R. Wyss

Details der Publikationsliste

Zeitraum

1988 - 2009

Anzahl

163

Co-Autoren

Time-lapsed assessment of microcrack initiation and propagation in murine cortical bone at submicrometer resolution (2009)

Schneider, P, Stauber, M, Wyss, R, Stampanoni, M, Sennhauser, U, ...

The strength of bone tissue is not only determined by its mass, but also by other properties usually referred to as bone quality, such as microarchitecture, distribution of bone cells, or microcracks...

Ada: a playful interactive space (2007)

T. Delbrück, K. Eng, A. Bäbler, U. Bernardet, M. Blanchard, A. Briska, ...

Abstract: This paper and the accompanying video describe Ada, an immersive 160m 2 space for human-machine interaction. Ada is conceived as an artificial organism that plays with its visitors, with...

High-spin isomeric structures in exotic odd-odd nuclei: Exploration of the proton drip line and beyond (2007)

Liu, H. L., Xu, F. R., Xu, S. W., Wyss, R., Walker, P. M.

We investigate the role of two-quasiparticle isomeric states along the proton drip line, using configuration-constrained potential-energy-surface calculations. In contrast to even-even nuclei,...

High-Spin Isomeric Structures in Exotic Odd-Odd Nuclei: Exploration of the Proton Drip Line and Beyond (2007)

Liu, H L, Xu, F R, Xu, S W, Wyss, R, Walker, P M

We investigate the role of two-quasiparticle isomeric states along the proton drip line, using configuration-constrained potential-energy-surface calculations. In contrast to even-even nuclei,...

alpha decay of the new isotopes Rn-193,Rn-194 (2006)

Antalic, S, Ackermann, D, Bianco, L, ...

The new neutron-deficient isotopes Rn-193,Rn-194 have been identified in the complete fusion reaction Cr-52+Sm-144 -> Rn-196(*) at the velocity filter SHIP. The alpha-decay energy and half-life value...

alpha-decay hindrance factors: A probe of mean-field wave function (2006)

Liotta, RJ, Wyss, R

A simple model to calculate alpha-decay hindrance factors (HF) with special emphasis on the shape coexistence in the Pb-Po region is presented. Using deformation values obtained from potential energy...

Critical Survey of Isoscalar and Isovector Contributions to the Spin Orbit Potential in Relativistic Mean Field Theory (2006)

Bhagwat, A., Wyss, R., Satula, W., Meng, J., Gambhir, Y. K.

The spin-orbit (SO) interaction, emerging naturally from the Relativistic Mean Field (RMF) theory is examined critically in the light of the recently measured excitation energy differences between...

alpha-decay of the new isotope Po-187: Probing prolate structures beyond the neutron mid-shell at N=104 (2006)

Antalic, S, Ackermann, D, Franchoo, S, Hessberger, FP, Hofmann, S, ...

The new neutron-deficient isotope Po-187 has been identified in the complete fusion reaction Ti-46+Sm-144 -> Po-187+3n at the velocity filter SHIP. Striking features of the Po-187 alpha decay are the...

Systematics of proton emission (2006)

Delion, D. S., Liotta, R. J., Wyss, R.

A very simple formula is presented that relates the logarithm of the half-life, corrected by the centrifugal barrier, with the Coulomb parameter in proton decay processes. The corresponding...

Mass number dependence of the Skyrme-force-induced nuclear symmetry energy (2005)

Rafalski, M., Satula, W., Wyss, R.

The global mass dependence of the nuclear symmetry energy and its two basic ingredients due to the mean-level spacing and effective strength of the isovector mean-potential is studied within the...

A Complex Shell Model Representation Including Antibound States (2005)

Betan, R. Id, Liotta, R. J., Sandulescu, N., Vertse, T., Wyss, R.

A generalization of the Complex Shell Model formalism is presented which includes antibound states in the basis. These states, together with bound states, Gamow states, and the continuum background,...

Probing structural changes in the very neutron-deficient Os isotopes with recoil-decay tagging (2005)

Joss, D.T., Amzal, N., Appelbe, D.E., Back, T., Bentley, M.A., Cederwall, B., ...

In recent years, the exploitation of the recoil-decay tagging (RDT) technique with large arrays of germanium detectors has revealed much information about the structure of heavy nuclei approaching...

Observation of negative-parity high-spin states of As-68 (2005)

Lieb, KP, De Angelis, G, Curien, D, Eberth, J, ...

The neutron-deficient nucleus As-68 was populated at high spin in two experiments using the reaction Ca-40(S-32, 3pn) at beam energies of 105 and 95 MeV. A self-supporting and a gold-backed, highly...

Observation of negative-parity high-spin states of $^{68}$As (2005)

Stefanova, E.A., Lieb, K.P., Stefanescu, I., De Angelis, G., Curien, D., Eberth, J., ...

