Auger decay rates of antiprotonic helium

Kartavtsev, O. I.; Monakhov, D.E.; Fedotov, S. I.

doi:10.1103/physreva.61.062507

Cited by 20 publications

(8 citation statements)

References 16 publications

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“…Some of these resonance states have a very long lifetime ( 1 ps) against (Auger) decay channels and were vigorously investigated in laser spectroscopic experiments [11,12]. The atomic properties of antiprotonic helium measured in the experiments can be compared with elaborate calculations based on the variational method [13][14][15][16][17]. The high-precision study of antiprotonic helium has an important contribution to the determination of fundamental physical constants such as thep mass [11,12].…”

Section: Introductionmentioning

confidence: 99%

Cross sections for antiproton capture by helium ions

Sakimoto

2010

Phys. Rev. A

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Accurate quantum-mechanical calculations are carried out for antiproton capture by singly ionized He ions, that is,p + He + →pHe 2+ + e, by the combined use of an R-matrix method and direct numerical solution. The total capture cross sections (or collision strengths) and the state distributions of the capture products,pHe 2+ , are calculated at collision energies ranging from 0 to 4 eV. The present system is rich in resonances, which appear as a Rydberg series and are characterized as an electron attached to an ion core,pHe 2+ . Some resonance levels can be reproduced by a reasonable model based on molecular-quantum-defect theory. The capture into the highest energetically possible state of the products,pHe 2+ , always takes place overwhelmingly in the presence or absence of the resonances. However, owing to the resonances, the angular momentum distribution of the products varies considerably depending on the collision energy. The energy-averaged capture cross sections and the capture rate coefficients are also presented for the convenience of future experiments.

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Section: Introductionmentioning

confidence: 99%

Cross sections for antiproton capture by helium ions

Sakimoto

2010

Phys. Rev. A

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“…Theoretical calculations [3] show that the resonance daughter state (n, ) = (17, 14) strongly couples to an electronically excited state of π 4 He + . This is expected to destabilize the daughter state during atomic collisions, as was seen in the case of pHe + [51][52][53].…”

Section: Resultsmentioning

confidence: 99%

Recent progress of laser spectroscopy measurements of pionic helium

Hori

Aghai-Khozani²,

Sótér³

et al. 2022

EPJ Web Conf.

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“…No significant signal was observed. The coupling of the resonance daughter state (n, ) = (17,14) to an electronically excited state of π 4 He + is theoretically expected to cause large scalar and tensor polarizabilities of amplitudes 4 × 10 4 and 70 atomic units, respectively [6], and this is believed to destabilize the daughter state against atomic collisions [60,61].…”

Section: Resultsmentioning

confidence: 99%