The Scattering of Neutrons by Deuterons

Kruger, P. Gerald; Shoupp, W. E.; Watson, R. E.; Stallmann, F.W.

doi:10.1103/physrev.53.1014

Cited by 8 publications

(3 citation statements)

References 5 publications

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“…24,25,26) was measured by putting just enough absorber in front of the third counter to exclude the particles having the previously desired energy. Because of the inelastic proton continuum, backgrounds had to be subtracted for all deuteron runs.…”

Section: A Corrections To the Datamentioning

confidence: 99%

“…15,26) by means of a coincidence circuit just like that used for registering triple coincidences, but connected so a s to register whenever pulses from each of the first two counters occurred simultaneously with a delayed pulse from the third counter. This method was necessary because a large part (1/5 to 1/2, depending on the angle) of the pulses from the first two couxiters were in double,coincidence.…”

Section: A Corrections To the Datamentioning

confidence: 99%

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ELASTIC SCATTERING OF 20.6-MEV PROTONS BY DEUTERONS. Technical Report No. 22

Caldwell¹,

Richardson²

1954

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Section: A Corrections To the Datamentioning

confidence: 99%

Section: A Corrections To the Datamentioning

confidence: 99%

ELASTIC SCATTERING OF 20.6-MEV PROTONS BY DEUTERONS. Technical Report No. 22

Caldwell¹,

Richardson²

1954

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“…I t is therefore probable th a t an experimental investigation of the scattered intensity a t neutron energies of 2 MV or higher would provide very valuable evidence about the nature of nuclear forces. At present the only evidence of this kind is given by the preliminary experiments of Kruger, Shoupp, Watson and Stallmann (1938) and the recent investigations of Barschall and Kanner (1940), all using D-D neutrons. The results obtained by the two groups of workers do not agree, as Barschall and Kanner find th a t the angular distribution (in relative co-ordinates) is nearly uniform over the angular range investigated (70-120°), but the other workers find a distribu tion far from uniform.…”

Section: Comparison With Experimentsmentioning

confidence: 99%

The scattering of neutrons by deuterons and the nature of nuclear forces

Buckingham

Massey

1941

Proc. R. Soc. Lond. A

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The theory of the scattering of neutrons by deuterons has been worked out for neutrons with energy in the range 9-11*5 MV. It is assumed that the interaction energy of all fundamental particles is the same, and calculations have been carried out assuming three types of such interaction-an ordinary unsaturated force, an exchange force of Majorana-Heisenberg type, and a 'mixed* exchange force involved all exchange operators. The spacedependent part of the interaction is taken to be of the form Ae~2r,a, with the constants A and a as determined by Present and Rarita from a study of the binding energies and collision properties of the light nuclei. To obtain differ ential equations for the functions describing the relative motion of neutron and deuteron Wheeler's method of resonating group structure was employed. The resulting integro-differential equations, which include exchange of particles as well as exchange forces, were solved numerically. An exact solution of the deuteron internal wave equation for the exponential inter action was used throughout.Results for the total elastic cross-section, calculated with exchange forces, agree well with the observed values, but ordinary forces give, for 2-2 MV neutrons, a cross-section 1*5 times too large. The calculated angular dis tribution, in relative co-ordinates, is very much more uniform for exchange forces than for ordinary forces. For 2*2 MV neutrons this difference is so marked as to be easily detectable by experiment, and it is deduced that the measurements by Barschall and Kanner of the angular distribution for such neutrons are compatible only with the assumption of exchange forces. It is pointed out that the result that ordinary forces lead to a much less uniform angular distribution is likely to be a general one, independent of the detailed accuracy of the theory.The experimental investigation of neutron and proton collisions offers at first sight the simplest and most direct method of examining the nature of nuclear forces. The angular distribution of protons projected by impact of neutrons certainly depends very markedly on the nature of the forces acting, provided the energy of the neutron is sufficiently large for those colliding particles with one quantized unit of relative angular momentum to pass sufficiently close to affect each other appreciably. Unfortunately, this energy is somewhat larger than that of the only convenient source of

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Scattering of D—D Neutrons by Deuterium

Darby

Swan

1948

Nature

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The Scattering of Neutrons by Deuterons

Cited by 8 publications

References 5 publications

ELASTIC SCATTERING OF 20.6-MEV PROTONS BY DEUTERONS. Technical Report No. 22

ELASTIC SCATTERING OF 20.6-MEV PROTONS BY DEUTERONS. Technical Report No. 22

The scattering of neutrons by deuterons and the nature of nuclear forces

Scattering of D—D Neutrons by Deuterium

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