Publications (50)
Cluster Model For Reactions Induced By Weakly Bound And/Or Exotic Halo Nuclei With Medium-Mass Targets
C. Beck, N. Rowley, P. Papka +14
An experimental overview of reactions induced by the stable, but weakly-bound nuclei 6Li, 7Li and 9Be, and by the exotic, halo nuclei 6He, 8He, 8B, and 11Be on medium-mass targets,…
Gamma-ray emission in proton-induced nuclear reactions on natC and Mylar targets over the incident energy range of Ep = 30-200 MeV. Astrophysical implications
Y. Rahma, S. Ouichaoui, J. Kiener +37
We have measured the gamma-ray line production cross sections in proton-induced nuclear reactions on various target nuclei abundant in astrophysical sites over the incident energy…
Proton decays from -unbound states in Mg and the Ne()Na cross section
J. W. Brümmer, P. Adsley, T. Rauscher +15
This paper examines the Ne()Na cross-section relevant in X-ray bursts. The study was performed with the K600 magnetic spectrometer in coincidence with the…
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…
Deformation dependence of the isovector giant dipole resonance: The neodymium isotopic chain revisited
L. M. Donaldson, C. A. Bertulani, J. Carter +31
Proton inelastic scattering experiments at energy E_p = 200 MeV and a spectrometer scattering angle of 0 degree were performed on 144,146,148,150Nd and 152Sm exciting the IsoVector…
Characterization of the proposed 4-α cluster state candidate in 16O
K. C. W. Li, R. Neveling, P. Adsley +14
The reaction was studied at at an incident energy of = 200 MeV using the K600 magnetic spectrometer at iT…
Re-examining the Mg()Mg reaction - probing astrophysically important states in Mg
P. Adsley, J. W. Brümmer, K. C. W. Li +10
Background: The Ne()Mg reaction is one of the neutron sources for the -process in massive stars. The properties of levels in Mg above the -particl…
Nuclear level densities and gamma-ray strength functions of Ta
C. P. Brits, K. L. Malatji, M. Wiedeking +24
Particle- coincidence experiments were performed at the Oslo Cyclotron Laboratory with the Ta(d,X) and Ta(He,X) reactions, to measure the nuclear level de…
CAKE: The Coincidence Array for K600 Experiments
P. Adsley, R. Neveling, P. Papka +12
The combination of a magnetic spectrometer and ancillary detectors such as silicon detectors is a powerful tool for the study of nuclear reactions and nuclear structure. This paper…
Multi-probe study of excited states in : disentangling the sources of monopole strength between the Hoyle state and MeV
K. C. W. Li, F. D. Smit, P. Adsley +24
Knowledge of the low-lying monopole strength in , the Hoyle state in particular, is crucial for our understanding of both the astrophysically important react…
The Structure of Si and the magicity of the N=20 gap at Z=14
S. Jongile, A. Lemasson, O. Sorlin +20
The structure of Si was studied by a one-neutron knockout reaction from a Si beam at 98.5 MeV/u incident on a Be target. The prompt -rays following the de-e…
Isoscalar giant monopole resonance in Mg and Si: Effect of coupling between the isoscalar monopole and quadrupole strength
A. Bahini, V. O. Nesterenko, I. T. Usman +25
Background: In highly deformed nuclei, there is a noticeable coupling of the Isoscalar Giant Monopole Resonance (ISGMR) and the component of the Isoscalar Giant Quadrupole…
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,…
No evidence of an 11.16 MeV 2+ state in 12C
F. D. Smit, F. Nemulodi, Z. Buthelezi +15
An experiment using the 11B(3He,d)12C reaction was performed at iThemba LABS at an incident energy of 44 MeV and analyzed with a high energy-resolution magnetic spectrometer, to re…
Strong Deformation Effects in Hot Rotating 46Ti
M. Kmiecik, A. Maj, M. Brekiesz +22
Exotic-deformation effects in 46Ti nucleus were investigated by analysing the high-energy gamma-ray and the alpha-particle energy spectra. One of the experiments was performed usin…
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…
