Elsevier

Nuclear Physics

Volume 39, December 1962, Pages 325-334
Nuclear Physics

α-Particles emitted from 14 MeV neutron interactions with light and medium-weight nuclei

https://doi.org/10.1016/0029-5582(62)90396-6Get rights and content

Abstract

A study of α-particles emitted as a result of 14 MeV, neutron interactions with Na23, Mn55 and As75 was undertaken by the emulsion technique making use of 200 μm Ilford C2 plates.

The energy distribution seems to be completely Maxwellian with a peak value ranging from 4–5 MeV alpha energy with an excessive emission of alpha particles on the low-energy side. The angular distribution in the c.m. system is anisotropic, but approximately symmetrical about 90°. A semi-log plot of relative level densities of the residual nuclei calculated from the alpha energy fits a straight line except on the low energy side where it becomes concave upwards; this curvature becomes more pronounced for higher mass numbers. The cross-section for Mn55 is estimated to be ≈ 86 mb±10%. The temperature of the residual nuclei has been found to be an increasing function of mass number. The results obtained in the cases of Na23, Mn55 and As75 are discussed in detail.

References (24)

  • O.N. Kaul

    Nuclear Physics

    (1962)
  • O.N. Kaul

    Nuclear Physics

    (1962)
  • P.C. Gugelot

    Phys. Rev.

    (1951)
  • D.M. Thomson
  • P.C. Gugelot

    Phys. Rev.

    (1951)
  • R.M. Eisberg et al.

    Phys. Rev.

    (1954)
  • R. Britten

    Phys. Rev.

    (1952)
  • E.R. Graves et al.

    Phys. Rev.

    (1953)
  • B.G. Whitmore et al.

    Phys. Rev.

    (1951)
  • Eisberg et al.

    Phys. Rev.

    (1958)
  • Brookhaven National Laboratory Report, BWL-331

    (1955)
  • Isao Kumabe

    Phys. Rev.

    (1957)
  • Cited by (3)

    • Entrance channel effects on the alpha decay probabilities of neutron and proton induced reactions for target mass A=55

      2020, Nuclear Physics A
      Citation Excerpt :

      However, we do not observe difference in the results with and without width fluctuation corrections in the energy ranged considered. To optimize the models and parameters used in Talys-1.9, we performed calculations using six different level density models and eight different gamma ray strength functions available in Talys-1.9 which are compared with available experimental data [35–53] taken from EXFOR database [54] and evaluated data taken from evaluated nuclear data libraries TENDL-2017 [64] and ENDF/B-VII.0 [65] which is shown in Fig. 3. It can be seen that the reference cross section obtained using LDM4 best match the available experimental data and the evaluated nuclear data files of TENDL-2017 and ENDF/B-VII.0 whereas the gamma ray strength functions do not have significant effects for a given level density model.

    Results for As75 and Na23 are given in refs. 14, 15).

    View full text