Intense beams of mass-separated, neutron-deficient indium, tin, thallium and lead isotopes

Kirchner, R.; Marx, D.; Klepper, O.; Koslowsky, V.T.; Kühl, T.; Larsson, Pontus; Roeckl, E.; Rykaczewski, K. P.; Schardt, D.; Eberz, J.; Huber, G.; Lochmann, H.; Menges, R.; Ulm, G.

doi:10.1016/0168-9002(85)90909-x

Cited by 44 publications

(12 citation statements)

References 15 publications

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“…However, an important modification of this method implies bunchedrelease operation of the ion source, which was used in the present experiment for the first time. For this purpose the target-catcher array of 6 foils of enriched molybdenum (total thickness -~ 35 mg/cm 2) is placed in a pocket, attached radially to a FEBIAD-B2-A 3o0 ion source [11], opposite to the heavy-ion beam entry. The pocket, which is normally heated by thermal contact with the ion source to about 1,100 ~ can be 25o cooled by coupling with a water-cooled, compressedair driven cone.…”

Section: Methodsmentioning

confidence: 99%

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Collinear laser spectroscopy on108g, 108m In using an ion source with bunched beam release

Eberz

Dinger

Horiguchi

et al. 1986

Z. Physik A - Atomic Nuclei

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The hyperfine structure and isotope shift of 1~ and l~ have been investigated by means of collinear fast-beam laser spectroscopy in the resonance line at 2= 451 nm. The indium isotopes were prepared at the GSI on-line mass separator following a fusion evaporation reaction. For the first time, a FEBIAD ion source with bunched release of indium was used. Magnetic dipole moments, electric quadrupole moments and isotope shifts were determined. The present results lead us to assign the spin I=2 to the 1~ (T1/2=40 min) state. Spins and moments are discussed in the framework of the j j-coupling model.

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Section: Methodsmentioning

confidence: 99%

“…Collinear laser spectroscopy on a secondary beam of mass separated atoms of 1~ has been performed at the GSI on-line mass separator [10,11]. l~ and 1~…”

Section: Methodsmentioning

confidence: 99%

Collinear laser spectroscopy on108g, 108m In using an ion source with bunched beam release

Eberz

Dinger

Horiguchi

et al. 1986

Z. Physik A - Atomic Nuclei

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“…The 25-MV tandem accelerator, which will serve as the primary accelerator for RIBS at the HRIBF, is presently being utilized to implant stable complements of interesting radioactive atoms into refractory targets maintained in the on-line FEBIAD [3] ion source which is the standard source used at the UNISOR facility [2]. The final energy of the implanted species, after passing through a thin Ta entrance window, is chosen so that the ions penetrate to a depth of 2 to 35 pm in a thin circular disk (-9 mm in diameter and -1.5 mm in thickness) of the material of interest.…”

Section: Experimental Apparatus and Proceduresmentioning

confidence: 99%

“…The method can also be used, as well, for determining diffusion coefficients for many elemenvtarget combinations which are fundamentally important toward the understanding of the kinetics and chemistry of the diffusion process. Experiments [4, 51 are underway at the HRlBF which utilize the 25 MV tandem accelerator to implant stable complements of interesting radioactive atoms into refractory targets mounted in the UNISOR [2] version of the FEBIAD ion source [3]. The objective of these studies is to select the refractory target material most appropriate for swift release of the element of interest, as well as to make realistic estimates of the efficiency of ion sources prior to actual radioactive ion beam (RIB) generation.…”

Section: Introductionmentioning

confidence: 99%

Selection of RIB targets using ion implantation at the Holifield Radioactive Ion Beam Facility

Alton

Dellwo

1996

Nuclear Instruments and Methods in Physics Research Section A:

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Among several major challenges posed by generating and accelerating adequate intensities of RIBs, selection of the most appropriate target material is perhaps the most difficult because of the requisite fast and selective thermal release of minute amounts of the shod-lived product atoms from the ISOL target in the presence of bulk amounts of target material. Experimental studies are under way at t h e Oak Ridge National Laboratory (ORNL) which are designed to measure the time evolution of implanted elements diffused from refractory target materials which are candidates for forming radioactive ion beams (RIBs) at the Holifield Radioactive Ion Beam Facility (HRIBF). The diffusion coefficients are derived by comparing experimental data with numerical solutions to a one-dimensional form of Fick's second law for ion implanted distributions. In this report, we describe the experimental arrangement, experimental procedures, and provide time release data and diffusion coefficients for releasing ion implanted 37Cl from ZrgSi3 and 75As, 79Br, and 78Se from ZrgGeg and estimates of t h e diffusion coefficients for 35Cl, 63Cu, 65Cu, 69Ga and 7lGa diffused from BN; %I, 63Cu, %u, 69Ga, 75As, and 78Se diffused from C; 35C1, 68Cu, e9Ga, 75As, and 78Se diffused from Ta.

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“…The source incorporates design features embodied in the on-line sources used at CERN-ISOLDE [4] and is equipped with a standard Xe leak that serves as a relative monitor of the performance of the source during online operation. The EBPIS utilizes the ionization principles incorporated in the FEBIAD ion source developed by Kirchner, et al [8][9][10] in that it does not require a minimum pressure for stable operation (commonly referred to as the Langmuir criterion for stable discharge). It operates at pressures of more than one order of magnitude lower than the Nielsen plasma discharge source [11] as clearly demonstrated by Kirchner and Roeckl [12].…”

Section: The Electron Beam Plasma Ion Source (Ebpis)mentioning

confidence: 99%

High-efficiency target-ion sources for RIB generation

Alton¹

Proceedings of International Conference on Particle Accelerators

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In this report, emphasis is placed on issues related to selection and design of high-temperature, ion sources that have demonstrated the high ionization efficiency, species versatility, and operational reliability required at ISOL based radioactive ion beam facilities. In designing sources for ISOL applications, careful attention must be given to the following: selecting the most appropriate materials of construction, coupling of the vapor transport system, ion optics, operational parameters, thermal transport properties, emittances, ionization efficiencies and engineering details for safe handling in the high-level radioactivity radiation fields incumbent at such facilities. Included in the article are descriptions and performance data for high temperature, positive (electron-impact and surface-ionization) and negative (kinetic-ejection and surface-ionization) ion sources, as well as, low temperature, batch-mode negative-ion sources, developed for processing long-lived isotopes, that have been principal contributors to recent successes held at the Holifield Radioactive Ion Beam Facility.

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Intense beams of mass-separated, neutron-deficient indium, tin, thallium and lead isotopes

Cited by 44 publications

References 15 publications

Collinear laser spectroscopy on108g, 108m In using an ion source with bunched beam release

Collinear laser spectroscopy on108g, 108m In using an ion source with bunched beam release

Selection of RIB targets using ion implantation at the Holifield Radioactive Ion Beam Facility

High-efficiency target-ion sources for RIB generation

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