Publications (130)
Cluster Model for Near-barrier Fusion Induced by Weakly Bound and Halo Nuclei
C. Beck, N. Keeley, A. Diaz-Torres
The influence on the fusion process of coupling transfer/breakup channels is investigated for the medium weight Li+Co systems in the vicinity of the Coulomb barrier.…
Stray-light contamination and spatial deconvolution of slit-spectrograph observations
C. Beck, R. Rezaei, D. Fabbian
Stray light caused by scattering on optical surfaces and in the Earth's atmosphere degrades the spatial resolution of observations. We study the contribution of stray light to the…
Spectroscopy at the solar limb: I. Average off-limb profiles and Doppler shifts of Ca II H
C. Beck, R. Rezaei
We present constraints on the structure of the chromosphere from observations of the Ca II H line profile near and off the solar limb. We obtained a data set of the Ca II H line in…
Characterization of fragment emission in ^{20}Ne (7 - 10 MeV/nucleon) + ^{12}C reactions
Aparajita Dey, C. Bhattacharya, S. Bhattacharya +14
The inclusive energy distributions of the complex fragments (3 Z 7) emitted from the bombardment of ^{12}C by ^{20}Ne beams with incident energies between 145 and 200…
The Chromospheric Telescope
C. Bethge, H. Peter, T. J. Kentischer +3
We introduce the Chromospheric Telescope (ChroTel) at the Observatorio del Teide in Izana on Tenerife as a new multi-wavelength imaging telescope for full-disk synoptic observation…
Molecular resonance phenomena and alpha-clustering: recent progress and perspectives
C. Beck
The connection between molecular resonance phenomena in light heavy-ion collisions, alpha-clustering and extremely deformed states in light -like nuclei is discussed. For examp…
Near-barrier Fusion and Transfer/Breakup induced by Weakly Bound and Exotic Halo Nuclei
C. Beck
This submission has been withdrawn by arXiv administrators because it is a duplicate of nucl-th/0610004.
Magneto-acoustic waves in sunspots from observations and numerical simulations
T. Felipe, E. Khomenko, M. Collados +1
We study the propagation of waves from the photosphere to the chromosphere of sunspots. From time series of cospatial Ca II H (including its line blends) intensity spectra and pola…
Dynamical cluster-decay model for hot and rotating light-mass nuclear systems, applied to low-energy S + Mg Ni reaction
Raj K. Gupta, M. Balasubramaniam, Rajesh Kumar +3
The dynamical cluster-decay model (DCM) is developed further for the decay of hot and rotating compound nuclei (CN) formed in light heavy-ion reactions. The model is worked out in…
Siphon flow in a cool magnetic loop
C. Bethge, C. Beck, H. Peter +1
We investigate the properties of a structure in the solar chromosphere in an active region to find out whether the feature is consistent with a siphon flow in a magnetic loop fille…
Binary Decay of Light Nuclear Systems
S. J. Sanders, A. Szanto de Toledo, C. Beck
A review of the characteristic features found in fully energy-damped, binarydecay yields from light heavy-ion reactions with is presente…
Search for emission of unstable Be clusters from hot Ca and Ni nuclei
M. Rousseau, C. Beck, C. Bhattacharya +14
The possible occurence of highly deformed configurations is investigated in the Ca and Ni di-nuclear systems as formed in the Si + C and Si + $^{…
Clusters in light stable and exotic nuclei
C. Beck
Since the discovery of molecular resonances in C+C in the early sixties a great deal of research work has been undertaken to study alpha-clustering. Our knowledge on…
Evidence for a Novel Reaction Mechanism of a Prompt Shock-Induced Fission Following the Fusion of 78Kr and 40Ca Nuclei at E/A =10 MeV
E. Henry, J. Toke, S. Nyibule +40
An analysis of experimental data from the inverse-kinematics ISODEC experiment on 78Kr+40Ca reaction at a bombarding energy of 10 AMeV has revealed signatures of a hitherto unknown…
Search for 12C+12C molecule in 24Mg* populated by 24Mg+12C
C. Beck, A. Sanchez i Zafra, F. Haas +20
The gamma-decay properties of 24Mg excited states are investigated in the inverse reaction 24Mg+12C at E(24Mg) = 130 MeV. At this energy the direct inelastic scattering populates a…
On the inhomogeneities of the sunspot penumbra
R. Schlichenmaier, D. A. N. Mueller, C. Beck
The penumbra is ideally suited to challenge our understanding of magnetohydrodynamics. The energy transport takes place as magnetoconvection in inclined magnetic fields under the e…
Properties of a Decaying Sunspot
H. Balthasar, C. Beck, P. Gömöry +4
A small decaying sunspot was observed with the Vacuum Tower Telescope (VTT) on Tenerife and the Japanese Hinode satellite. We obtained full Stokes scans in several wavelengths cove…
Can spicules be detected at disc centre in broad-band Ca II H filter imaging data ?
