Use of refractory oxides, carbides and borides as targets for on-line mass separation

Ravn, H.L.; Björnstad, T.; Hoff, P.; Jönsson, O.; Kugler, E.; Sundell, S.; Vosicki, B.

doi:10.1016/0168-583x(87)90748-8

Cited by 43 publications

(18 citation statements)

References 7 publications

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“…38,39 Cl [1]. Therefore, we conclude that only a small fraction (< 10%) of 34 Cl is produced in the metastable state, and the ground state yield is not significantly affected by it. Figure 34 represents the fit to the data for bromine isotopes in a 13 g/cm 2 uranium-carbide target with a negative surface ion source.…”

Section: Chlorinementioning

confidence: 99%

“…The saturation efficiency is 11%. 34 Cl with 1.5 s ground-state half-life is also produced in a metastable state with 32 minutes half-life. However, the yields in the metastable state are more than one order of magnitude lower than those of the isotopes with comparable half-lives, e.g.…”

Section: Chlorinementioning

confidence: 99%

“…Often composite targets like carbides are used to provide the thermal stability up to high temperatures. Therefore, extraction optimization is another important consideration in the choice of the target material [29,30,31,32,33,34,35].…”

Section: Nuclide Production and Extraction Mechanisms In Isol Targetsmentioning

confidence: 99%

“…The yields from uranium carbide are of the same size as those from titanium already at A=26, and extend to much more neutron rich and shorter-lived isotopes. The yields of 33,34 Na have been measured by the detection of the β-delayed neutrons, assigning all of the detected neutrons to Na. However, this procedure is vulnerable to contaminations from 33,34 Al that also emit β-delayed neutrons.…”

Section: Sodiummentioning

confidence: 99%

“…The yields of 33,34 Na have been measured by the detection of the β-delayed neutrons, assigning all of the detected neutrons to Na. However, this procedure is vulnerable to contaminations from 33,34 Al that also emit β-delayed neutrons. Therefore, the yields for these two isotopes are most probably overestimated [60].…”

Section: Sodiummentioning

confidence: 99%

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Systematic comparison of ISOLDE-SC yields with calculated in-target production rates

Lukić

Gevaert

Kelić

et al. 2006

Nuclear Instruments and Methods in Physics Research Section A:

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Recently, a series of dedicated inverse-kinematics experiments performed at GSI, Darmstadt, has brought an important progress in our understanding of proton and heavy-ion induced reactions at relativistic energies. The nuclear reaction code ABRABLA that has been developed and benchmarked against the results of these experiments has been used to calculate nuclide production cross sections at different energies and with different targets and beams. These calculations are used to estimate nuclide production rates by protons in thick targets, taking into account the energy loss and the attenuation of the proton beam in the target, as well as the low-energy fission induced by the secondary neutrons. The results are compared to the yields of isotopes of various elements obtained from different targets at CERN-ISOLDE with 600 MeV protons, and the overall extraction efficiencies are deduced. The dependence of these extraction efficiencies on the nuclide half-life is found to follow a simple pattern in many different cases. A simple function is proposed to parameterize this behavior in a way that quantifies the essential properties of the extraction efficiency for the element and the targetion-source system in question.

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Section: Chlorinementioning

confidence: 99%

Section: Chlorinementioning

confidence: 99%