Journal ArticleDOI
Continuous angular scanning with a curved-crystal spectrometer
W. Beer,Th.v. Ledebur,W. Schoeps +2 more
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TLDR
In this paper, a new measuring system for a curved-crystal spectrometer is described, which employs speed-regulated commutatorless dc motors which allow continuous scanning of the angular range of a reflex.About:
This article is published in Nuclear Instruments and Methods.The article was published on 1978-11-01. It has received 9 citations till now. The article focuses on the topics: Spectrometer & Angular velocity.read more
Citations
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Journal ArticleDOI
New precision measurements of the muonic X-ray transition in 24Mg and 28Si: Vacuum polarisation test and search for muon-hadron interactions beyond QED
I. Beltrami,B. Aas,W. Beer,G. De Chambrier,P.F.A. Goudsmit,Th.v. Ledebur,H.J. Leisi,W. Ruckstuhl,W.W. Sapp,G. Strassner,A. Vacchi,U. Kiebele,J.-A. Pinston,R. Weber +13 more
TL;DR: In this article, an improved muonic-atom experiment was performed to search for long-range muon-hadron interactions, where the authors measured the wavelengths of the 3 d 5 2 −2 p 3 2 X-ray transitions in 24Mg and 28Si with the bent-crystal spectrometer at the SIN muon channel.
Journal ArticleDOI
Precision measurement of the 2p-1s transition in muonic 12C: Search for new muon-nucleon interactions or accurate determination of the rms nuclear charge radius
W. Ruckstuhl,B. Aas,W. Beer,I. Beltrami,K. Bos,P.F.A. Goudsmit,H.J. Leisi,G. Strassner,A. Vacchi,F.W.N. de Boer,U. Kiebele,R. Weber +11 more
TL;DR: In this article, the wavelength of the 2 p 3 2 - ls 1 2 transition in muonic 12C was measured with a crystal spectrometer as 16.473765 (88) pm.
Journal ArticleDOI
Spectroscopic quadrupole moments of 25Mg and 27Al from muonic X-rays☆
R. Weber,Beat Jeckelmann,J. Kern,U. Kiebele,B. Aas,W. Beer,I. Beltrami,K. Bos,G. De Chambrier,P.F.A. Goudsmit,H.J. Leisi,W. Ruckstuhl,G. Strassner,A. Vacchi +13 more
TL;DR: In this paper, the authors measured the 3d 5 2 -2p 3 2 X-ray transitions in muonic 25Mg and 27Al and derived the electric field gradients at the nucleus (in units of e · a0−3, where a0 is the Bohr radius).
Journal ArticleDOI
Precision measurement of the wavelengths and natural line widths of 3d-2p pionic X-ray transitions in low-Z atoms
G. De Chambrier,W. Beer,F.W.N. de Boer,K. Bos,A. I. Egorov,M. Eckhause,K.L. Giovanetti,P.F.A. Goudsmit,Beat Jeckelmann,K.E. Kir'yanov,L.N. Kondurova,L.P. Lapina,H.J. Leisi,V.I. Marushenko,A.F. Mezentsev,A.A. Petrunin,A.G. Sergeev,Aleksandr I. Smirnov,G. Strassner,V.M. Suvorov,A. Vacchi,D. Wieser +21 more
TL;DR: In this article, the wavelengths and the natural line widths of the 3d-2p transitions in the pionic atoms of 12 C, 16 O, 18 O, 24 Mg, 26 Mg and 28 Si have been measured at SIN with a bent-crystal spectrometer.
Journal ArticleDOI
Crystal spectrometer for measurements of pionic X-rays
W. Beer,K. Bos,G. De Chambrier,K.L. Giovanetti,P.F.A. Goudsmit,B.V. Grigoryev,Beat Jeckelmann,L. Knecht,L.N. Kondurova,J. Langhans,H.J. Leisi,P.M. Levchenko,V.I. Marushenko,A.F. Mezentsev,H. Obermeier,A.A. Petrunin,U. Rohrer,A.G. Sergeev,S.G. Skornjakov,Aleksandr I. Smirnov,E. Steiner,G. Strassner,V.M. Suvorov,A. Vacchi +23 more
TL;DR: In this paper, a bent-crystal spectrometer for pionic X-rays is described, which makes use of a combined π-production-X-ray target.
References
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Journal ArticleDOI
Das fokussierende kristallspektrometer der universität fribourg
O. Piller,W. Beer,J. Kern +2 more
TL;DR: In this paper, a DuMond type curved crystal spectrometer is described, where the crystal and collimator are rotated by independent precision gears driven by stepmotors.
Journal ArticleDOI
The precision determination of some γ-ray energies using the Fribourg curved-crystal spectrometer
TL;DR: In this paper, the energies of several γ-rays from the decay of 169 Yb, 170 Tm and 192 Ir were determined with the Fribourg curved-crystal spectrometer, using a 4 mm thick [110] quartz plate.
Journal ArticleDOI
Biegevorrichtungen für fokussierende kristallspektrometer
TL;DR: In this paper, a pendulum system was constructed to fabricate, usually within two to four hours, a pair of blocks to curve crystal plates by the imprisonment method, and the obtained average precision was ± 1 μm.
Journal ArticleDOI
Determination of Strong-Interaction Widths and Shifts of Pionic X-Rays with a Crystal Spectrometer
Felix Boehm,A. A. Hahn,H. Henrikson,J.P. Miller,R. J. Powers,Petr Vogel,J.-L. Vuilleumier,Kwanghsi Wang +7 more
TL;DR: In this paper, the pionic 3d-2p atomic transitions in F, Na, and Mg have been studied using a bent crystal spectrometer, and the observed energies and widths of the transitions are E=41679(3) eV and Γ=21(8) eVM, E=62434(18) eM, and