C. Beck, R. Rezaei, K. G. Puschmann
We estimate the formation height range contributing to broad-band and narrow-band filter imaging data in Ca II H to investigate whether spicules can be detected in such observation…
Multi-layer study of wave propagation in sunspots
T. Felipe, E. Khomenko, M. Collados +1
We analyze the propagation of waves in sunspots from the photosphere to the chromosphere using time series of co-spatial Ca II H intensity spectra (including its line blends) and p…
Transfer/Breakup Channel Couplings in Sub-barrier Fusion Reactions
C. Beck
With the recent availability of state-of-the-art radioactive ion beams, there has been a renew interest in the investigation of nuclear reactions with heavy ions near the Coulomb b…
The polarization signature of photospheric magnetic fields in 3D MHD simulations and observations at disk center
C. Beck, D. Fabbian, R. Rezaei +1
Before using 3D MHD simulations of the solar photosphere in the determination of elemental abundances, one has to ensure that the correct amount of magnetic flux is present in the…
Fast Inversion of Solar Ca II Spectra in Non-Local Thermodynamic Equilibrium
C. Beck, S. Gosain, C. Kiessner
Present day solar imaging spectrometers typically yield a few hundred million spectra in one hour of observing time. This number will increase by an order of magnitude for future i…
Temporal evolution of the Evershed flow in sunspots. I. Observational characterization of Evershed clouds
D. Cabrera Solana, L. R. Bellot Rubio, C. Beck +1
[Abridged] The magnetic and kinematic properties of the photospheric Evershed flow are relatively well known, but we are still far from a complete understanding of its nature. The…
Near-barrier Fusion Induced by Stable Weakly Bound and Exotic Halo Light Nuclei
C. Beck, A. Sanchez i Zafra, A. Diaz-Torres +3
The effect of breakup is investigated for the medium weight Li+Co system in the vicinity of the Coulomb barrier. The strong coupling of breakup/transfer channels to fu…
The energy of waves in the photosphere and lower chromosphere: 1. Velocity statistics
C. Beck, E. Khomenko, R. Rezaei +1
Acoustic waves are one of the primary suspects besides magnetic fields for the chromospheric heating process to temperatures above radiative equilibrium (RE). We derived the mechan…
Inferring telescope polarization properties through spectral lines without linear polarization
A. Derks, C. Beck, V. Martinez Pillet
We present a technique to determine the polarization properties of a telescope through observations of spectral lines that have no intrinsic linear polarization signals. For such s…
Spin-Alignment and Quasi-Molecular Resonances in Heavy-Ion Collision
R. Nouicer, C. Beck, S. J. Sanders +4
Fragment-fragment- triple coincidence measurements of the Si~~Si reaction at E~=~55.8 MeV, carefully chosen to populate a well known quasi-molecul…
The signature of chromospheric heating in Ca II H spectra
C. Beck, W. Schmidt, R. Rezaei +1
We analyze a 1-hour time series of Ca II H intensity spectra and polarimetric spectra around 630 nm to derive the signature of the chromospheric heating and to investigate its rela…
Search for extremely deformed fission fragment in ^{28}Si+^{28}Si with Eurogam Phase II
C. Beck, R. Nouicer, ; S. J. Sanders +2
A high-resolution study of fragment-fragment- triple coincident measurements of the symmetric-mass fission exit-channel from the ^{28}Si+^{28}Si reaction has been performed at…
The GREGOR Fabry-Pérot Interferometer
