Pionic and muonic X-ray transitions in liquid helium

G. Backenstoss; J. Egger; T. von Egidy; R. Hagelberg; C. J. Herrlander; H. Koch; H. P. Povel; A. Schwitter; L. Tauscher

doi:10.1016/0375-9474(74)90637-X

Pionic and muonic X-ray transitions in liquid helium

G. Backenstoss
, J. Egger
, T. von Egidy
, R. Hagelberg
, C. J. Herrlander
, H. Koch
, H. P. Povel
, A. Schwitter
, L. Tauscher

European Organization for Nuclear Research
University of Karlsruhe
Research Institute for Physics

Research output: Contribution to journal › Article › peer-review

51 Scopus citations

Abstract

Energies and intensities of pionic and muonic X-rays in liquid ⁴He have been measured with a Si (Li) detector. The energy shift due to strong interaction effects of the pionic 1s level in ⁴He was determined to be -75.7±2.0 eV. The natural line width of this level is 45±3 eV. These values are compared with different theoretical predictions. Cascade calculations, including external Auger effect and sliding transitions, have been performed to reproduce the yields of the muonic and pionic transitions. The pionic 2p level width is deduced: Γ_2p = (1.1 ± 0.5) × 10¹² sec^-1 = (7.2±3.3) × 10^-4 eV.

Original language	English
Pages (from-to)	519-532
Number of pages	14
Journal	Nuclear Physics, Section A
Volume	232
Issue number	2
DOIs	https://doi.org/10.1016/0375-9474(74)90637-X
State	Published - 4 Nov 1974
Externally published	Yes

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@article{53b0e4b2ed6643cbb1f3a24ddc88f513,

title = "Pionic and muonic X-ray transitions in liquid helium",

abstract = "Energies and intensities of pionic and muonic X-rays in liquid 4He have been measured with a Si (Li) detector. The energy shift due to strong interaction effects of the pionic 1s level in 4He was determined to be -75.7±2.0 eV. The natural line width of this level is 45±3 eV. These values are compared with different theoretical predictions. Cascade calculations, including external Auger effect and sliding transitions, have been performed to reproduce the yields of the muonic and pionic transitions. The pionic 2p level width is deduced: Γ2p = (1.1 ± 0.5) × 1012 sec-1 = (7.2±3.3) × 10-4 eV.",

author = "G. Backenstoss and J. Egger and \{von Egidy\}, T. and R. Hagelberg and Herrlander, \{C. J.\} and H. Koch and Povel, \{H. P.\} and A. Schwitter and L. Tauscher",

note = "Funding Information: We wish to thankI . BergstromH, . Daniel, M. Ericson,T . E. 0. Ericson,J . Htifner, M. Krell, N. J. Mang and E. Zavattini for many heIpfu1d iscussionsW. e are very much indebtedt o L. Mazzone and his hydrogent arget group at CERN for the perfect construction of the target and for assistanced uring the operation. The technicals upporto f A. Engstriim,N . Hasslera ndK. Rolli is gratefullya cknowledged. This work wass upportedb y the GermanB undesministeriumfu r Bildungu nd Wissen-schaft.",

year = "1974",

month = nov,

day = "4",

doi = "10.1016/0375-9474(74)90637-X",

language = "English",

volume = "232",

pages = "519--532",

journal = "Nuclear Physics, Section A",

issn = "0375-9474",

publisher = "Elsevier B.V.",

number = "2",

}

TY - JOUR

T1 - Pionic and muonic X-ray transitions in liquid helium

AU - Backenstoss, G.

AU - Egger, J.

AU - von Egidy, T.

AU - Hagelberg, R.

AU - Herrlander, C. J.

AU - Koch, H.

AU - Povel, H. P.

AU - Schwitter, A.

AU - Tauscher, L.

N1 - Funding Information: We wish to thankI . BergstromH, . Daniel, M. Ericson,T . E. 0. Ericson,J . Htifner, M. Krell, N. J. Mang and E. Zavattini for many heIpfu1d iscussionsW. e are very much indebtedt o L. Mazzone and his hydrogent arget group at CERN for the perfect construction of the target and for assistanced uring the operation. The technicals upporto f A. Engstriim,N . Hasslera ndK. Rolli is gratefullya cknowledged. This work wass upportedb y the GermanB undesministeriumfu r Bildungu nd Wissen-schaft.

PY - 1974/11/4

Y1 - 1974/11/4

N2 - Energies and intensities of pionic and muonic X-rays in liquid 4He have been measured with a Si (Li) detector. The energy shift due to strong interaction effects of the pionic 1s level in 4He was determined to be -75.7±2.0 eV. The natural line width of this level is 45±3 eV. These values are compared with different theoretical predictions. Cascade calculations, including external Auger effect and sliding transitions, have been performed to reproduce the yields of the muonic and pionic transitions. The pionic 2p level width is deduced: Γ2p = (1.1 ± 0.5) × 1012 sec-1 = (7.2±3.3) × 10-4 eV.

AB - Energies and intensities of pionic and muonic X-rays in liquid 4He have been measured with a Si (Li) detector. The energy shift due to strong interaction effects of the pionic 1s level in 4He was determined to be -75.7±2.0 eV. The natural line width of this level is 45±3 eV. These values are compared with different theoretical predictions. Cascade calculations, including external Auger effect and sliding transitions, have been performed to reproduce the yields of the muonic and pionic transitions. The pionic 2p level width is deduced: Γ2p = (1.1 ± 0.5) × 1012 sec-1 = (7.2±3.3) × 10-4 eV.

UR - https://www.scopus.com/pages/publications/0342578358

U2 - 10.1016/0375-9474(74)90637-X

DO - 10.1016/0375-9474(74)90637-X

M3 - Article

AN - SCOPUS:0342578358

SN - 0375-9474

VL - 232

SP - 519

EP - 532

JO - Nuclear Physics, Section A

JF - Nuclear Physics, Section A

IS - 2

ER -

Pionic and muonic X-ray transitions in liquid helium

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