Future experiments using forward electron spectroscopy to study the quantum dynamics of high-<i>Z</i>ions at the ESR/CRYRING storage rings

Hillenbrand, P.‐M.; Hagmann, S.; Stöhlker, Th.; Litvinov, Yu. A.; Kozhuharov, C.; Spillmann, U.; Shabaev, V. M.; Stiebing, K. E.; Lestinsky, M.; Surzhykov, A.; Voitkiv, A. B.; Franzke, B.; Fischer, Daniel; Brandau, C.; Schippers, S.; Mueller, A.; Schneider, Dieter; Jakubassa, D.H.; Artiomov, A.S.; DeFilippo, E.; Ma, Xinwen; Dørner, R.; Rothard, H.

doi:10.1088/0031-8949/2013/t156/014087

Cited by 13 publications

(10 citation statements)

References 21 publications

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“…Compared to the projectile energies available at the ESR, the energy range of highly charged ions available will be extended towards lower energies at CRYRING@ESR [58] and towards higher energies at HESR [59]. For the investigation of RECC highly charged heavy ions at low energies are advantageous since both the cross section and the asymmetry of the RECC cusp increase with decreasing projectile energy [26,31].…”

Section: Discussionmentioning

confidence: 99%

Radiative-electron-capture-to-continuum cusp inU88++N2collisions and the high-energy endpoint of electron-nucleus bremsstrahlung

Hillenbrand¹,

Hagmann²,

Atanasov³

et al. 2014

Phys. Rev. A

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The radiative electron capture of a target electron into the projectile continuum has been studied for the collision system U 88+ + N 2 → U 88+ + [N + 2 ] * + e − + γ at 90 MeV/u. Using a magnetic electron spectrometer, the energy distribution of cusp electrons emitted under an angle of 0 • with respect to the projectile beam and with a velocity close to the projectile velocity has been measured in coincidence with the emitted photons under various observation angles. The experimental results provide a stringent test for the corresponding process in inverse kinematics, namely, the theory of electron-nucleus bremsstrahlung at the high-energy endpoint. For comparison this process is calculated using fully relativistic Dirac wave functions and using semirelativistic Sommerfeld-Maue wave functions.

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Section: Discussionmentioning

confidence: 99%

Radiative-electron-capture-to-continuum cusp inU88++N2collisions and the high-energy endpoint of electron-nucleus bremsstrahlung

Hillenbrand¹,

Hagmann²,

Atanasov³

et al. 2014

Phys. Rev. A

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“…Once FRANZ starts operation, it might be possible to reduce the flight path to about 10 cm, thus extending the possibilities for measure-ments on unstable samples significantly. Recently, neutron-induced reactions in inverse kinematics have been proposed [23] by combining a beam of radioactive ions cycling in a storage ring similar to the CRYRING at GSI/FAIR [24] with a reactor core or a cold neutron beam as the neutron target. This method would also provide an option for unstable isotopes with half-lives below about a week, too short for measurements with stationary samples.…”

Section: Discussionmentioning

confidence: 99%

Neutron capture data for unstable nuclei – Astrophysical quests and experimental challenges

Käppeler

2019

hnps

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The abundances of the chemical elements heavier than iron can be attributed in about equal parts to the r and s processes, which are taking place in supernova explosions and during the He and C burning phases of stellar evolution, respectively. So far, quantitative studies of the r-process are out of reach, because it involves reactions on extremely short-lived neutron-rich nuclei. On the contrary, the situation for the s-process is far advanced, thanks to a comprehensive database of experimental (n,γ) cross sections for most isotopes along the reaction path from 12C to the Pb/Bi region. For the stable isotopes last gaps in the data are presently closed, but further studies are clearly needed to reach the required accuracy and to resolve remaining discrepancies. The quest for cross sections of unstable isotopes remains a persisting challenge though. In particular, nuclei which act as branching points are of prime interest, because they provide key information on the deep stellar interior. While the activation method is limited to a few exceptional branch-point nuclei, successful measurements via the time-of- flight technique are depending on intense pulsed neutron sources and elaborate methods for sample production. Current developments in Europe are providing promising perspectives in both areas.

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“…Furthermore, since a low energy storage ring CRYRING is being constructed downstream the ESR [170] a backwards connection of the FAIR facilities with the ESR-CRYRING would offer a great potential for physics with slow cold ion or antiproton beams. With CRYRING, ESR, CR, and HESR, FAIR will offer stable and radioactive HCIs in a broad and continuous range of energies from a few hundreds keV/u (CRYRING) until 5-6 GeV/u (HESR) thus allowing for unique atomic and nuclear physics experiments (see, e.g., [172,173,174,175,176,177,178,179,180,181,182,183]). …”

Section: Discussionmentioning

confidence: 99%

Radioactive decays of highly-charged ions

Gao

Najafi

Atanasov

et al. 2015

EPJ Web of Conferences

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Abstract. Access to stored and cooled highly-charged radionuclides offers unprecedented opportunities to perform high-precision investigations of their decays. Since the few-electron ions, e.g. hydrogen-or helium-like ions, are quantum mechanical systems with clear electronic ground state configurations, the decay studies of such ions are performed under well-defined conditions and allow for addressing fundamental aspects of the decay process. Presented here is a compact review of the relevant experiments conducted at the Experimental Storage Ring ESR of GSI. A particular emphasis is given to the investigations of the two-body beta decay, namely the bound-state β-decay and its time-mirrored counterpart, orbital electron-capture.

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Future experiments using forward electron spectroscopy to study the quantum dynamics of high-Zions at the ESR/CRYRING storage rings

Cited by 13 publications

References 21 publications

Radiative-electron-capture-to-continuum cusp inU88++N2collisions and the high-energy endpoint of electron-nucleus bremsstrahlung

Radiative-electron-capture-to-continuum cusp inU88++N2collisions and the high-energy endpoint of electron-nucleus bremsstrahlung

Neutron capture data for unstable nuclei – Astrophysical quests and experimental challenges

Radioactive decays of highly-charged ions

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