoretically ascribed to the combined action of spin Hall and inverse spin Hall effect in the Pt top layer. It therefore should characteristically depend upon the orientation of the magnetization in the adjacent ferromagnet and prevail even if an additional, nonmagnetic metal layer is inserted between Pt and the ferromagnet. Our experimental data corroborate these theoretical conjectures. Using the SMR theory to analyze our data, we extract the spin Hall angle and the spin diffusion length in Pt. For a spin-mixing conductance of $$4times 10^{14}Omega^{-1}$$m$$^{-2}$$, we obtain a spin Hall angle of 0.11 $$pm$$ 0.08 and a spin diffusion length of (1.5 $$pm$$ 0.5) nm for Pt in our samples.

Oral presentation

Neutron hole states in $$^{131}$$Sn studied via the $$^{132}$$Sn(d,t)$$^{131}$$Sn reaction

Orlandi, R.; Pain, S. D.*; Bardayan, D. W.*; Gross, C. J.*; Smith, M. S.*; Jungclaus, A.*; Ahn, S.*; Jones, K. L.*; Pittman, S. T.*; Schmitt, K. T.*; et al.

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