K. G. Puschmann, C. Denker, F. Kneer +18
The GREGOR Fabry-Pérot Interferometer (GFPI) is one of three first-light instruments of the German 1.5-meter GREGOR solar telescope at the Observatorio del Teide, Tenerife, Spain.…
Cluster Emission of Be in the Si+C Fusion Reaction at Low Temperature
M. Rousseau, C. Beck, C. Bhattacharya +6
Inclusive as well as exclusive energy spectra of the light charged particles emitted in the Si (=112.6 MeV) + C reaction has been measured using the {\bf ICA…
The magnetic topology of the inverse Evershed flow
A. Prasad, M. Ranganathan, C. Beck +2
The inverse Evershed flow (IEF) is a mass motion towards sunspots at chromospheric heights. We combined high-resolution observations of NOAA 12418 from the Dunn Solar Telescope and…
C+O sub-barrier radiative capture cross-section measurements
A. Goasduff, S. Courtin, F. Haas +11
We have performed a heavy ion radiative capture reaction between two light heavy ions, C and O, leading to Si. The present experiment has been performed below…
Magnetic properties of G-band bright points in a sunspot moat
C. Beck, L. R. Bellot Rubio, R. Schlichenmaier +1
We present simultaneous spectropolarimetric observations of four visible and three infrared spectral lines from the VTT (Tenerife), together with speckle-reconstructed filtergrams…
Nucleon-Nucleon and Pion-Nucleon Potentials from Phase Shifts using Quantum Inversion
M. Sander, C. Beck, B. C. Schroeder +6
NN and Pi-N partial wave radial potentials have been generated using the latest SM94-VPI(NN) and FA93-VPI(Pi-N) phase shifts. The potentials are used to determine the deuteron prop…
Clustering in stable and exotic nuclei
C. Beck
Since the pioneering discovery of molecular resonances in the 12C+12C reaction more than half a century ago a great deal of research work has been undertaken in alpha clustering. O…
Competition between quasi-molecular resonances and fusion-fission in light dinuclear systems
C. Beck
The results presented in this paper clearly suggest that a coherent framework may exist which connects the topics of heavy-ion molecular resonances, hyperdeformation effects, and f…
Coupled-channels effects in elastic scattering and near-barrier fusion induced by weakly bound nuclei and exotic halo nuclei
C. Beck, N. Keeley, A. Diaz-Torres
The influence on fusion of coupling to the breakup process is investigated for reactions where at least one of the colliding nuclei has a sufficiently low binding energy for breaku…
Highly deformed Ca configurations in Si + C
M. Rousseau, C. Beck, C. Bhattacharya +16
The possible occurrence of highly deformed configurations in the Ca di-nuclear system formed in the Si + C reaction is investigated by analyzing the spectra of…
Linear wavelength correlation matrices of photospheric and chromospheric spectral lines: 1. Observations vs. modeling
C. Beck, W. Rammacher
We investigate the linear correlation coefficient between the intensities at different wavelengths in photospheric and chromospheric spectral lines. Waves that propagate vertically…
Vanishing spin alignment : experimental indication of triaxial nuclear molecule
R. Nouicer, C. Beck, S. J. Sanders +2
Fragment-fragment- coincidences have been measured for at an energy corresponding to the population of a conjectured resonance in Ni. Fragment…
Thermodynamic fluctuations in solar photospheric three-dimensional convection simulations and observations
C. Beck, D. Fabbian, F. Moreno-Insertis +2