Fine structure of the isoscalar giant monopole resonance in Ni, Zr, Sn and Pb
A. Bahini, P. von Neumann-Cosel, J. Carter +26
Over the past two decades high energy-resolution inelastic proton scattering studies were used to gain an understanding of the origin of fine structure observed in the isoscalar gi…
Measurement and analysis of nuclear -ray production cross sections in proton interactions with Mg, Si and Fe nuclei abundant in astrophysical sites over the incident energy range MeV
W. Yahia-Cherif, S. Ouichaoui, J. Kiener +29
Gamma-ray production cross section excitation functions have been measured for , , and MeV proton beams accelerated onto targets of astrophysical interest, $^{nat…
Isoscalar monopole and dipole transitions in Mg, Mg and Si
P. Adsley, V. O. Nesterenko, M. Kimura +16
Nuclei in the -shell demonstrate a remarkable interplay of cluster and mean-field phenomena. The nuclei, such as Mg and Si, have been the focus of the theor…
The first candidate for chiral nuclei in the mass region: Br
S. Y. Wang, B. Qi, L. Liu +23
Excited states of Br have been investigated via the Ge(B, 3n) and Ge(Li, 3n) reactions and a new = 1 band has been identified which resi…
Damping of the isovector giant dipole resonance in Ca
J. Carter, L. M. Donaldson, H. Fujita +21
The fine structure of the IsoVector Giant Dipole Resonance (IVGDR) in the doubly-magic nuclei Ca observed in inelastic proton scattering experiments under is us…
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…
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…
Nature of low-lying electric dipole resonance excitations in 74Ge
D. Negi, M. Wiedeking, E. G. Lanza +32
Isospin properties of dipole excitations in 74 Ge are investigated using the (α,α'γ) reaction and compared to (γ,γ) data. The results indicate that the dipole excitations in t…
Proton-unbound states in relevant for the reaction in novae
E. C. Vyfers, V. Pesudo, S. Triambak +13
Background: The nucleosynthesis of several proton-rich nuclei is determined by radiative proton-capture reactions on unstable nuclei in nova explosions. One such reaction is $^{23}…
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…
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 + $^{…
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…
Isospin Mixing and the Cubic Isobaric Multiplet Mass Equation in the Lowest T = 2, A = 32 Quintet
M. Kamil, S. Triambak, A. Magilligan +24
The isobaric multiplet mass equation (IMME) is known to break down in the first T = 2, A = 32 isospin quintet. In this work we combine high-resolution experimental data with state-…
Wavelet signatures of -splitting of the Isoscalar Giant Quadrupole Resonance in deformed nuclei from high-resolution (p,p) scattering off Nd
C. O. Kureba, Z. Buthelezi, J. Carter +22
The phenomenon of fine structure of the Isoscalar Giant Quadrupole Resonance (ISGQR) has been studied with high energy-resolution proton inelastic scattering at iThemba LABS in the…
Evolution of the isoscalar giant monopole resonance in the Ca isotope chain
S. D. Olorunfunmi, R. Neveling, J. Carter +25
Two recent studies of the evolution of the isoscalar giant monopole resonance (ISGMR) within the calcium isotope chain report conflicting results. One study suggests that the monop…
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…
Investigating the predicted breathing-mode excitation of the Hoyle state
K. C. W. Li, F. D. Smit, P. Adsley +25
Knowledge of the low-lying monopole strength in the Hoyle state in particular is crucial for our understanding of both the astrophysically important …
Alpha clustering in Si probed through the identification of high-lying states
P. Adsley, D. G. Jenkins, J. Cseh +15
Aspects of nuclear structure in alpha-conjugate nuclei have long been associated with alpha clustering, including the existence of superdeformed bands. In this paper, an alpha-part…
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…
