Measurement of the muonic x-ray cascade in Mg, AI, In, Ho, and Au

Hartmann, F. J.; Bergmann, Ralf B.; Daniel, H.; Pfeiffer, H. J.; Egidy, T. von; Wilhelm, Wilbert E.

doi:10.1007/bf01417434

Cited by 49 publications

(20 citation statements)

References 61 publications

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“…Whereas very good agreement exists between our results and those of Sapp [8] the relative values of TaM et al [3], which are normalized to the pionic (3 ~ 2) intensity, do not agree with our data. Pionic and muonic [14] x-ray intensities for the Balmer and Paschen series of Mg are compared in Fig. 3.…”

Section: Iil Experimental Resultsmentioning

confidence: 99%

Absolute pionic x-ray intensities in Mg and Fe

Hartmann

Daniel

Neumann

et al. 1991

Z. Physik A - Hadrons and Nuclei

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Absolute pionic x-ray intensities have been measured for Mg and Fe. The accuracy achieved was 2% of the line intensity for the most prominent transitions. In the Balmer series of Mg and the Paschen series of Fe the crossover transitions were found to be even more attenuated than the transitions between circular states, as deduced, for example, by comparison with muonic atoms; no crossover transitions were observed in the Fe Balmer series. According to cascade calculations based on the experimental intensities more than half of the pions are absorbed in Fe already from levels with principal quantum number n > 17 by strong interaction.

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Section: Iil Experimental Resultsmentioning

confidence: 99%

Absolute pionic x-ray intensities in Mg and Fe

Hartmann

Daniel

Neumann

et al. 1991

Z. Physik A - Hadrons and Nuclei

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“…The nuclear absorptions are not seen in the muonic exotic atoms (except for high Z targets) and therefore, there is only one parameter, a, to control the X-ray yields at low n states. Table 4 shows the comparison with the experimental data and a cascade model developed by Vogel and Hartmann for the muonic exotic atoms [26,27,28]. The parameters used here were W = 0 MeV (no nuclear absorption), Γ re f = 10 15 s −1 , and a = 0.16, -0.18, -0.01 for Al, Fe and Au targets, obtained by the empirical fit.…”

Section: Parameter Study and Comparison With Experimental Datamentioning

confidence: 99%

A measurement of atomic X-ray yields in exotic atoms and implications for an antideuteron-based dark matter search

Aramaki

Chan

Craig

et al. 2013

Astroparticle Physics

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The General AntiParticle Spectrometer (GAPS) is a novel approach for the indirect dark matter search that exploits cosmic antideuterons. GAPS utilizes a distinctive detection method using atomic X-rays and charged particles from the exotic atom as well as the timing, stopping range and dE/dX energy deposit of the incoming particle, which provides excellent antideuteron identification. In anticipation of a future balloon experiment, an accelerator test was conducted in 2004 and 2005 at KEK, Japan, in order to prove the concept and to precisely measure the X-ray yields of antiprotonic exotic atoms formed with different target materials [1]. The X-ray yields of the exotic atoms with Al and S targets were obtained as ∼ 75%, which are higher than were previously assumed in [2]. A simple, but comprehensive cascade model has been developed not only to evaluate the measurement results but also to predict the X-ray yields of the exotic atoms formed with any materials in the GAPS instrument. The cascade model is extendable to any kind of exotic atom (any negatively charged cascading particles with any target materials), and it was compared and validated with other experimental data and cascade models for muonic and antiprotonic exotic atoms. The X-ray yields of the antideuteronic exotic atoms are predicted with a simple cascade model and the sensitivity for the GAPS antideuteron search was estimated for the proposed long duration balloon program [3], which suggests that GAPS has a strong potential to detect antideuterons as a dark matter signature. A GAPS prototype flight (pGAPS) was launched successfully from the JAXA/ISAS balloon facility in Hokkaido, Japan in summer 2012 [4,5] and a proposed GAPS science flight is to fly from Antarctica in the austral summer of 2017-2018.

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“…To determine the acceptance with muonic x-rays we either (i) used published yield data for individual x-rays [16][17][18][19] or (ii) assumed a yield of unity for the entire K-series. Then we performed a least squares fit of the measured acceptances to a smooth empirical curve to permit interpolation to the interesting γ-ray energies.…”

Section: A Hpge Calibrationmentioning

confidence: 99%

Muon capture on35Cl

et al. 2002

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We report measurements of γ-ray spectra from muon capture on 35 Cl. For the allowed Gamow-Teller transitions to the 35 S(2939, 3/2 + ) state and the 35 S(3421, 5/2 + ) state we obtained their capture rates, hyperfine dependences and γ-ν correlation coefficients. The capture rates and hyperfine dependences were compared to shell model calculations using the complete 1s-0d space and the universal SD interaction. With g p /g a = 6.7 and g a = −1.00 (or g a = −1.26) we found agreement of the model and the data at the 1-2 σ level. However, we caution that the transitions are sensitive to ℓ = 2 forbidden matrix elements.Typeset using REVT E X 1

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Measurement of the muonic x-ray cascade in Mg, AI, In, Ho, and Au

Cited by 49 publications

References 61 publications

Absolute pionic x-ray intensities in Mg and Fe

Absolute pionic x-ray intensities in Mg and Fe

A measurement of atomic X-ray yields in exotic atoms and implications for an antideuteron-based dark matter search

Muon capture on35Cl

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