T. Faestermann
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View article: Spectroscopic investigation of states in 136Ba via the 137Ba(3He, α) reaction
Spectroscopic investigation of states in 136Ba via the 137Ba(3He, α) reaction Open
View article: Half-life determination of heavy ions in a storage ring considering feeding and depleting background processes
Half-life determination of heavy ions in a storage ring considering feeding and depleting background processes Open
Heavy-ion storage rings have relatively large momentum acceptance which allows for multiple ion species to circulate at the same time. This needs to be considered in radioactive decay measurements of highly charged ions, where atomic charg…
View article: Extremely large oblate deformation of the first excited state in $^{12}$C: a new challenge to modern nuclear theory
Extremely large oblate deformation of the first excited state in $^{12}$C: a new challenge to modern nuclear theory Open
A Coulomb-excitation study of the high-lying first excited state at 4.439 MeV in the nucleus $^{12}$C has been carried out using the $^{208}$Pb($^{12}$C,$^{12}$C$^*$)$^{208}$Pb$^*$ reaction at 56 MeV and the {\sc Q3D} magnetic spectrograph…
View article: Bayesian and Monte Carlo approaches to estimating uncertainty for the measurement of the bound-state $β$ decay of $^{205}\mathrm{Tl}^{81+}$
Bayesian and Monte Carlo approaches to estimating uncertainty for the measurement of the bound-state $β$ decay of $^{205}\mathrm{Tl}^{81+}$ Open
The measurement of the bound-state $β$ decay of $^{205}\mathrm{Tl}^{81+}$ at the Experimental Storage Ring at GSI, Darmstadt, has recently been reported with substantial impact on the use of $^{205}\mathrm{Pb}$ as an early Solar System chr…
View article: Bayesian and Monte Carlo approaches to estimating uncertainty for the measurement of the bound-state $β$ decay of $^{205}\mathrm{Tl}^{81+}$
Bayesian and Monte Carlo approaches to estimating uncertainty for the measurement of the bound-state $β$ decay of $^{205}\mathrm{Tl}^{81+}$ Open
The measurement of the bound-state $β$ decay of $^{205}\mathrm{Tl}^{81+}$ at the Experimental Storage Ring at GSI, Darmstadt, has recently been reported with substantial impact on the use of $^{205}\mathrm{Pb}$ as an early Solar System chr…
View article: Bound-State Beta Decay of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Tl</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>205</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow><mml:mrow><mml:mn>81</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math> Ions and the LOREX Project
Bound-State Beta Decay of Ions and the LOREX Project Open
Stable Tl
View article: High-temperature 205Tl decay clarifies 205Pb dating in early Solar System
High-temperature 205Tl decay clarifies 205Pb dating in early Solar System Open
View article: Experimental Determination of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>α</mml:mi></mml:mrow></mml:math> Widths of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Ne</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>21</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> Levels in the Region of Astrophysical Interest: New <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>17</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow><mml:mo>+</mml:mo><mml:mi>α</mml:mi></mml:mrow></mml:math> Reaction Rates and Impact on the Weak <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>s</mml:mi></mml:math> Process
Experimental Determination of Widths of Levels in the Region of Astrophysical Interest: New Reaction Rates and Impact on the Weak Process Open
The efficiency of the weak s process in low-metallicity rotating massive stars depends strongly on the rates of the competing ^{17}O(α,n)^{20}Ne and ^{17}O(α,γ)^{21}Ne reactions that determine the potency of the ^{16}O neutron poison. Thei…
View article: Superallowed beta-decay between isobaric analog states up to $${{\textbf {A}}}=\textbf{99}$$
Superallowed beta-decay between isobaric analog states up to $${{\textbf {A}}}=\textbf{99}$$ Open
Isospin symmetry is used to fit the precisely known $$Q_{EC}$$ -values of lighter $$T_Z=0,-1$$ and $$T_Z=-1/2$$ $$\beta $$ -emitters and to extrapolate them up to $$Z=50$$ . For the $$\hbox {T}=1$$ emit…
View article: Searching for resonance states in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mmultiscripts><mml:mi>Ne</mml:mi><mml:mprescripts/><mml:none/><mml:mn>22</mml:mn></mml:mmultiscripts><mml:mo>(</mml:mo><mml:mi>p</mml:mi><mml:mo>,</mml:mo><mml:mi>γ</mml:mi><mml:mo>)</mml:mo><mml:mmultiscripts><mml:mi>Na</mml:mi><mml:mprescripts/><mml:none/><mml:mn>23</mml:mn></mml:mmultiscripts></mml:mrow></mml:math>
Searching for resonance states in Open
Globular clusters show strong correlations between different elements, such as the well-known sodium-oxygen anticorrelation. One of the main sources of uncertainty in this anticorrelation is the 22Ne(p,γ)23Na reaction…
