Abstract
Schottky mass spectrometry is a novel method of precision nuclear mass spectrometry based on the measurement of the revolution frequencies of cooled ions in storage rings performed by non-destructive frequency analysis of the beam noise, the well-established Schottky diagnosis technique. The method was applied for the first time at the Experimental Storage Ring ESR at GSI observing electron cooled highly charged ions up to bare nuclei at relativistic energies around several hundred MeV/u. To demonstrate the performance and feasibility of the method at the ESR, experimental tests have been carried out using beams of nuclear fragments produced in the ring itself by the interaction of different primary beams with the internal gas jet target. Futhermore, first Schottky mass measurements of secondary nuclear beams produced by projectile fragmentation of Au and Bi primary beams in a thick Be-target were carried out in order to determine the masses for numerous heavy neutron deficient nuclei which had not been measured before. Relative accuracies for the measured mass values in the order of 1×10−6 and below can be achieved. The method is briefly discussed and some early results are presented.
Similar content being viewed by others
References
G. Audi and A.H. Wapstra, Nucl. Phys. A565 (1993) 1.
B. Franzke, Nucl. Instr. and Meth. B24/25 (1987) 18.
J. Borer et al.,Proc. IXth Conf. on High Energy Accel., Stanford, 1974 (U.S. Department of Commerce, 1974) pp. 53–56.
K. Beckert et al.,Proc. 2nd Europ. Part. Accel. Conf., Nice, 1990, eds. P. Marin and P. Mandrillon (Editions Frontieres, Gif-sur-Yvette Cedex, 1990) pp. 777–779.
S. Chattopadhyay, CERN yellow report 84-11 (CERN, Geneva, 1984).
M. Steck et al.,Proc. 4th Europ. Part. Accel. Conf., London, 1994, eds. V. Suller and Ch. Petit-Jean-Genaz (World Scientific, Singapore, 1994) pp. 1197–1199.
B. Schlitt et al., GSI report 95-1 (GSI, Darmstadt, 1995) p. 242.
H. Eickhoff et al., GSI report 95-1 (GSI, Darmstadt, 1995) p. 244.
H. Geissel et al., Nucl. Instr. and Meth. B70 (1992) 286.
H. Geissel et al., Phys. Rev. Lett. 68 (1992) 3412.
B. Franzke et al.,Proc. NOBEL SYMPOSIUM No 91, Lysekil, Sweden, August 21–26, 1994, Physica Scripta, in press.
H. Irnich et al., Phys. Rev. Lett., in press.
F. Nolden et al.,Proc. 1st Europ. Part. Accel. Conf., Rome, 1988, ed. S. Tazzari (World Scientific, Singapore, 1989) pp. 579–581.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Schlitt, B., Beckert, K., Beha, T. et al. Schottky mass spectrometry at the heavy ion storage ring ESR. Hyperfine Interact 99, 117–125 (1996). https://doi.org/10.1007/BF02274915
Issue Date:
DOI: https://doi.org/10.1007/BF02274915