Numerical 3D radiative (M)HD simulations of solar convection are used to understand the physical properties of the solar photosphere. To validate this approach, it is important to…
Fission and cluster decay of Sr nucleus in the ground-state and formed in heavy-ion reactions
R. K. Gupta, M. K. Sharma, S. Singh +2
Calculations for fission and cluster decay of are presented for this nucleus to be in its ground-state or formed as an excited compound system in heavy-ion reactions. The…
Multi-neutron transfer coupling in sub-barrier 32S+90,96Zr fusion reactions
A. Richard, C. Beck, H. Q. Zhang
The role of neutron transfers is investigated in the fusion process below the Coulomb barrier by analyzing 32S+90Zr and 32S+96Zr as benchmark reactions. A full coupled-channel calc…
Reaction mechanisms for weakly-bound, stable nuclei and unstable, halo nuclei on medium-mass targets
C. Beck, N. Rowley, P. Papka +13
An experimental overview of reactions induced by the stable, but weakly-bound nuclei 6Li, 7Li and 9Be, and by the exotic, halo nuclei 6He, 8B, 11Be and 17F on medium-mass targets,…
Study of Deformation Effects in the Charged Particle Emission from 46Ti
M. Brekiesz, P. Papka, A. Maj +13
The 46Ti compound nucleus, as populated by the fusion-evaporation reaction 27Al + 19F at the bombarding energy of 144 MeV, has been investigated by charged particle spectroscopy us…
Spectro-polarimetric Imaging Reveals Helical Magnetic Fields in Solar Prominence Feet
M. J. Martinez Gonzalez, R. Manso Sainz, A. Asensio Ramos +3
Solar prominences are clouds of cool plasma levitating above the solar surface and insulated from the million-degree corona by magnetic fields. They form in regions of complex magn…
Clustering effects induced by light nuclei
C. Beck
Since the pioneering discovery, half a century ago, of 12C+12C molecular resonances, a great deal of research work has been undertaken in theSince the pioneering discovery, half a…
The Magnetic Response of the Solar Atmosphere to Umbral Flashes
S. J. Houston, D. B. Jess, A. Asensio Ramos +4
Chromospheric observations of sunspot umbrae offer an exceptional view of magneto-acoustic shock phenomena and the impact they have on the surrounding magnetically-dominated plasma…
Binary reaction decays from 24Mg+12C
C. Beck, P. Papka, A. Sanchez i Zafra +21
Charged particle and gamma decays in 24Mg* are investigated for excitation energies where quasimolecular resonances appear in 12C+12C collisions. Various theoretical predictions fo…
Alpha-Cluster States Populated in 24Mg+12C
C. Beck
Charged particle and gamma decays in light alpha-like nuclei are investigated for 24Mg+12C. Various theoretical predictions for the occurence of superdeformed and hyperdeformed ban…
8Be cluster emission versus alpha evaporation in 28Si + 12C
M. Rousseau, C. Beck, C. Bhattacharya +11
The possible occurence of highly deformed configurations in the Ca di-nuclear system formed in the Si + C reaction is investigated by analyzing the spectra of…
Cl+C Asymmetrical fission excitation functions
C. Beck, D. Mahboub, R. Nouicer +17
The fully energy-damped yields from the Cl+C reaction have been systematically investigated using particle-particle coincidence techniques at a Cl bombarding e…
Deformation effects in the Si+C and Si+Si reaction Search
C. Bhattacharya, M. Rousseau, C. Beck +13
The possible occurence of highly deformed configurations is investigated in the Ca and Ni di-nuclear systems as formed in the Si+C,Si reactions b…
How does breakup influence near-barrier fusion of weakly bound light nuclei ?