View article: Spectroscopic Analysis of the Energy-Level Structure in Rhenium-190
Spectroscopic Analysis of the Energy-Level Structure in Rhenium-190 Open
Investigations of neutron-rich nuclei, particularly those that lie in regions of the nuclear chart known for a high probability of isomeric states forming, are of vital importance to the understanding of nuclear astrophysical processes. St…
View article: Investigations of the structures of the Ru isotopes: <sup>98</sup>Ru
Investigations of the structures of the Ru isotopes: <sup>98</sup>Ru Open
As part of a systematic study of the nuclear structure of the Ru isotopes, 98 Ru was investigated via the β-decay of 98 Rh at iThemba LABS, and the 100 Ru( p, t ) reaction at the Maier-Leibnitz Laboratory. The combined data results in sign…
View article: Understanding globular cluster abundances through nuclear reactions
Understanding globular cluster abundances through nuclear reactions Open
Globular clusters contain multiple stellar populations, with some previous generation of stars polluting the current stars with heavier elements. Understanding the history of globular clusters is helpful in understanding how galaxies merge…
View article: Updated analysis of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mmultiscripts><mml:mi>Er</mml:mi><mml:mprescripts/><mml:none/><mml:mn>170</mml:mn></mml:mmultiscripts><mml:mo>(</mml:mo><mml:mi>p</mml:mi><mml:mo>,</mml:mo><mml:mi>t</mml:mi><mml:mo>)</mml:mo><mml:mmultiscripts><mml:mi>Er</mml:mi><mml:mprescripts/><mml:none/><mml:mn>168</mml:mn></mml:mmultiscripts></mml:mrow></mml:math> reaction data
Updated analysis of the reaction data Open
More than 200 states up to 4.1 MeV excitation have been populated in 168Er with the 170Er (p, t) reaction at 25 MeV incident energy. About 80 of these states, with 0+ and 2+ ass…
View article: Recent nucleosynthesis in the solar neighbourhood, detected with live radionuclides
Recent nucleosynthesis in the solar neighbourhood, detected with live radionuclides Open
View article: Coulomb excitation of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Ru</mml:mi><mml:mprescripts/><mml:none/><mml:mn>102</mml:mn></mml:mmultiscripts></mml:math> with <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">C</mml:mi><mml:mprescripts/><mml:none/><mml:mn>12</mml:mn></mml:mmultiscripts></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">O</mml:mi><mml:mprescripts/><mml:none/><mml:mn>16</mml:mn></mml:mmultiscripts></mml:math>
Coulomb excitation of with and Open
The Coulomb excitation of 102Ru was performed with beams of 12C and 16O ions. The beam particles
\nscattered at forward angles were momentum analyzed with a magnetic spectrograph. The resolution achieved
\nenabled the populations of the 2+…
View article: New results on the tetraneutron, seen in context
New results on the tetraneutron, seen in context Open
In a recent publication an experiment is described which searched for a resonance in the four-neutron system. In a convincing way the knockout of an $α$-particle off $^8$He nuclei by protons has been measured and the missing mass of the re…
View article: Proton capture on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">P</mml:mi><mml:mprescripts/><mml:none/><mml:mn>30</mml:mn></mml:mmultiscripts></mml:math>in novae: On the existence of states at 6.40 MeV and 6.65 MeV in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">S</mml:mi><mml:mprescripts/><mml:none/><mml:mn>31</mml:mn></mml:mmultiscripts></mml:math>
Proton capture onin novae: On the existence of states at 6.40 MeV and 6.65 MeV in Open
We use a high resolution $^{32}{\rm S}(d,t)$ measurement to investigate the claimed existence of a 6401(3) keV state in $^{31}$S that may affect the $^{30}{\rm P}(p,\gamma)$ nuclear reaction rate in oxygen-neon (ONe) novae. Our data are sh…
View article: Fission resonances observed in the $$^{237}$$Np(d,pf) reaction and the fission barrier topology of $$^{238}$$Np
Fission resonances observed in the $$^{237}$$Np(d,pf) reaction and the fission barrier topology of $$^{238}$$Np Open
The fission probability of $$^{238}$$ Np was measured as a function of the excitation energy in the energy range of E $$^* = 5.4 - 6.2$$ MeV in order to search for transmission fission resonances. A radioactive $$^{237}$$ Np …
View article: Experimental study of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mmultiscripts><mml:mi>Si</mml:mi><mml:mprescripts/><mml:none/><mml:mn>30</mml:mn></mml:mmultiscripts><mml:mo>(</mml:mo><mml:mmultiscripts><mml:mi mathvariant="normal">He</mml:mi><mml:mprescripts/><mml:none/><mml:mn>3</mml:mn></mml:mmultiscripts><mml:mo>,</mml:mo><mml:mi>d</mml:mi><mml:mo>)</mml:mo><mml:mmultiscripts><mml:mi mathvariant="normal">P</mml:mi><mml:mprescripts/><mml:none/><mml:mn>31</mml:mn></mml:mmultiscripts></mml:mrow></mml:math> reaction and thermonuclear reaction rate of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mmultiscripts><mml:mi mathvariant="normal">Si</mml:mi><mml:mprescripts/><mml:none/><mml:mn>30</mml:mn></mml:mmultiscripts><mml:mo>(</mml:mo><mml:mi>p</mml:mi><mml:mo>,</mml:mo><mml:mi>γ</mml:mi><mml:mo>)</mml:mo><mml:mmultiscripts><mml:mi mathvariant="normal">P</mml:mi><mml:mprescripts/><mml:none/><mml:mn>31</mml:mn></mml:mmultiscripts></mml:mrow></mml:math>
