Experience and prospects of stochastic cooling of radioactive beams at GSI

Nolden, F.; Beckert, K.; Béller, P.; Franzke, B.; Peschke, C.; Steck, M.

doi:10.1016/j.nima.2004.06.062

Cited by 50 publications

(22 citation statements)

References 4 publications

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“…The rest gas pressure in the ESR is about 10 −11 mbar which is an indispensable condition for the present measurements. The inevitable -due to the nuclear reaction process-velocity spread of stored ions has been reduced by stochastic [24] and electron [25] cooling, which allowed achieving a velocity spread as low as δv/v ≈ 5 · 10 −7 in about 6 s. The former cooling method is switched on for about 4 s for fast pre-cooling of the ions. It is designed to operate at the fixed energy of the stored beam of 400 MeV/u, the energy of 122 I ions after the energy degrader.…”

Section: Methodsmentioning

confidence: 99%

Half-life measurements of stored fully ionized and hydrogen-like 122 I ions

et al. 2012

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Abstract. The half-lives of fully ionized and hydrogen-like (H-like)122 I ions have been measured in a heavy-ion storage ring. The β + -decay constants for both charge states and the electron capture (EC) decay constant of H-like ions have been determined. The EC-decay constant in H-like 122 I ions λ H-like EC = 7.35(33) · 10 −4 s −1 is, within the uncertainty, the same as the one in neutral atoms. This result is in agreement with the estimates of recent theoretical considerations on the EC-decay of few-electron ions that explicitly take into account the conservation of the total angular momentum of the nucleus plus lepton(s) system and its projections. No firm confirmation could be concluded from our results on the predicted effect that allowed Gamow-Teller transitions become forbidden if the initial and final total angular momenta are not equal.

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Section: Methodsmentioning

confidence: 99%

Half-life measurements of stored fully ionized and hydrogen-like 122 I ions

et al. 2012

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“…In the SMS, the velocity spread can be reduced by stochastic [91] and electron [92] cooling, which force all stored ions towards the same mean velocity. Intra-beam scattering acts against the cooling process and the velocity spread of the stored ions is proportional to their number.…”

Section: Schottky Mass Spectrometrymentioning

confidence: 99%

Storage ring mass spectrometry for nuclear structure and astrophysics research

et al. 2016

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In the last two and a half decades ion storage rings have proven to be powerful tools for precision experiments with unstable nuclides in realm of nuclear structure and astrophysics. There are presently three storage ring facilities in the world at which experiments with stored radioactive ions are possible. These are the ESR in GSI, Darmstadt/Germany, the CSRe in IMP, Lanzhou/China, and the R3 storage ring in RIKEN, Saitama/Japan. In this work, an introduction to the facilities is given. Selected characteristic experimental results and their impact in nuclear physics and astrophysics are presented. Planned technical developments and the envisioned future experiments are outlined.

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“…This is achieved by beam cooling. Stochastic [51] and electron [52] cooling methods allow for reducing the initial relative momentum spread of about 10 −2 to 10 −5 − 10 −7 within a few seconds. The latter number depends critically on the number of stored ions [53].…”

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confidence: 99%