R-matrix

<p>The term R-matrix has several meanings, depending on the field of study. Its original use has been to mathematically describe <a href="/facts/Nuclear_reaction/202yClUr">nuclear reactions</a>. In particular the general problem of nuclear reactions is to relate the values of the <a href="/facts/Scattering/nMou7lEH">scattering</a> or collision matrix elements (which in principle can be obtained from measurements) to the (slow) dynamics of <a href="/facts/Nuclear_structure/m13SoyNz">nuclear structure</a>. The R-matrix formalism describes the effects of the interaction of the nucleus with the outside world. Its interior is not specified, i.e. it is considered a "black box". The original formulations of the theory came from nuclear scientists <a href="/facts/Eugene_Wigner/HvWgw4KX">Wigner</a>, <a href="/facts/Leonard_Eisenbud/XXyncq43">Eisenbud</a>, <a href="/facts/Gregory_Breit/FQWwQEgv">Breit</a>, <a href="/facts/John_M._Blatt/21beMEgf">Blatt</a>, <a href="/facts/Victor_Weisskopf/jocTeNnB">Weisskopf</a>, and others. Related theories are U-matrix, <a href="/facts/S-matrix/NffJvlpp">S-matrix</a>, by <a href="/facts/M-matrix/qsoroftJ">M-matrix</a>, or <a href="/facts/T-matrix_method/v7vBsXU0">T-matrix</a>.
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R-matrix open-in-new

R-matrix