Cooling of radioactive ions with the Penning trap REXTRAP

Ames, F.; Bollen, G.; Delahaye, P.; Forstner, O.; Huber, G.; Kester, O.; Reisinger, K.; Schmidt, P. C.

doi:10.1016/j.nima.2004.08.119

Cited by 64 publications

(35 citation statements)

References 24 publications

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“…With a cold transfer line elements other than noble gases were suppressed. Following magnetic separation the A = 35 beam was delivered to the REXTRAP [34] Penning trap, where the ions were cooled via collisions with neon buffer gas before being extracted as a bunched ion beam at 30 kV. Starting with the ejection of the ion bunch from REXTRAP, the WITCH experimental cycle can be subdivided into three distinct phases: accumulation, preparation, and recoil-ion measurement.…”

Section: Methodsmentioning

confidence: 99%

“…After the acceptance of the paper the authors became aware of the publication of new results regarding the effects of scattering limiting the attainable precision in nuclear beta decay measurements with implanted sources [57][58][59], and of the production of intense [31][32][33][34][35] Ar beams with a nanostructured CaO target [60].…”

Section: Note Added In Proofsmentioning

confidence: 99%

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First high-statistics and high-resolution recoil-ion data from the WITCH retardation spectrometer

et al. 2016

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Abstract. The first high-statistics and high-resolution data set for the integrated recoil-ion energy spectrum following the β + decay of 35 Ar has been collected with the WITCH retardation spectrometer located at CERN-ISOLDE. Over 25 million recoil-ion events were recorded on a large-area multichannel plate (MCP) detector with a time-stamp precision of 2 ns and position resolution of 0.1 mm due to the newly upgraded data acquisition based on the LPC Caen FASTER protocol. The number of recoil ions was measured for more than 15 different settings of the retardation potential, complemented by dedicated background and half-life measurements. Previously unidentified systematic effects, including an energy-dependent efficiency of the main MCP and a radiation-induced time-dependent background, have been identified and incorporated into the analysis. However, further understanding and treatment of the radiation-induced background requires additional dedicated measurements and remains the current limiting factor in extracting a betaneutrino angular correlation coefficient for 35 Ar decay using the WITCH spectrometer.

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Section: Methodsmentioning

confidence: 99%

Section: Note Added In Proofsmentioning

confidence: 99%

First high-statistics and high-resolution recoil-ion data from the WITCH retardation spectrometer

et al. 2016

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“…The positively charged nickel beam was extracted from the ion source by applying a 30-kV electrostatic potential and was subsequently sent through the general purpose separator, resulting in a 66 Ni beam which was injected in REX-TRAP [42]. In this Penning trap the beam was accumulated during 30 ms 054321-2 and cooled by interactions with the buffer gas present (usually Ne or Ar).…”

Section: A Beam Production and Manipulationmentioning

confidence: 99%

Experimental study of theNi66(d,p) Ni67
Diriken¹,
Raabe²,
Eberth³
et al. 2015
Phys. Rev. C
9
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5
0
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The quasi-SU(3) sequence of the positive parity νg 9/2 ,d 5/2 ,s 1/2 orbitals above the N = 40 shell gap are assumed to induce strong quadrupole collectivity in the neutron-rich Fe (Z = 26) and Cr (Z = 24) isotopes below the nickel region. In this paper the position and strength of these single-particle orbitals are characterized in the neighborhood of 68 Ni (Z = 28, N = 40) through the 66 Ni(d,p) 67 Ni one-neutron transfer reaction at 2.95 MeV/nucleon in inverse kinematics, performed at the REX-ISOLDE facility in CERN. A combination of the Miniball γ -array and T-REX particle-detection setup was used and a delayed coincidence technique was employed to investigate the 13.3-μs isomer at 1007 keV in 67 Ni. Excited states up to an excitation energy of 5.8 MeV have been populated. Feeding of the νg 9/2 (1007 keV) and νd 5/2 (2207 keV and 3277 keV) positive-parity neutron states and negative parity (νpf ) states have been observed at low excitation energy. The extracted relative spectroscopic factors, based on a distorted-wave Born approximation analysis, show that the νd 5/2 single-particle strength is mostly split over these two excited states. The results are also compared to the distribution of the proton single-particle strength in the 90 Zr region (Z = 40,N = 50).

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“…This is done in two stages: firstly, the released isotopes are accumulated in a Penning trap (REX-TRAP) [51], where they are cooled and stored for a period ranging from 10 ms up to some hundreds of ms. This period depends on the desired charge state, and thus for a given mass, the A/Q ratio.…”

Section: Specific Timing At Isoldementioning

confidence: 99%

The Miniball spectrometer

et al. 2013

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Abstract. The Miniball germanium detector array has been operational at the REX (Radioactive ion beam EXperiment) post accelerator at the Isotope Separator On-Line facility ISOLDE at CERN since 2001. During the last decade, a series of successful Coulomb excitation and transfer reaction studies have been performed with this array, utilizing the unique and high-quality radioactive ion beams which are available at ISOLDE. In this article, an overview is given of the technical details of the full Miniball setup, including a description of the γ-ray and particle detectors, beam monitoring devices and methods to deal with beam contamination. The specific timing properties of the REX-ISOLDE facility are highlighted to indicate the sensitivity that can be achieved with the full Miniball setup. The article is finalized with a summary of some physics highlights at REX-ISOLDE and the utilization of the Miniball germanium detectors at other facilities.

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Cooling of radioactive ions with the Penning trap REXTRAP

Cited by 64 publications

References 24 publications

First high-statistics and high-resolution recoil-ion data from the WITCH retardation spectrometer

First high-statistics and high-resolution recoil-ion data from the WITCH retardation spectrometer

Experimental study of theNi66(d,p) Ni67
Diriken¹,
Raabe²,
Eberth³
et al. 2015
Phys. Rev. C
9
1
5
0
View full text Add to dashboard Cite

The Miniball spectrometer

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Cooling of radioactive ions with the Penning trap REXTRAP

Cited by 64 publications

References 24 publications

First high-statistics and high-resolution recoil-ion data from the WITCH retardation spectrometer

First high-statistics and high-resolution recoil-ion data from the WITCH retardation spectrometer

Experimental study of theNi66(d,p) Ni67Diriken1, Raabe2, Eberth3 et al. 2015Phys. Rev. C9150View full textAdd to dashboardCite

The Miniball spectrometer

Contact Info

Product

Resources

About

Experimental study of theNi66(d,p) Ni67
Diriken¹,
Raabe²,
Eberth³
et al. 2015
Phys. Rev. C
9
1
5
0
View full text Add to dashboard Cite