Α. Dewald
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View article: FIRST δ<sup>13</sup>C RESULTS WITH A NEW CONNECTION BETWEEN THE EA-IRMS SYSTEM AND THE GAS INJECTION SYSTEM AT COLOGNEAMS
FIRST δ<sup>13</sup>C RESULTS WITH A NEW CONNECTION BETWEEN THE EA-IRMS SYSTEM AND THE GAS INJECTION SYSTEM AT COLOGNEAMS Open
This work presents the integration of an elemental analyzer (EA) and an isotope ratio mass spectrometer (IRMS) into the 6 MV AMS system at the Institute for Nuclear Physics, University of Cologne. The AMS measurement of δ 13 C values for I…
View article: Evolution of the structure of the ${4}_{1}^{+}$ states in Po isotopes
Evolution of the structure of the ${4}_{1}^{+}$ states in Po isotopes Open
The lifetime of the 4₁⁺ state in ²⁰⁸Po has been measured using γ − γ fast-timing technique with LaBr₃(Ce) Detectors. The experiment was performed at the FN Tandem facility at the University of Cologne. The preliminary results are discussed…
View article: Lifetime measurements of the low-lying excited states of <sup>208</sup>Po
Lifetime measurements of the low-lying excited states of <sup>208</sup>Po Open
In this study we present the preliminary results about the lifetimes of the , states of 208 Po and the upper limit of the lifetime of the state. For measuring the lifetimes of the and states the Recoil Distanc…
View article: LIFETIMES OF TRANSISTIONAL NUCLEI IN THE A~130 REGION
LIFETIMES OF TRANSISTIONAL NUCLEI IN THE A~130 REGION Open
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View article: Lifetime Measurements of Low-lying States in \(^{73}\)Ga and \(^{70,72,74}\)Zn Isotopes
Lifetime Measurements of Low-lying States in \(^{73}\)Ga and \(^{70,72,74}\)Zn Isotopes Open
Lifetimes of low-lying states in 73Ga and 70,72,74Zn were measured using the Recoil Distance Doppler Shift (RDDS) method. These nuclei were produced in deep-inelastic reactions in inverse kinematics with a 208Pb beam impinging on a 76Ge ta…
View article: Ion beam techniques for nuclear waste management
Ion beam techniques for nuclear waste management Open
An automated CO 2 gas handling and injection system was developed. It is designed to dilute CO 2 samples with blank gas in a mixing volume. The system is intended to be used for the characterization and quantification of 14 C content in re…
View article: A systematic study of proton capture reactions in the Se-Sn region relevant to p-process nucleosynthesis
A systematic study of proton capture reactions in the Se-Sn region relevant to p-process nucleosynthesis Open
The synthesis of the so-called ρ nuclei, i.e. a certain class of proton rich nuclei that are heavier than iron, requires a special mechanism known as ρ process. This process consists of various nucleosynthetic scenaria. In some of them pro…
View article: Preliminary results of lifetime measurements in neutron-rich <sup>53</sup>Ti
Preliminary results of lifetime measurements in neutron-rich <sup>53</sup>Ti Open
To study the nuclear structure of neutron-rich titanium isotopes, a lifetime measurement was performed at the Grand Accélérateur National d'Ions Lourds (GANIL) facility in Caen, France. The nucleiwere produced in a multinucleon-transfer re…
View article: Structural investigation of neutron-deficient Pt isotopes: the case of <sup>178</sup>Pt
Structural investigation of neutron-deficient Pt isotopes: the case of <sup>178</sup>Pt Open
Lifetime measurements with the recoil distance Doppler-shift technique have been performed to determine yrast E 2 transition strengths in 178 Pt. The experimental data are related to those on neighboring Pt isotopes, especially recent data…
View article: Low collectivity of the first 2<sup>+</sup> states of <sup>212,210</sup>Po
Low collectivity of the first 2<sup>+</sup> states of <sup>212,210</sup>Po Open
The lifetimes of the first 2⁺ excited states of ²¹²Po,²¹⁰Po were measured in two transfer reactions ²⁰⁸Pb(¹²C,⁸Be)²¹²Po and ²⁰⁸Pb(¹²C,¹⁰Be)²¹⁰Po by the Recoil Distance Doppler Shift (RDDS) method and by the Doppler Shift Attenuation method…
View article: Enhanced collectivity along the <i>N = Z</i> line: lifetime measurements in <sup>44</sup>Ti, <sup>48</sup>Cr, and <sup>52</sup>Fe
