Radiative electron capture in the first-forbidden unique decay of $^{81}\mathrm{Kr}$

Radiative electron capture in the first-forbidden unique decay of ${}^{81}{Kr}$

S. Mianowski, E. Werner-Malento, A. Korgul, M. Pomorski, K. Pachucki, M. Pfützner, B. Szweryn, J. Żylicz, P. Hornshøj, T. Nilsson, and K. Rykaczewski

Phys. Rev. C 82, 044308 – Published 12 October 2010

Abstract

The photon spectrum accompanying the orbital $K$ -electron capture in the first-forbidden unique decay of ${}^{81}{Kr}$ was measured. The total radiation intensity for photon energies larger than 50 keV was found to be $1.42 (22) \times 10^{- 4}$ per $K$ capture. Both the shape of the spectrum and its intensity relative to the ordinary, nonradiative capture rate are compared to theoretical predictions. The best agreement is found for the recently developed model that employs the length gauge for the electromagnetic field.

Received 9 August 2010

DOI:https://doi.org/10.1103/PhysRevC.82.044308

Authors & Affiliations

S. Mianowski¹, E. Werner-Malento^1,*, A. Korgul¹, M. Pomorski¹, K. Pachucki¹, M. Pfützner^1,†, B. Szweryn¹, J. Żylicz¹, P. Hornshøj², T. Nilsson^3,4, and K. Rykaczewski⁵

¹Faculty of Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland
²Institute of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark
³Fundamental Physics, Chalmers University of Technology, Gothenburg, Sweden
⁴CERN, EP-Division, CH-1211, Geneva 23, Switzerland
⁵Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

^*Present address: Institute of Physics, Polish Academy of Science, Al. Lotników 32/46, 02-668 Warsaw, Poland.
^†[email protected]

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Vol. 82, Iss. 4 — October 2010

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Physical Review C

covering nuclear physics

Radiative electron capture in the first-forbidden unique decay of ${}^{81}{Kr}$

S. Mianowski, E. Werner-Malento, A. Korgul, M. Pomorski, K. Pachucki, M. Pfützner, B. Szweryn, J. Żylicz, P. Hornshøj, T. Nilsson, and K. Rykaczewski

Phys. Rev. C 82, 044308 – Published 12 October 2010

Abstract

Authors & Affiliations

Article Text (Subscription Required)

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Physical Review C

covering nuclear physics

Radiative electron capture in the first-forbidden unique decay of Kr81

S. Mianowski, E. Werner-Malento, A. Korgul, M. Pomorski, K. Pachucki, M. Pfützner, B. Szweryn, J. Żylicz, P. Hornshøj, T. Nilsson, and K. Rykaczewski

Phys. Rev. C 82, 044308 – Published 12 October 2010

Abstract

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Radiative electron capture in the first-forbidden unique decay of ${}^{81}{Kr}$