The neutron-deficient nucleus 68As was populated at high spin in two experiments using the reaction 40Ca(32S, 3pn) at beam energies of 105 and 95 MeV. A self-supporting and a gold-backed, highly...

Observation of negative-parity high-spin states of $^{68}$As (2005)

Stefanova, E.A., Lieb, K.P., Stefanescu, I., De Angelis, G., Curien, D., Eberth, J., ...

The neutron-deficient nucleus 68As was populated at high spin in two experiments using the reaction 40Ca(32S, 3pn) at beam energies of 105 and 95 MeV. A self-supporting and a gold-backed, highly...

Low-noise and Wideband Hot-Electron Superconductive Mixers for THz Frequencies (2004)

Karasik, B., Skalare, A., Wyss, R., McGrath, W., Bumble, B., LeDuc, H., ...

Superconductive hot-electron bolometer (HEB) mixers have been built and tested in the frequency range from 1.1 THz to 2.5 THz.

Submillimeter-wave Spectral Response of Twin Slot Antennas Coupled to Hot Electron Bolometers (2004)

Wyss, R., Neto, A., McGrath, W., Bumble, B., LeDuc, H.

In this study we have measured mixers with a wide range of twin-slot antennas with slot lengths ranging from 26 meu up to 152 meu.

Frequency-controlled sources of far-infrared radiation for spaceborne applications (2004)

Gaidis, M. C., Lee, K. A., Samoska, L., Wyss, R.

In this paper, we address the needs of the FIR space-flight community, providing an introductory-level treatment of the common heterodyne receiver configurations and the state of technology for...

Noise and Bandwidth Measurements of Diffusion-Cooled Nb Hot-Electron Bolometer Mixers at Frequencies Above the Superconductive Energy Gap (2004)

Wyss, R., Karasik, B., McGrath, W., Bumble, B., LeDuc, H.

Diffusion-cooled Nb hot-electron bolometer (HEB) mixers have the potential to simultaneously achieve high intermediate frequency (IF) bandwidths and low mixer noise temperatures for operation at THz...

Enhanced Stability of Superheavy Nuclei Due to High-Spin Isomerism (2004)

Xu, F. R., Zhao, E. G., Wyss, R., Walker, P. M.

Configuration-constrained calculations of potential-energy surfaces in even-even superheavy nuclei reveal systematically the existence at low excitation energies of multiquasiparticle states with...

gamma-ray spectroscopy of Bi-191,Bi-193 (2004)

Juutinen, S, Cocks, JFC, Dorvaux, O, Eskola, K, ...

Prompt and delayed gamma rays from Bi-191,Bi-193 have been identified using the recoil-decay tagging, isomer tagging, and recoil gating techniques, resulting in extensive level schemes for both...

Enhanced Stability of Superheavy Nuclei due to High-Spin Isomerism (2004)

Xu, F. R., Zhao, E. G., Wyss, R., Walker, P. M.

Configuration-constrained calculations of potential-energy surfaces in even-even superheavy nuclei reveal systematically the existence at low excitation energies of multi-quasiparticle states with...

Alpha Decay Hindrance Factors: A Probe of Mean Field Wave Functions (2004)

Karlgren, D., Liotta, R. J., Wyss, R., Huyse, M., Van Duppen, P.

A simple model to calculate alpha-decay Hindrance Factors is presented. Using deformation values obtained from PES calculations as the only input, Hindrance Factors for the alpha-decay of Rn- and...

Enhanced Stability of Superheavy Nuclei Due to High-Spin Isomerism (2004)

Xu, F R, Zhao, E G, Wyss, R, Walker, P M

Configuration-constrained calculations of potential-energy surfaces in even-even superheavy nuclei reveal systematically the existence at low excitation energies of multiquasiparticle states with...

In-beam gamma-ray spectroscopy of Po-190: First observation of a low-lying prolate band in Po isotopes (2003)

Van De Vel, Karen; U0031962, Page, RD, Kettunen, H, Greenlees, PT, Jones, P, ...

Gamma rays from excited states of Po-190 have been observed using I the Jurosphere Ge-detector array coupled to the RITU gas-filled separator. They were associated with a collective band which from...

Four-quasiparticle alignments in Ge-66 (2003)

De Angelis, G, Curien, D, Eberth, J, Farnea, E, ...

The neutron-deficient nucleus Ge-66 was populated at high spin in two experiments using the reaction Ca-40(S-32,alpha2p) at beam energies of 105 and 95 MeV. In the first experiment, a self-supporting...

Four-quasiparticle alignments in Ge-66 (2003)

De Angelis, G, Curien, D, Eberth, J, Farnea, E, ...