C. Beck, N. Rowley, M. Rousseau +24
The influence on the fusion process of coupling to collective degrees of freedom has been explored. The significant enhancement of he fusion cross setion at sub-barrier energies wa…
Application of speckle and (multi-object) multi-frame blind deconvolution techniques on imaging and imaging spectropolarimetric data
K. G. Puschmann, C. Beck
We test the effects of reconstruction techniques on 2D data to determine the best approach. We obtained a time-series of spectropolarimetric data in the Fe I line at 630.25 nm with…
Magnetic loop emergence within a granule
P. Gömöry, C. Beck, H. Balthasar +4
We investigate the temporal evolution of magnetic flux emerging within a granule in the quiet-Sun internetwork at disk center. We combined IR spectropolarimetry performed in two Fe…
Correlation functions and emission time sequence of light charged particles from projectile-like fragment source in E/A = 44 and 77 MeV 40Ar + 27Al collisions
R. Ghetti, J. Helgesson, G. Lanzano' +13
Two-particle correlation functions, involving protons, deuterons, tritons, and alpha-particles, have been measured at very forward angles (0.7 deg < theta_lab < 7 deg), in order to…
Molecular structures and clustering effects in reactions induced by light nuclei
C. Beck
-clustering study since the pioneering discovery of C+C molecular resonances half a century ago. Our knowledge on physics of nuclear molecules has increased consi…
Two-dimensional solar spectropolarimetry with the KIS/IAA Visible Imaging Polarimeter
C. Beck, L. R. Bellot Rubio, T. J. Kentischer +2
Spectropolarimetry at high spatial and spectral resolution is a basic tool to characterize the magnetic properties of the solar atmosphere. We introduce the KIS/IAA Visible Imaging…
Center-to-Limb Variation of the Inverse Evershed Flow
C. Beck, D. P. Choudhary, M. Ranganathan
We present the properties of the inverse Evershed flow (IEF) based on the center-to-limb variation of the plasma speed and loop geometry of chromospheric superpenumbral fibrils in…
Deformation effects in Ni nuclei produced in Si+Si at 112 MeV
C. Bhattacharya, M. Rousseau, C. Beck +11
Velocity and energy spectra of the light charged particles (protons and -particles) emitted in the Si(E = 112 MeV) + Si reaction have been measured at the…
A three-dimensional view of the thermal structure in a super-penumbral canopy
C. Beck, D. Prasad Choudhary, R. Rezaei
We investigate the thermal topology in a super-penumbral canopy by determining the 3D thermal structure of an active region. We derive the temperature stratifications in the active…
Clusters in Light Nuclei
C. Beck, P. Papka, A. Sanchez i Zafra +29
A great deal of research work has been undertaken in the alpha-clustering study since the pioneering discovery, half a century ago, of 12C+12C molecular resonances. Our knowledge o…
Survival of orbiting in Ne (7 - 10 MeV/nucleon) + C reactions
C. Bhattacharya, A. Dey, S. Kundu +15
The inclusive energy distributions of fragments with Z 3 emitted from the bombardment of C by Ne beams with incident energies between 145 and 200 MeV have been…
The multi-component field topology of sunspot penumbrae - A diagnostic tool for spectropolarimetric measurements
D. A. N. Mueller, R. Schlichenmaier, G. Fritz +1
Context: Sunspot penumbrae harbor highly structured magnetic fields and flows. The moving flux tube model offers an explanation for several observed phenomena, e.g. the Evershed ef…
Superstatistical generalization of the work fluctuation theorem
C. Beck, E. G. D. Cohen
We derive a generalized version of the work fluctuation theorem for nonequilibrium systems with spatio-temporal temperature fluctuations. For chi-square distributed inverse tempera…
Present status of nuclear cluster physics and experimental perspectives
C. Beck
Knowledge on nuclear cluster physics has increased considerably as nuclear clustering remains one of the most fruitful domains of nuclear physics, facing some of the greatest chall…
How does breakup influence the total fusion of Li at the Coulomb barrier?
A. Diaz-Torres, I. J. Thompson, C. Beck
Total (complete + incomplete) fusion excitation functions of Li on Co and Bi targets around the Coulomb barrier are obtained using a new continuum discretize…
Superstatistics
C. Beck, E. G. D. Cohen
We consider nonequilibrium systems with complex dynamics in stationary states with large fluctuations of intensive quantities (e.g. the temperature, chemical potential, or energy d…
Spectroscopy at the solar limb: II. Are spicules heated to coronal temperatures ?
