Production and acceleration of 48Ca-beams with the ECR source in the JINR-GANIL experiment

doi:10.1016/0168-583X(90)90051-U

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

Volume 47, Issue 1, 1 March 1990, Pages 102-105

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Abstract

The results of production and acceleration of ⁴⁸Ca-beams with an Electronic Cyclotron Resonance ion source are described. For this purpose a special technique has been developed which allows the metal to be extracted from the oxide with aluminium as an oxygen acceptor. The mean rate of consumption of ⁴⁸Ca was about 2 mg/h and the beam intensity was about 15 μA on charge state 6. The method for recuperation of used calcium is presented.

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An experiment to the search for very neutron-rich nuclei has been performed at RIKEN, using projectile fragmentation of an intense 64 A MeV ⁴⁸Ca beam and the fragment separator RIPS. Three new neutron-rich isotopes, ³⁴Ne, ³⁷Na and ⁴³Si were observed unambiguously for the first time, and convincing evidence for the particle instability of three others, ³³Ne, ³⁶Na and ³⁹Mg was obtained. The experimental findings are discussed in comparison with recent theoretical predictions.
Search for new neutron-rich nuclei with a 70A MeV 48Ca beam
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The results of an experiment by the RIKEN-JINR collaboration on search for new Ne, Na, Mg, Al isotopes close to the neutron drip line are presented. We found for the first time three new neutron-rich nuclei ³⁸Mg and ^40,41Al. Some clue for particle unstability of ³³Ne was also obtained. These nuclei were produced by the projectile fragmentation of a 70 A MeV ⁴⁸Ca beam on a ¹⁸¹Ta target. The reaction fragments were analyzed by the fragment separator RIPS at RIKEN, and were unambiguously identified by measuring the magnetic rigidity, time-of-flight, energy loss and total kinetic energy.
A 82Kr pilot beam for the accelerator mass spectrometry of 41Ca
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The use of the UNILAC accelerator for the accelerator mass spectrometry (AMS) of ⁴¹Ca has the advantages of a low background and high sensitivity. The problem which prevented precise measurements in the past was the accurate determination of the transmission through the accelerator. Therefore, the possibility of a ⁸²Kr pilot beam was investigated with emphasis on the influence of a small difference in the mass-to-charge ratio on the transmission.
Decay properties of exotic N28 S and Cl nuclei and the Ca48/46Ca abundance ratio
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Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms

Abstract

References (9)

Nucl. Phys.

Preprint GANIL, P88-14

J. Phys. (Paris) C4-C8

Cited by (4)

New neutron-rich isotopes, <sup>34</sup>Ne, <sup>37</sup>Na and <sup>43</sup>Si, produced by fragmentation of a 64 A MeV <sup>48</sup>Ca beam

Search for new neutron-rich nuclei with a 70A MeV <sup>48</sup>Ca beam

A <sup>82</sup>Kr pilot beam for the accelerator mass spectrometry of <sup>41</sup>Ca

Decay properties of exotic N28 S and Cl nuclei and the Ca48/46Ca abundance ratio