Elsevier

Nuclear Physics

Volume 32, April–May 1962, Pages 470-481
Nuclear Physics

Energy levels in 16N from 15N(n, n)15N elastic scattering

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Abstract

Elastic 15N(n, n)15N scattering is studied in the neutron energy range between 1.9 and 3.5 MeV by the recoil particle method. A 15N2 filled proportional counter is used. The total cross section is measured by integral pulse counting and angular distributions are deduced from pulse-height distributions. The result is presented as a total cross section curve and Legendre polynomial expansion coefficients (B0 through B4) of angular distributions at 50 neutron energies. Analysis is made in terms of levels in 16N in the region between 4.3 and 5.8 MeV excitation. Evidence is found for the 2 broad single-particle states(1p1/2)−1 ld3/2 with Jπ = 1 and 2 predicted by the shell model, at an excitation energy of about 5.0 MeV. Six narrower levels are found, spins and parities of which are partly determined.

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