C. Beck, R. Rezaei, K. G. Puschmann +1
Spicules of the so-called type II were suggested to be relevant for coronal heating because of their ubiquity on the solar surface and their eventual extension into the corona. We…
Nuclear alpha-clustering, superdeformation, and molecular resonances
C. Beck
Nuclear alpha-clustering has been the subject of intense study since the advent of heavy-ion accelerators. Looking back for more than 40 years we are able today to see the connecti…
Collective clusterization effects in light heavy ion reactions
Raj K. Gupta, M. Balasubramaniam, Rajesh Kumar +2
The collective clusterization process, proposed for intermediate mass fragments (IMFs, 4A28, 2Z14) emitted from the hot and rotating compound nuclei formed in low e…
Alfvén Wave Dissipation in the Solar Chromosphere
S. D. T. Grant, D. B. Jess, T. V. Zaqarashvili +7
Magneto-hydrodynamic (MHD) Alfvén waves have been a focus of laboratory plasma physics and astrophysics for over half a century. Their unique nature makes them ideal energy transp…
Temporal Evolution of the Inverse Evershed Flow
C. Beck, D. P. Choudhary
The inverse Evershed flow (IEF) is an inflow of material into the penumbra of sunspots in the solar chromosphere that occurs along dark, elongated superpenumbral fibrils extending…
Unveiling the True Nature of Plasma Dynamics from the Reference Frame of a Super-penumbral Fibril
W. Bate, D. B. Jess, S. D. T. Grant +11
The magnetic geometry of the solar atmosphere, combined with projection effects, makes it difficult to accurately map the propagation of ubiquitous waves in fibrillar structures. T…
Evershed clouds as precursors of moving magnetic features around sunspots
D. Cabrera Solana, L. R. Bellot Rubio, C. Beck +1
The relation between the Evershed flow and moving magnetic features (MMFs) is studied using high-cadence, simultaneous spectropolarimetric measurements of a sunspot in visible (630…
Internetwork magnetic field distribution from simultaneous 1.56 micron and 630 nm observations
M. J. Martinez Gonzalez, M. Collados, B. Ruiz Cobo +1
We study the contradictory magnetic field strength distributions retrieved from independent analyses of spectropolarimetric observations in the near-infrared (1.56 micron) and in t…
Extended Hauser-Feshbach Method for Statistical Binary-Decay of Light-Mass Systems
T. Matsuse, C. Beck, R. Nouicer +1
An Extended Hauser-Feshbach Method (EHFM) is developed for light heavy-ion fusion reactions in order to provide a detailed analysis of all the possible decay channels by including…
Temporal evolution of magnetic elements
R. Rezaei, R. Schlichenmaier, W. Schmidt +1
We study the structure and evolution of the magnetic field of the quiet Sun by investigating weak spectro-polarimetric signals. To this end, we observed a quiet region close to the…
Fast inversion of solar Ca II spectra
C. Beck, D. Prasad Choudhary, R. Rezaei +1
We present a fast (<< 1 s per profile) inversion code for solar Ca II lines. The code uses an archive of spectra that are synthesized prior to the inversion under the assumption of…
The energy of waves in the photosphere and lower chromosphere: IV. Inversion results of Ca II H spectra
C. Beck, R. Rezaei, K. G. Puschmann
Most static 1D atmosphere models in the quiet Sun predict a rise of the gas temperature at chromospheric layers, but numerical simulations only yield an increase in the brightness…
Entrance-channel Mass-asymmetry Dependence of Compound-nucleus Formation Time in Light Heavy-ion Reactions
A. Szanto de Toledo, B. V. Carlson, C. Beck +1
The entrance-channel mass-asymmetry dependence of the compound nucleus formation time in light heavy-ion reactions has been investigated within the framework of semiclassical dissi…
On the magnetism and dynamics of prominence legs hosting tornadoes
M. J. Martinez Gonzalez, A. Asensio Ramos, I. Arregui +3
Solar tornadoes are dark vertical filamentary structures observed in the extreme ultraviolet associated with prominence legs and filament barbs. Their true nature and relationship…
The population of deformed bands in Cr by emission of Be from the S + Mg reaction
S. Thummerer, W. von Oertzen, B. Gebauer +5
Using particle- coincidences we have studied the population of final states after the emission of 2 -particles and of Be in nuclei formed in S+Mg reacti…
Recent Experimental Results on Nuclear Cluster Physics
C. Beck
Knowledge on nuclear cluster physics has increased considerably since the pioneering discovery of 12C+12C resonances half a century ago and nuclear clustering remains one of the mo…
Sub-barrier fusion of 32S+90,96Zr: semi-classical coupled-channels approach
H. Q. Zhang, C. J. Lin, F. Yang +8
The fusion excitation functions have been measured with rather good accuracy for 32S+90Zr and 32S+96Zr near and below the Coulomb barrier. The sub-barrier cross sections for 32S+96…
A 3-D sunspot model derived from an inversion of spectropolarimetric observations and its implications for the penumbral heating
C. Beck
I deduced a 3-D sunspot model that is in agreement with spectropolarimetric observations, to address the question of penumbral heating by the repetitive rise of flow channels. I pe…
A Peculiar Velocity Pattern in and near the Leading Sunspot of NOAA 10781: Wave Refraction by Large-Scale Magnetic Fields?
