Level structure of 42K from the 41(n, γ) and 41K(d, p) reactions

B. Krusche, Ch Winter, K. P. Lieb, P. Hungerford, H. H. Schmidt, T. Von Egidy, H. J. Scheerer, S. A. Kerr, H. G. Börner

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The γ-ray spectrum emitted after thermal neutron capture in 41K has been measured with pair and Ge(Li) spectrometers at the ILL high-flux reactor. About 630 transitions have been assigned to the decay of 133 excited states in 42K. The level energies have been determined with a precison of 20 ppm; the neutron binding energy was determined to be EB = 7533.82(15) keV. On the basis of the many transitions to known states, several spin-parity assignments have been made. In addition, high-resolution proton spectra of the reaction 41K(d,p) have been taken at 20MeV deuteron energy with the München Q3D spectrometer. These data have been essential in establishing the newly-found levels and in differentiating between primary and secondary transitions in the (n, γ) work. A statistical analysis of the level density and relative strengths of primary transitions is given.

Original languageEnglish
Pages (from-to)219-252
Number of pages34
JournalNuclear Physics, Section A
Issue number2
StatePublished - 10 Jun 1985


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