Abstract
An upper limit of 1.5×10−4 was measured for the branching ratio of the doublephoton to single-photon transition from the 2.2 MeV np capture state to the ground state of the deuteron. This result was obtained in a coincidence experiment with two Ge(Li) detectors. Based on the total cross section of 334.2 mb for the thermal neutron capture in hydrogen, the upper limit corresponds to a cross section of 49 μb for the two-photon emission in the energy region 46 keV<E γ<2177 keV.
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On leave of absence from the Central Research Institute for Physics, Budapest, Hungary.
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Wüst, N., Güven, H.H., Kardon, B. et al. Experiment on doubly radiative thermal neutron capture in hydrogen. Z Physik A 274, 349–351 (1975). https://doi.org/10.1007/BF01434046
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DOI: https://doi.org/10.1007/BF01434046