Another hi towards south.
Still, your term "neutron-neutron interaction" lacks definition, because
you will neither see this by x-ray nor by neutron diffraction techniques,
if the sense I put into this term is correct.
Normally the energy states of a nucleus (more generally: an ensemble of
neutrons & protons) are investigated by very high energetic radiation -
gamma-photons. Their wavelength is too short, to recover any Bragg
diffraction peaks, just as you cannot do vibrational spectroscopy by using
x-ray photons.
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Perhaps you mean the magnetic interaction of a neutron's spin with the spinof the outer-shell electrons? If there are any unpaired electrons, thiswill result in supplementary bragg peaks, the so-called "magneticstructure"?
Well - the x-ray visibility of those peaks depends on the intensity of theincident photon beam. If you take synchrotron radiation for example you can"see" the magnetic structure of a solid, allthough for photons those peaksare usually of about 10e-4 of the Bragg reflections' intensity. Withlaboratory x-ray sources, you will usually not arrive to see magnetic peaks- they are allmost allways "hidden" by the noise.
Sincerely
Carsten
Carsten Schinzer ---------------------------------------
Institut de Chimie de la Matiere Condensee de Bordeaux 87, Avenue du Docteur A. Schweitzer F-33608 PESSAC fon +33 556 84 2650 (poste 7397) fax +33 556 84 2761 http://www.icmcb.u-bordeaux.fr/~schinzer--------------------------------------------------------