C. Beck
I report observations of unusually strong photospheric and chromospheric velocity oscillations in and near the leading sunspot of NOAA 10781 on 03 July 2005. I investigate an impin…
From the stable to the exotic: clustering in light nuclei
C. Beck
A great deal of research work has been undertaken in alpha-clustering study since the pioneering discovery of 12C+12C molecular resonances half a century ago. Our knowledge on phys…
Decay of excited nuclei produced in Kr + Ca reactions at 5.5 MeV/nucleon
G. Ademard, J. P. Wieleczko, J. Gomez Del Campo +27
Decay modes of excited nuclei are investigated in Kr + Ca reactions at 5.5 MeV/nucleon. Charged products were measured by means of the INDRA array. Kinetic-e…
Deformation Effects in Hot Rotating 46Ti Probed by the Charged Particle Emission and GDR gamma-Decay
M. Brekiesz, A. Maj, M. Kmiecik +12
The 46Ti* compound nucleus, as populated by the fusion-evaporation reaction 27Al+19F at the bombarding energy of E_lab=144 MeV, has been investigated by charged particle spectrosco…
Reaction mechanisms in 24Mg+12C and 32S+24Mg
C. Beck, A. Sanchez i Zafra, P. Papka +20
The occurence of "exotic" shapes in light N=Z alpha-like nuclei is investigated for 24Mg+12C and 32S+24Mg. Various approaches of superdeformed and hyperdeformed bands associated wi…
Coupled-Channel Effects in Collisions between Heavy Ions near the Coulomb Barrier
C. Beck
With the recent availability of state-of-the-art heavy-ion stable and radioactive beams, there has been a renew interest in the investigation of nuclear reactions with heavy ions.…
High-resolution Observations of Halpha Spectra with a Subtractive Double Pass
C. Beck, R. Rezaei, D. Prasad Choudhary +3
High-resolution imaging spectroscopy in solar physics has relied on Fabry-Perot Interferometers (FPIs) in recent years. FPI systems, however, get technically challenging and expens…
Reaction mechanisms in the 6Li+59Co system
F. A . Souza, C. Beck, N. Carlin +8
The reactions induced by the weakly bound 6Li projectile interacting with the intermediate mass target 59Co were investigated. Light charged particles singles and - coincide…
Nuclear astrophysics with radioactive ions at FAIR
R. Reifarth, S. Altstadt, K. Göbel +317
The nucleosynthesis of elements beyond iron is dominated by neutron captures in the s and r processes. However, 32 stable, proton-rich isotopes cannot be formed during those proces…
Derivation and Application of a Scaling Between Hinode/SP and SDO/HMI Vector Magnetic Fields to Improve Magnetic Field Extrapolations
C. Beck, A. Prasad, Q. Hu +3
Full-disk measurements of the solar magnetic field by the Helioseismic and Magnetic Imager (HMI) are often used for magnetic field extrapolations, but its limited spatial and spect…
Influence of Neutron Enrichment on Disintegration Modes of Compound Nuclei
E. Bonnet, J. P. Wieleczko, A. Chbihi +27
Cross sections, kinetic energy and angular distributions of fragments with charge 6Z28 emitted in 78,82Kr+40C at 5.5 MeV/A reactions were measured at the GANIL facility u…
The energy of waves in the photosphere and lower chromosphere: III. Inversion setup for Ca II H spectra in local thermal equilibrium
C. Beck, R. Rezaei, K. G. Puschmann
The Ca II H line is one of the strongest lines in the solar spectrum and provides continuous information on the solar atmosphere from the photosphere to the lower chromosphere. We…