Elsevier

Nuclear Physics A

Volume 274, Issues 1–2, 7–14 December 1976, Pages 45-52
Nuclear Physics A

Beta-delayed neutron emission following the decay of 17N

https://doi.org/10.1016/0375-9474(76)90225-6Get rights and content

Abstract

The delayed neutron spectrum following β decay of the 4.17 sec 17N has been measured with high-resolution 3He spectrometers. The intensities of the neutron branches from levels in 17O at 4549.3 ± 1.3, 5081 ± 21, 5387.1 ± 1.2 and 5949.9 ± 1.9 keV excitation energy result in 17N β transitions of (34.8 ± 2.6), (0.6 ± 0.4), (52.7 ± 3.5) and (7.0 ± 0.5)%, respectively. The neutron widths of these states were determined as 54.8 ± 0.4, 113 ± 55, 63.2±1.1 and 60.5 ± 3.2 keV, respectively, in disagreement with previously reported values. The results are compared with theoretical calculations and with the mirror decay of 17Ne.

References (24)

  • R.J. De Meijer et al.

    Nucl. Phys.

    (1973)
  • D.H. Wilkinson

    Phys. Lett.

    (1974)
  • F. Ajzenberg-Selove

    Nucl. Phys.

    (1971)
  • J.T. Routti et al.

    Nucl. Instr.

    (1969)
  • L. Tomlinson

    Atomic Data and Nucl. Data Tables

    (1973)
  • G. Bertsch et al.

    Nucl. Phys.

    (1970)
  • I.S. Towner et al.

    Nucl. Phys.

    (1972)
  • G.J. Perlow et al.

    Phys. Rev.

    (1961)
  • J. Gilat et al.

    Report ORNL-3488

    (1963)
  • J.M. Cuttler et al.
  • H. Franz

    Doctoral Dissertation

    (1972)
  • A.R. Poletti et al.

    Phys. Rev.

    (1973)
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