Above angular momentum 10(+), we found two positive-parity sequences, connected by energetically staggered DeltaI = 1 M1 transitions. The total Routhian surface calculations predict a strong triaxial...

Cranking in Isospace (2002)

Glowacz, S., Satula, W., Wyss, R.

The response of isovector and isoscalar pairing to generalized rotation in isospace is studied. Analytical expressions for non-selfconsistent solutions for different limiting cases of the model are...

High Spin Proton Emitters in Odd-Odd Nuclei and Shape Changes (2002)

Delion, D. S., Liotta, R. J., Wyss, R.

We present a formalism to describe proton emission from odd-odd nuclei based on a scattering like approach. Special emphasis is given to the case of transitions between states with different...

Comments on the nuclear symmetry energy (2002)

Satula, W., Wyss, R.

According to standard textbooks, the nuclear symmetry energy originates from the {\it kinetic} energy and the {\it interaction} itself. We argue that this view requires certain modifications. We...

The T=0 neutron-proton pairing correlations in the superdeformed rotational bands around 60Zn (2002)

Dobaczewski, J., Dudek, J., Wyss, R.

The superdeformed bands in 58Cu, 59Cu, 60Zn, and 61Zn are analyzed within the frameworks of the Skyrme-Hartree-Fock as well as Strutinsky-Woods-Saxon total routhian surface methods with and without...

In-beam and alpha-decay spectroscopy of Po-191 and evidence for triple shape coexistence at low energy in the daughter nucleus Pb-187 (2002)

Andreyev, Andrei; U0055520, Huyse, Marc; U0013345, Van De Vel, Karen; U0031962, Van Duppen, Pieter; U0010286, Dorvaux, O, Greenlees, P, ...

Prompt gamma rays have been observed for the first time from the neutron-deficient nucleus Po-191 using the recoil-decay tagging technique at the RITU gas-filled separator. In addition improved alpha...

Identification of low-lying proton-based intruder states in Pb189-193 (2002)

Van De Vel, Karen; U0031962, Andreyev, Andrei; U0055520, Huyse, Marc; U0013345, Van Duppen, Pieter; U0010286, Cocks, JFC, Dorvaux, O, ...

Low-lying proton-based intruder states have been observed in the odd-mass isotopes Pb-189,Pb-191,Pb-193 in experiments at the RITU gas-filled recoil separator. The identification has been performed...

Oblate stability of A110 nuclei near the r-process path (2002)

Xu, F. R., Walker, P. M., Wyss, R.

Even-even A ~~ 110 nuclei approaching the astrophysical r-process path have been investigated using both the cranked and the configuration-constrained shell models. The calculations show that, with...

The discovery of a prolate-oblate-spherical shape triple of spin 0(+) states in the atomic nucleus Pb-186 (2001)

Weissman, L, Ackermann, D, Gerl, J, ...

Two excited J(pi)=0(+) states in Pb-186 populated in the a-decay of Po-190 have been identified through alpha -particle/conversion electron coincidences in an experiment at the velocity filter SHIP....

Anomalies in the alpha-decay energies and half-lives of neutron-deficient Po isotopes (2001)

Wyss, R

The transition rates of DeltaL = 0 alpha transitions in them lightest Po isotopes are considerably slower than the transition rates of the heavier ones, even leading to a considerable deviation in...

Rotations in isospace: a doorway to the understanding of neutron-proton superfluidity in N=Z nuclei (2000)

Satuła, W., Wyss, R.

The $T$=2 excitations in even-even $N$=$Z$ nuclei are calculated within the isospin cranked mean-field approach. The response of pairing correlations to rotation in isospace is investigated. It is...

Isovector and isoscalar superfluid phases in rotating nuclei (2000)

Sheikh, J. A., Wyss, R.

The subtle interplay between the two nuclear superfluids, isovector T=1 and isoscalar T=0 phases, are investigated in an exactly soluble model. It is shown that T=1 and T=0 pair-modes decouple in the...

A triplet of differently shaped spin-zero states in the atomic nucleus Pb-186 (2000)

Weissman, L, Ackermann, D, Gerl, J, ...

Understanding the fundamental excitations of many-fermion systems is of significant current interest. In atomic nuclei with even numbers of neutrons and protons, the low-lying excitation spectrum is...

A number projected model with generalized pairing interaction (2000)

Satula, W., Wyss, R.

A mean-field model with a generalized pairing interaction that accounts for neutron-proton pairing is presented. Both the BCS as well as number-projected solutions of the model are presented. For the...

Quadrupole Pairing Interaction and Signature Inversion (1999)

Xu, F. R., Satula, W., Wyss, R.

