1 | For inelastic scattering, the currently supported final states are (nA$\rightarrow$) |
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2 | n$\gamma$s (discrete and continuum), np, nd, nt, n$^3$He, n$\alpha$, nd2$\alpha$, |
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3 | nt2$\alpha$, n2p, n2$\alpha$, np$\alpha$, n3$\alpha$, 2n, 2np, |
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4 | 2nd, 2n$\alpha$, 2n2$\alpha$, nX, 3n, 3np, 3n$\alpha$, 4n, p, |
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5 | pd, p$\alpha$, 2p d, d$\alpha$, d2$\alpha$, dt, t, t2$\alpha$, |
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6 | $^3$He, $\alpha$, 2$\alpha$, and 3$\alpha$. |
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7 | |
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8 | The photon distributions are again described as in the case of |
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9 | radiative capture. |
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10 | |
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11 | The |
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12 | possibility to describe the angular and energy distributions of the final |
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13 | state particles as in the case of fission is maintained, except that normally |
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14 | only the arbitrary tabulation of secondary energies is applicable. |
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15 | |
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16 | In addition, we support the possibility to describe the energy angular |
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17 | correlations explicitly, in analogy with the ENDF/B-VI data formats. |
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18 | In this case, the production cross-section for |
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19 | reaction product n can be written as |
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20 | $$\sigma_n(E, E', \cos(\theta))~=~\sigma(E)Y_n(E)p(E, E', \cos(\theta)).$$ |
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21 | Here $Y_n(E)$ is the product multiplicity, $\sigma(E)$ is the inelastic |
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22 | cross-section, and $p(E, E', \cos(\theta))$ is the distribution probability. |
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23 | Azimuthal symmetry is assumed. |
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24 | |
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25 | The representations for the distribution probability supported are iso\-tro\-pic |
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26 | emission, discrete two-body kinematics, N-body phase-space distribution, |
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27 | continuum energy-angle distributions, and continuum angle-energy distributions |
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28 | in the laboratory system. |
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29 | |
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30 | The description of isotropic emission and discrete two-body kinematics is |
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31 | possible without further information. In the case of N-body phase-space |
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32 | distribution, tabulated values for the number of particles being treated by the |
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33 | law, and the total mass of these particles are used. |
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34 | For the continuum energy-angle distributions, several options for representing |
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35 | the angular dependence are available. Apart from the already introduced methods |
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36 | of expansion in terms of legendre polynomials, and tabulation (here in |
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37 | both the incoming neutron energy, and the secondary energy), the Kalbach-Mann |
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38 | systematic is available. |
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39 | In the case of the continuum angle-energy distributions |
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40 | in the laboratory system, only the tabulated form in incoming neutron energy, |
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41 | product energy, and product angle is implemented. |
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42 | |
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43 | First comparisons for product yields, energy and angular distributions have |
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44 | been performed for a set of incoming neutron energies, but full test coverage |
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45 | is still to be achieved. |
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46 | In all cases currently investigated, the agreement between evaluated data and |
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47 | Monte Carlo is very good. |
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