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…
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…
Observation of triple-photon decay in positron-electron pair annihilation: a triple coincidence setup for the undergraduate laboratory
M. E. A. Elbasher, W. Erasmus, E. A. M. Khaleel +2
The positron-electron pair annihilation in two photons is known for its numerous applications using PET scanners. The decay of Positronium (Ps) from a standard sealed source in mor…
Studies of the Giant Dipole Resonance in Al, Ca, Fe, Ni and Pb with high energy-resolution inelastic proton scattering under 0
M. Jingo, E. Z. Buthelezi, J. Carter +16
A survey of the fine structure of the Isovector Giant Dipole Resonance (IVGDR) was performed, using the recently commissioned zero-degree facility of the K600 magnetic spectrometer…
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…
Large Deformation Effects in the N = Z 44Ti Compound Nucleus
P. Papka, C. Beck, F. Haas +18
The N = Z 44Ti* nucleus has been populated in Fusion Evaporation process at very high excitation energies and angular momenta using two entrance channels with different mass-asymme…
Statistical properties of Xe and the Xe cross section
H. C. Berg, V. W. Ingeberg, S. Siem +17
Xe is an interesting case for plasma physics to explore nuclear excitation by electron capture, as the process can be studied using statistical properties of Xe. In…
Gamma-ray production cross sections in proton interactions with natMg, natSi and 56Fe targets: measurement over the energy range of -125 MeV, data analysis, results and discussion. Astrophysical implications
M. Debabi, S. Ouichaoui, A. Belhout +34
We have measured nuclear gamma-ray line production cross sections in interactions of highly accelerated proton beams with various target nuclei abundant in astrophysical sites. The…
Isoscalar giant monopole strength in Ni, Zr, Sn and Pb
A. Bahini, R. Neveling, P. von Neumann-Cosel +22
Inelastic -particle scattering at energies of a few hundred MeV and very-forward scattering angles including has been established as a tool for the study of the isosc…
Understanding the total width of the state in
K. C. W. Li, R. Neveling, P. Adsley +12
Recent measurements indicate that the previously established upper limit for the -decay branch of the resonance in at MeV may b…
Nuclear level densities and -ray strength functions of -- First application of the Oslo Method in inverse kinematics
V. W. Ingeberg, S. Siem, M. Wiedeking +26
The -ray strength function (SF) and nuclear level density (NLD) have been extracted for the first time from inverse kinematic reactions with the Oslo Method. This novel tec…
Fine structure of the isoscalar giant monopole resonance in Ca
S. D. Olorunfunmi, I. T. Usman, J. Carter +19
Experiments investigating the fine structure of the IsoScalar Giant Monopole Resonance (ISGMR) of 48Ca were carried out with a 200 MeV alpha inelastic-scattering reaction, using th…
Fine Structure of the Isovector Giant Dipole Resonance in Nd and Sm
L. M. Donaldson, J. Carter, P. von Neumann-Cosel +35
Background: Inelastic proton scattering at energies of a few hundred MeV and very-forward angles including has been established as a tool to study electric-dipole strengt…
Second T = 3/2 state in B and the isobaric multiplet mass equation
N. J. Mukwevho, B. M. Rebeiro, D. J. MarÃn-Lámbarri +17
Recent high-precision mass measurements and shell model calculations~[Phys. Rev. Lett. {\bf 108}, 212501 (2012)] have challenged a longstanding explanation for the requirement of a…
Gamma ray production cross sections in proton induced reactions on natural Mg, Si and Fe targets over the proton energy range 30 up to 66 MeV
W. Yahia-Chérif, S. Ouichaoui, J. Kiener +29
Gamma-ray excitation functions have been measured for 30, 42, 54 and 66 MeV proton beams accelerated onto C + O (Mylar), Mg, Si, and Fe targets of astrophysical interest at the sep…