PBAR: A code for calculating the electromagnetic contribution to the energy levels of antiprotonic atoms

Borie, E.; Jödicke, B.

doi:10.1063/1.168312

Cited by 8 publications

(4 citation statements)

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“…The measured energies for those transitions not affected by strong interaction (the N and M series) agree with those calculated using the computer code PBAR [14] or the results taken from E15, 16]. The accuracy of the energy determination ranges from 5 to 15 eV for the various detectors, measuring periods, and transition energies, including about 3 eV from the uncertainty of the energy calibration.…”

Section: Strong-interaction Energy Shift and Broadeningsupporting

confidence: 71%

“…Theoretical predictions of hadronic shifts and widths and the results of the other experiments are also included in Table 3. The electro-magnetic transition energies of the Le transitions are 10.440 keV for /53He and 11,129 keV for /34He [14,15]. The expected hadronic width of the 1 s level is several keV Table 3.…”

Section: Strong-interaction Energy Shift and Broadeningmentioning

confidence: 95%

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X-rays from antiprotonic3He and4He

Schneider¹,

Bacher²,

Blüm³

et al. 1991

Z. Physik A - Hadrons and Nuclei

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Antiprotonic X-rays from the helium isotopes have been observed at pressures of 36, 72, 375 and 600 mbar. The antiproton beam from LEAR with momenta of 309 and 202 MeV/c has been stopped at these pressures using the cyclotron trap. The X-rays were detected with Si(Li) and intrinsic Ge semiconductor detectors. Absolute Xray yields were determined and the strong-interaction 2p shifts and the 2p and 3 d broadenings measured to be Ezp=(-17_+4)eV, F2p=(25_+9)eV and Fad=(2.14 _+0.18)meV for /~3He and ezp=(-18+_2)eV, F2. =(45_+5) eV and Fad =(2.36 +0.10) meV for/54He.

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Section: Strong-interaction Energy Shift and Broadeningsupporting

confidence: 71%

Section: Strong-interaction Energy Shift and Broadeningmentioning

confidence: 95%

X-rays from antiprotonic3He and4He

Schneider¹,

Bacher²,

Blüm³

et al. 1991

Z. Physik A - Hadrons and Nuclei

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“…5. The energies of the transitions were obtained from the code PBAR [14]. The absolute efficiency calibration was obtained by an in-beam measurement with a calibrated standard S7Co source.…”

Section: Calibration Of the Detectorsmentioning

confidence: 99%

Precision measurement of antiprotonic hydrogen and deuterium X-rays

Heitlinger

Bacher

Badertscher

et al. 1992

Z. Physik A - Hadrons and Nuclei

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X-rays from antiprotonic hydrogen and deuterium have been measured at low pressures. Using the cyclotron trap, a 105 MeV/c antiproton beam from LEAR was stopped with an efficiency of 86% in 30 mbar hydrogen gas in a volume of only 100 cm 3. The X-rays were measured with Si(Li) detectors and a Xe-CH 4 drift chamber. The strong interaction shift and broadening of the Lyman e transition and the spin-averaged 2p width in antiprotonic hydrogen was measured with unprecedented accuracy. The triplet component of the ground state in antiprotonic hydrogen was determined for the first time.

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“…A detailed discussion of these various corrections for muonic atoms has been given by Borie and Rinker (1982) and a computer program, MUON, based on that work has been published by Rinker (1979). Recently some details of the extension of the M U O N program to antiprotonic atoms have been given by Borie and Jodicke (1988).…”

Section: Calculation Of Electromagnetic Energiesmentioning

confidence: 99%

Antiprotonic-hydrogen atoms

Batty

1989

Rep. Prog. Phys.

128

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Experimental studies of antiprotonic-hydrogen atoms have recently made great progress following the commissioning of the low-energy antiproton facility LEAR at CERN in 1983. At the same time our understanding of the atomic cascade has increased considerably through measurements of the x-ray spectra.The life history of the p-p atom is considered in some detail, from the initial capture of the antiproton when stopping in hydrogen, through the atomic cascade with the emission of x-rays, to the final antiproton annihilation and production of mesons. The experiments carried out at LEAR are described and the results compared with atomic cascade calculations and predictions of strong interaction effects.

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PBAR: A code for calculating the electromagnetic contribution to the energy levels of antiprotonic atoms

Abstract: This article describes briefly the physical effects contributing to the energy levels of antiprotonic atoms and provides a description of a code PBAR that has been written to calculate the electromagnetic contribution.

Cited by 8 publications

References 0 publications

X-rays from antiprotonic3He and4He

X-rays from antiprotonic3He and4He

Precision measurement of antiprotonic hydrogen and deuterium X-rays

Antiprotonic-hydrogen atoms

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