Zobrazeno 1 - 10 of 52 pro vyhledávání: '"J G Hirsch"'
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Akademický článek
Quantum vs classical dynamics in a spin-boson system: manifestations of spectral correlations and scarring
Autor: D Villaseñor, S Pilatowsky-Cameo, M A Bastarrachea-Magnani, S Lerma-Hernández, L F Santos, J G Hirsch
Publikováno v: New Journal of Physics, Vol 22, Iss 6, p 063036 (2020)
We compare the entire classical and quantum evolutions of the Dicke model in its regular and chaotic domains. This is a paradigmatic interacting spin-boson model of great experimental interest. By studying the classical and quantum survival probabili
Externí odkaz: https://doaj.org/article/c9da06115fe24e7a8d12272a69c9c69a
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3
Neutron-Proton Pairing and its Impact on Gamow-Teller Transitions
Autor: S. Pittel, A. Carranza M., J. G. Hirsch
Publikováno v: Journal of Physics: Conference Series. 1610:012012
We report a systematic study of Gamow-Teller (GT) transitions in the 2p1f shell, using the nuclear shell model with a schematic Hamiltonian. The Hamiltonian used contains a quadrupole-quadrupole interaction, isoscalar (T = 0) and isovector (T = 1) pa
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a703ee68d852258ffafc93ce0282650d
https://doi.org/10.1088/1742-6596/1610/1/012012
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4
Deviations from the diffusion tensor model as revealed by contour plot visualization using high angular resolution diffusion-weighted imaging (HARDI)
Autor: Michael G. Hennerici, Christina Rossmanith, Stefanie M. Schwenk, Achim Gass, J G Hirsch
Publikováno v: Magnetic Resonance Materials in Physics, Biology and Medicine. 16:93-102
The standard diffusion tensor model is limited in its ability to provide detailed information about multidirectional fiber architecture in human white matter. Additional directional acquisition of diffusivity properties with high angular resolution d
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::26dfc039a2e9c0d1118fa6945bbbc033
https://doi.org/10.1007/s10334-003-0011-y
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5
Combined MR measurements of magnetization transfer, tissue diffusion and proton spectroscopy. A feasibility study with neurological cases
Autor: Regina Möckel, Tobias Back, Michael G. Hennerici, Wolfgang H. Oertel, J. Gaa, J G Hirsch, Achim Gass
Publikováno v: Neurological Research. 25:292-300
Magnetic resonance imaging (MRI) of diffusion and magnetization transfer was combined with 1H-spectroscopic imaging (CSI) to evaluate the clinical potential of in-vivo profiles of various brain pathologies. Ten patients (multiple sclerosis, cerebrova
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f7648f98228d247dc9540b345baed601
https://doi.org/10.1179/016164103101201373
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6
Echoplanare diffusionsgewichtete MRT in der Diagnostik des akuten ischämischen Schlaganfalls
Autor: J G Hirsch, Achim Gass, A. Sommer, Michael G. Hennerici, A. Schwartz, Max Georgi, J. Gaa
Publikováno v: Der Radiologe. 39:695-702
In den ersten Stunden nach zerebraler Ischamie ist eine exakte Diagnosestellung haufig schwierig. Die diffusionsgewichtete (DW) Magnetresonanztomographie (MRT) ermoglicht die bildliche Darstellung betroffener Parenchymanteile und quantitative Erfassu
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9e6929cdaefecd6624d1e04be92ff5a1
https://doi.org/10.1007/s001170050567
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7
M1 strengths in deformed nuclei
Autor: J. G. Hirsch, T. Beuschel, Jerry P. Draayer
Publikováno v: Journal of Physics G: Nuclear and Particle Physics. 25:605-610
The Elliott SU(3) model, extended via pseudo-spin for heavy nuclei, is used to study low-lying magnetic dipole excitations in deformed nuclei. Proton and neutron degrees of freedom are handled explicitly and the system Hamiltonian includes single-par
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::927b60ec7fc2ee25b9fd7a8a5c2a1b03
https://doi.org/10.1088/0954-3899/25/4/006
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8
[Untitled]
Autor: Peter O. Hess, J. G. Hirsch, Osvaldo Civitarese
Publikováno v: Czechoslovak Journal of Physics. 48:167-172
The microscopic description of nuclear double beta decay transitions is presented in the framework of a schematic model. The comparison between these results and the ones corresponding to realistic calculations shows that the physics of the double be
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b32dc990b0f408edab0f249504c26097
https://doi.org/10.1023/a:1021259707401
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9
[Untitled]
Autor: Peter O. Hess, Jerry P. Draayer, Octavio Castaños, D. Troltenier, J. G. Hirsch, D. Rompf, Osvaldo Civitarese, T. Beuschel, Yang Sun
Publikováno v: Czechoslovak Journal of Physics. 48:183-190
The pseudo SU(3) model is shown to be a powerful scheme for describing the excitation spectra as well asB(E2) andB(M1) transition strengths in heavy deformed nuclei. It is also useful for describing double beta decay amplitudes for transitions from t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c41802761efb9f9221e69f3084b643e7
https://doi.org/10.1023/a:1021215925148
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10
Correlations between the quadrupole deformation, B(E2; 01 → 21) value, and total GT+ strength
Autor: J. G. Hirsch, D. Troltenier, Jerry P. Draayer
Publikováno v: Nuclear Physics A. 601:89-102
This study investigates the effect of four interactions on the ground-state quadrupole deformation, (β, γ); B (E2; 0 1 → 2 1 ) value; and total Gamow-Teller transition strength, GT + . Three of the four terms are typical of a SU(3) theory, namely
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::46bdd4b11e09719a327e65f5401f0044
https://doi.org/10.1016/0375-9474(96)00092-9
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