Pion capture in hydrogen: chemical aspects

Horváth, D.

doi:10.1007/bf01027982

Cited by 3 publications

(2 citation statements)

References 31 publications

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“…This enables the use of dilute gas targets [12] which provide single-collision conditions, thus yielding clean x-ray spectra. Finally, the deceleration capability of storage rings allows measurements at various velocities, in particular below the production threshold of the specific ion species (typically some 100 MeVu −1 for the heaviest one-and two-electron ions) [3,13,14].…”

Section: Introductionmentioning

confidence: 99%

Integration of maXs-type microcalorimeter detectors for high-resolution x-ray spectroscopy into the experimental environment at the CRYRING@ESR electron cooler

et al. 2022

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We report on the ﬁrst integration of novel metallic magnetic (micro-) calorimeter detectors, developed within SPARC (Stored Particles Atomic Physics Research Collaboration), into the experimental environment of storage rings at GSI, Darmstadt, namely at the electron cooler of CRYRING@ESR. Two of these detector systems were positioned at the 0° and 180° view ports of the cooler section to obtain high-resolution x-ray spectra originating from a stored beam of hydrogen-like uranium interacting with the cooler electrons. While previous test measurements with microcalorimeters at the accelerator facility of GSI were conducted in the mode of well-established stand-alone operation, for the present experiment we implemented several notable modiﬁcations to exploit the full potential of this type of detector for precision x-ray spectroscopy of stored heavy ions. Among these are a new readout system compatible with the multi branch system data acquisition platform of GSI, the synchronization of a quasi-continuous energy calibration with the operation cycle of the accelerator facility, as well as the ﬁrst exploitation of the maXs detectors’ time resolution to apply coincidence conditions for the detection of photons and charge-changed ions.

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Section: Introductionmentioning

confidence: 99%

Integration of maXs-type microcalorimeter detectors for high-resolution x-ray spectroscopy into the experimental environment at the CRYRING@ESR electron cooler

et al. 2022

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“…The nuclear π − capture ratio, or fraction of π − captured on the nucleus of Hydrogen or other element, X, has been measured in various hydrides H m X n [1][2][3] and studied for its dependence on chemical structure [4][5][6][7], and other physical parameters [8,9]. Although these studies have demonstrated that the molecular structure of the compound significantly influences the nuclear π − capture ratio, the detailed understanding of the mechanism of capture of π − , which may include capture into Rydberg pion-molecular orbitals, transition to pion-atomic orbitals, and transfer from Hydrogen atom to other atom, is far from complete [12][13][14].…”

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confidence: 99%