Enhanced collectivity along the <i>N = Z</i> line: lifetime measurements in <sup>44</sup>Ti, <sup>48</sup>Cr, and <sup>52</sup>Fe Open
Lifetimes of the states in 44Ti, 48,50Cr, and 52Fe were determined with high accuracy exploiting the recoil distance Doppler-shift method. The reduced E2 transition strengths of 44Ti and 52 Fe differ considerably from previously known valu…
View article: Lifetimes and electromagnetic transition strength in <sup>124</sup>Ba
Lifetimes and electromagnetic transition strength in <sup>124</sup>Ba Open
Lifetimes of excited states of 124 Ba were measured by the Recoil Distance Doppler Shift (RDDS) technique. The γ-ray coincidence data were analysed by the Differential Decay Curve method (DDCM). The trend of the experimentally deduced norm…
View article: Determination of lifetimes of nuclear excited states using the Recoil Distance Doppler Shift Method in combination with magnetic spectrometers
Determination of lifetimes of nuclear excited states using the Recoil Distance Doppler Shift Method in combination with magnetic spectrometers Open
\n The current work presents the determination of lifetimes of nuclear excited states using the Recoil Distance Doppler Shift Method, in combination with spectrometers for ion identification, normalizing the intensity of the peaks by the i…
View article: Enhanced collectivity along the N = Z line: Lifetime measurements in 44 Ti, 48 Cr, and 52 Fe
Enhanced collectivity along the N = Z line: Lifetime measurements in 44 Ti, 48 Cr, and 52 Fe Open
Lifetimes of the 21+ states in 44Ti, 48,50Cr, and 52Fe were determined with high accuracy exploiting the recoil distance Doppler-shift method. The reduced E2 transition strengths of 44Ti and 52Fe differ considerably from previously known v…
View article: Evolution of nuclear shapes in odd-mass yttrium and niobium isotopes from lifetime measurements following fission reactions
Evolution of nuclear shapes in odd-mass yttrium and niobium isotopes from lifetime measurements following fission reactions Open
Lifetimes of excited states in Y-99, Y-101, Nb-101, Nb-103, and Nb-105 were measured in an experiment using the recoil distance Doppler shift method at GANIL (Grand Accelerateur National dIons Lourds). The neutron-rich nuclei were produced…
View article: Lifetimes and electromagnetic transition strength in<sup>157</sup>Dy
Lifetimes and electromagnetic transition strength in<sup>157</sup>Dy Open
Excited states in 157Dy have been studied by γ-γ coincidence measurements via the reaction 124Sn(36S,3n) at a beam energy of 155MeV. Lifetimes of the relatively lower-spin states in 157Dy were measured by means of the Recoil Distance Doppl…
View article: Search for mixed-symmetry states in<sup>212</sup>Po
Search for mixed-symmetry states in<sup>212</sup>Po Open
In this work we present an experiment dedicated to searching for quarupole- collective isovector valence-shell excitation — the states with so-called mixed proton-neutron symmetry (MSSs), in the nucleus ²¹²Po. The states of interest were p…
View article: Lifetime measurements in mass regions A=100 and A=130 as a test for chirality in nuclear systems
Lifetime measurements in mass regions A=100 and A=130 as a test for chirality in nuclear systems Open
\nTwo odd-odd nuclei from the A ~ 100 and A ~ 130 regions, namely 102Rh and 134Pr have been studied in search for chiral doublet bands via 94Zr(11B,3n)102Rh and 119Sn(19F,4n)134Pr reactions, respectively. Two nearly degenerate bands built …
View article: Lifetime Measurments of Excited States in Neutron-rich Fission Fragments
Lifetime Measurments of Excited States in Neutron-rich Fission Fragments Open
Lifetimes of short-lived excited states in a wide range of neutron-rich fission fragments were measured using the recoil distance Doppler shift (RDDS) technique, which was applied to fusion-fission reactions in inverse kinematics for the f…
View article: Search for mixed-symmetry states of nuclei in the vicinity of the double-magic nucleus<sup>208</sup>Pb
Search for mixed-symmetry states of nuclei in the vicinity of the double-magic nucleus<sup>208</sup>Pb Open
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