Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: N=90 region: The decays of {152m,g}Eu to 152Sm   The decays of {152m,g}Eu to 152Sm have been studied by gamma-ray spectroscopy
using the 8pi Spectrometer, an array of 20 Compton-suppressed Ge detectors.
Very weak gamma-decay branches in 152Sm were investigated through gamma-gamma
coincidence spectroscopy. All possible E2 transitions between states below 1550
keV with transition energies > 130 keV are observed, including the previously
unobserved 2^+_3 to 0^+_2 401 keV transition. The results, combined with
existing lifetime data, provide a number of new or revised E2 transition
strengths which are critical for clarifying the collective structure of 152Sm
and the N=90 isotones.

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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
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The categories of this paper are: astro-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: math
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol
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The categories of this paper are: eess
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The categories of this paper are: chem-ph
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The categories of this paper are: nlin
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The categories of this paper are: supr-con
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The categories of this paper are: funct-an
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The categories of this paper are: gr-qc
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The categories of this paper are: dg-ga