Experimental study of the reaction and thermonuclear reaction rate of Open
Background: Abundance anomalies in some globular clusters, such as the enhancement of potassium and the depletion of magnesium, can be explained in terms of an earlier generation of stars polluting the presently observed ones. It was shown…
View article: Proton partial widths evaluation through the <sup>30</sup>Si(<sup>3</sup>He,<i>d</i>)<sup>31</sup>P transfer reaction for understanding abundance anomalies in Globular Clusters
Proton partial widths evaluation through the <sup>30</sup>Si(<sup>3</sup>He,<i>d</i>)<sup>31</sup>P transfer reaction for understanding abundance anomalies in Globular Clusters Open
Some observed abundances in globular clusters have suggested the existence of multiple generations of stars within the clusters as the observations require temperature ranges higher than current stars. The 30 Si( p ,γ) 31 P reaction plays …
View article: The Dyadic Radionuclide System <sup>60</sup>Fe / <sup>53</sup>Mn to Distinguish Interstellar from Interplanetary <sup>60</sup>Fe
The Dyadic Radionuclide System <sup>60</sup>Fe / <sup>53</sup>Mn to Distinguish Interstellar from Interplanetary <sup>60</sup>Fe Open
The discovery of live 60 Fe in a deep-sea crust with proposed interstellar origin followed by evidence for elevated interplanetary 3 He in the same crust raised the question on how to unambiguously identify the true production site of the …
View article: Isospin mixing and the cubic isobaric multiplet mass equation in the lowest <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>T</mml:mi><mml:mo>=</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:math>, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>A</mml:mi><mml:mo>=</mml:mo><mml:mn>32</mml:mn></mml:mrow></mml:math> quintet
Isospin mixing and the cubic isobaric multiplet mass equation in the lowest , quintet Open
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-of-the-art shell-model calculations to investigate isospin mixin…
View article: Indications for a bound tetraneutron
Indications for a bound tetraneutron Open
View article: Neutron occupancies and single-particle energies across the stable tin isotopes
Neutron occupancies and single-particle energies across the stable tin isotopes Open
The occupancies and vacancies of the valence neutron orbitals across the stable tin isotopic chain from $112\leq A\leq 124$ have been determined. These were inferred from the cross sections of neutron-adding and -removing reactions. In eac…
View article: The (6+) isomer in 102Sn revisited: Neutron and proton effective charges close to the double shell closure
The (6+) isomer in 102Sn revisited: Neutron and proton effective charges close to the double shell closure Open
View article: Corrigendum to “Benchmarking 136Xe neutrinoless ββ decay matrix element calculations with the 138Ba(p,t) reaction” [Phys. Lett. B 809 (2020) 135702]
Corrigendum to “Benchmarking 136Xe neutrinoless ββ decay matrix element calculations with the 138Ba(p,t) reaction” [Phys. Lett. B 809 (2020) 135702] Open
View article: Erratum: Properties of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>γ</mml:mi></mml:math>-decaying isomers and isomeric ratios in the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi mathvariant="normal">Sn</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>100</mml:mn></mml:mrow></mml:mmultiscripts></mml:math> region [Phys. Rev. C <b>96</b>, 044311 (2017)]
Erratum: Properties of -decaying isomers and isomeric ratios in the region [Phys. Rev. C <b>96</b>, 044311 (2017)] Open
International audience
View article: Precision branching-ratio measurements in $$^{18}$$O
Precision branching-ratio measurements in $$^{18}$$O Open
View article: Investigation of pair-correlated <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mn>0</mml:mn><mml:mo>+</mml:mo></mml:msup></mml:math> states in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Ba</mml:mi><mml:mprescripts/><mml:none/><mml:mn>134</mml:mn></mml:mmultiscripts></mml:math> via the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mmultiscripts><mml:mi>Ba</mml:mi><mml:mprescripts/><mml:none/><mml:mn>136</mml:mn></mml:mmultiscripts><mml:mo>(</mml:mo><mml:mi>p</mml:mi><mml:mo>,</mml:mo><mml:mi>t</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:math> reaction
Investigation of pair-correlated states in via the reaction Open
We performed a high resolution study of $0^{+}$ states in $^{134}$Ba using\nthe $^{136}$Ba($p,t$) two-neutron transfer reaction. Our experiment shows a\nsignificant portion of the $L = 0$ pair-transfer strength concentrated at\nexcited $0^…