The signature inversion in the \pi h11/2 \otimes \nu h11/2 rotational bands of odd-odd Cs and La isotopes and the \pi h11/2 \otimes \nu i13/2 bands of odd-odd Tb, Ho and Tm nuclei is investigated...

T=0 Neutron-Proton Correlations at High Angular Momenta (1999)

Wyss, R.

The properties of T=0 neutron-proton correlations are discussed within the frame work of different model calculations. Single-j shell calculations reveal that the T=0 correlations remain up to the...

Mean-field and blocking effects on odd-even mass differences and rotational motion of nuclei (1999)

Xu, F. R., Wyss, R., Walker, P. M.

The odd-even differences of nuclear masses are strongly influenced by mean-field and odd-nucleon blocking effects. When such effects are taken into account, the determination of the pairing...

Shape and blocking effects on odd-even mass differences and rotational motion of nuclei (1999)

Xu, F. R., Wyss, R., Walker, P. M.

Nuclear shapes and odd-nucleon blockings strongly influence the odd-even differences of nuclear masses. When such effects are taken into account, the determination of the pairing strength is modified...

Hindered (Delta l=0) alpha decay and shape staggering in Po-191 (1999)

Cocks, JFC, Helariutta, K, Kettunen, H, ...

Two alpha-decaying isomeric states were observed in Po-191 with E-alpha = 7334(10) keV and T-1/2 = 22(1) ms for Po-191g and E-alpha = 7378(10) keV and T-1/2 = 98(8) ms for Po-191m. Evidence was found...

Shape coexistence in the light Po isotopes (1998)

Oros, A M, Heyde, Kris L G, De Coster, C, Decroix, B, Wyss, R, Barrett, Bruce R, ...

The systematics of the even light Po isotopes (N$\le$126) are studied in theframework of the Particle-Core Model. The strong perturbation of thesystematics in the very light isotopes is interpreted...

Onset of T=0 Pairing and Deformations in High Spin States of the N=Z Nucleus 48Cr (1998)

Terasaki, J., Wyss, R.

The yrast line of the N=Z nucleus 48Cr is studied up to high spins by means of the cranked Hartree-Fock-Bogoliubov method including the T=0 and T=1 isospin pairing channels. A Skyrme force is used in...

Competition Between T=0 and T=1 Pairing in Proton-Rich Nuclei (1996)

Satuła, W., Wyss, R.

A cranked mean-field model with two-body T=1 and T=0 pairing interactions is presented. Approximate projection onto good particle-number is enforced via an extended Lipkin-Nogami scheme. Our...

Pharmacokinetics of cefetamet (Ro 15-8074) and cefetamet pivoxil (Ro 15-8075) after intravenous and oral doses in humans.

Koup, J R, Dubach, U C, Brandt, R, Wyss, R, Stoeckel, K

This report summarizes the results of three pharmacokinetic studies of cefetamet and cefetamet pivoxil conducted in normal adult male volunteers. In the first study the pharmacokinetics of cefetamet...

Continuous synthesis of two protein-kinase-C-related proteins after down-regulation by phorbol esters.

Borner, C, Eppenberger, U, Wyss, R, Fabbro, D

The phorbol 12-myristate 13-acetate (PMA)-dependent down-regulation of immunoprecipitable protein kinase C was studied in human breast cancer cell lines that display different growth inhibitions...

Altered protein kinase C in a mast cell variant defective in exocytosis.

Mazurek, N, Regazzi, R, Borner, C, Wyss, R, Conscience, J F, Erne, P, ...

The murine mast cell line PB-3c is dependent on interleukin 3 (IL-3) with respect to survival and proliferation. These cells also require IL-3 to display antigen-mediated serotonin release, which is...

Pharmacokinetics of cefetamet (Ro 15-8074) and cefetamet pivoxil (Ro 15-8075) after intravenous and oral doses in humans.

Koup, J R, Dubach, U C, Brandt, R, Wyss, R, Stoeckel, K

This report summarizes the results of three pharmacokinetic studies of cefetamet and cefetamet pivoxil conducted in normal adult male volunteers. In the first study the pharmacokinetics of cefetamet...

Continuous synthesis of two protein-kinase-C-related proteins after down-regulation by phorbol esters.

Borner, C, Eppenberger, U, Wyss, R, Fabbro, D

The phorbol 12-myristate 13-acetate (PMA)-dependent down-regulation of immunoprecipitable protein kinase C was studied in human breast cancer cell lines that display different growth inhibitions...

Altered protein kinase C in a mast cell variant defective in exocytosis.

Mazurek, N, Regazzi, R, Borner, C, Wyss, R, Conscience, J F, Erne, P, ...

The murine mast cell line PB-3c is dependent on interleukin 3 (IL-3) with respect to survival and proliferation. These cells also require IL-3 to display antigen-mediated serotonin release, which is...