CERN Accelerating science

Article
Report number	arXiv:1008.1918
Title	Radiative electron capture in the first forbidden unique decay of 81Kr
Author(s)	Mianowski, S. (Warsaw U.) ; Werner-Malento, E. (Warsaw U.) ; Korgul, A. (Warsaw U.) ; Pomorski, M. (Warsaw U.) ; Pachucki, K. (Warsaw U.) ; Pfutzner, M. (Warsaw U.) ; Szweryn, B. (Warsaw U.) ; Zylicz, J. (Warsaw U.) ; Hornshoj, P. (Aarhus U.) ; Nilsson, T. (Chalmers U. Tech. ; CERN) ; Rykaczewski, K. (Oak Ridge)
Publication	2010
Imprint	12 Aug 2010
Number of pages	7
Note	Comments: 7 pages, 6 figures
In:	Phys. Rev. C 82 (2010) 044308
DOI	10.1103/PhysRevC.82.044308
Subject category	Nuclear Physics - Experiment
Abstract	The photon spectrum accompanying the orbital K-electron capture in the first forbidden unique decay of 81Kr was measured. The total radiation intensity for the photon energies larger than 50 keV was found to be 1.47(6) x 10^{-4} per K-capture. Both the shape of the spectrum and its intensity relative to the ordinary, non-radiative capture rate, are compared to theoretical predictions. The best agreement is found for the recently developed model which employs the length gauge for the electromagnetic field.

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