leapr
 20
 *BEO, ENDF MODEL (EXTENDED)*/
 8 1/
 27 127 0 0 2E-38/
 8.93478 6.15 1 3/
 1 0 15.858 3.7481 1/
 90 117 1/
 .01008 .015 .0252 .033 .0504 .0756 .1008 .15
 .252 .33 .504 .756 1.008 1.260 1.512 1.764 2.016 2.268 2.520 2.772 3.024
 3.282 3.544 3.813 4.087 4.366 4.652 4.943 5.241 5.545 5.855 6.172 6.495
 6.825 7.162 7.507 7.858 8.217 8.583 8.957 9.339 9.729 10.13 10.53 10.95
 11.37 11.81 12.25 12.69 13.16 13.63 14.11 14.60 15.10 15.61 16.13 16.66
 17.21 17.76 18.3 19. 20. 21. 22. 23. 24. 25. 26. 27.
 28. 30. 32. 34. 36. 38. 40. 42. 44. 46. 48. 50. 52.5 55. 57.5
 60. 62.5 65. 70. 75. 80. /
 0. .1513 .3025 .4537 .6049 .7561 .9073 1.059 1.210 1.361 1.512
1.5875 1.663 1.7390 1.815 1.8905 1.966 2.0415 2.117 2.1925 2.268
2.3435 2.419 2.4950 2.571 2.6465 2.722 2.7975 2.873 2.9485 3.024
3.1000 3.176 3.2515 3.327 3.4025 3.478 3.5850 3.629 3.7045 3.780
3.8560 3.932 4.0075 4.083 4.1620 4.241 4.3245 4.408 4.4955 4.583
4.6745 4.766 4.8620 4.958 5.0585 5.159 5.371 5.592
5.825 6.069 6.325 6.593 6.875 7.170 7.480 7.805 8.146 8.504 8.879 9.273
9.686 10.12 10.57 11.05 11.55 12.07 12.62 13.20 13.81 14.44 15.11 15.81
16.54 17.31 18.12 18.96 19.85 20.78 21.76 22.78 23.86 24.99 26.17 27.41
28.71 30.08 31.51 33.01 34.59 36.24 37.98 39.80
42. 44. 46. 48. 50. 52. 54. 56. 58. 60. 65. 70. 75. 80./
296/ BE IN BEO
.0016518 84/
0.0 .3 .7 .9 1. 1.2 1.6 2.0 2.2 3.0 3.5 4.5 5.5 6.8 8.0 9.2 10.9 12.9
15.5 18.6 22.0 26.0 30.5 35.0 39.0 40.0 34.0 28.0 26.0 24.4 23.0
21.3 19.8 17.0 14.1 12.0 10.0 9.0 9.0 8.5 7.5 6.0 4.6 3.1 1.6
0.5 0. 0.0 4.0 15.0 38.0 52.0 70.0 105.0 165.0 230.0 200.0 170.0
145.0 136.0 134.0 112.0 96.0 89.0 84.0 75.0 87.0 81.0 66.0 59.0
68.0 105.0 95.0 97.0 135.0 163.0 130.0 111.0 92.0 67.0 45.0 19.0
7.0 0.0/
0. 0. 1./
0/
-400/
-500/
-600/
-700/
-800/
-1000/
-1200/
296/ O IN BEO
.0016518 84/
0.0 0.4 0.8 1.0 1.4 2.0 2.5 3.5 4.8 6.2 8.9 11.0 14.0 17.2 21.5 26.5
34.0 40.0 46.0 58.0 60.0 93.0 110.0 129.0 141.0 142.0 125.0 101.0
93.0 92.0 91.0 95.0 95.0 98.0 108.0 93.0 78.0 98.0 112.0 115.0 145.0
160.0 190.0 190.0 120.0 43.0 0.0 0.0 1.0 9.0 19.0 26.0 35.0 48.0 66.0
92.0 82.0 56.0 44.0 35.0 29.0 21.0 15.0 11.5 9.0 8.0 7.0 6.0 5.2
4.5 5.0 5.9 6.0 5.0 4.0 2.5 1.8 1.0 0.50 0.50 0.20 0.0 0.0 0.0/
0. 0. 1./
0/
-400/
-500/
-600/
-700/
-800/
-1000/
-1200/
* BEO        LANL      EVAL-APR93 MACFARLANE*/
* REF. 4               DIST-            */
*----ENDF/B-VI         MATERIAL 27*/
*-----THERMAL NEUTRON SCATTERING DATA*/
*------ENDF-6 FORMAT*/
* */
* TEMPERATURES = 296 400 500 600 700 800 1000 1200 DEG K.*/
* */
* HISTORY*/
* -------*/
* THIS EVALUATION WAS GENERATED AT THE LOS ALAMOS NATIONAL */
* LABORATORY (APR 1993) USING THE LEAPR CODE. THE PHYSICAL */
* MODEL IS VERY SIMILAR TO THE ONE USED AT GENERAL ATOMICS */
* IN 1968 TO PRODUCE THE ORIGINAL ENDF/B-III EVALUATION */
* (SEE REF. 1.). TIGHTER GRIDS AND EXTENDED RANGES FOR ALPHA */
* AND BETA WERE USED. A SLIGHTLY MORE DETAILED CALCULATION */
* OF THE COHERENT INELASTIC SCATTERING WAS GENERATED. OF */
* COURSE, THE VARIOUS CONSTANTS WERE UPDATED TO AGREE WITH */
* THE ENDF/B-VI EVALUATIONS OF BE AND OXYGEN. */
* */
* THEORY*/
* ------*/
* BERYLLIUM OXIDE CONSISTS OF TWO INTERPENETRATING HEXAGONAL*/
* CLOSE-PACKED STRUCTURES WITH FOUR ATOMS PER UNIT CELL. THE*/
* LATTICE DYNAMICS (REF.2) IS DESCRIBED USING A SHELL MODEL*/
* WHOSE PARAMETERS HAVE BEEN ADJUSTED TO FIT THE ELASTIC*/
* CONSTANTS, THE MEASURED RAMAN FREQUENCIES, AND PRELIMINARY*/
* DISPERSION RELATIONS MEASURED BY NEUTRON SCATTERING*/
* (REF.3). ONLY THE NEGATIVE IONS ARE ASSUMED TO BE*/
* POLARIZABLE, AND SHORT-RANGE REPULSIVE FORCES ARE USED FOR*/
* THE FIRST AND SECOND NEIGHBORS. THE FREQUENCY SPECTRA*/
* WEIGHTED BY THE SQUARES OF THE AMPLITUDE VECTORS WERE*/
* COMPUTED SEPARATELY FOR BERYLLIUM AND OXYGEN AND USED TO*/
* CALCULATE SEPARATE SCATTERING LAWS WITH GASKET. THE*/
* SCATTERING LAWS WERE THEN COMBINED AND ADJUSTED TO BE*/
* USED WITH THE BERYLLIUM FREE-ATOM CROSS SECTION. THE*/
* OXYGEN FREE-ATOM CROSS SECTION HAS BEEN PROVIDED FOR USE*/
* WITH THE SHORT-COLLISION-TIME APPROXIMATION (SCT). THUS,*/
* THE THERMAL CROSS SECTION COMPUTED FROM EITHER S(ALPHA,BETA)*/
* OR BY THE SCT APPROXIMATION GIVES AN ASYMPTOTIC LIMIT OF*/
* APPROXIMATELY 6.15+3.75 BARNS. THE ELASTIC PART OF THE*/
* SCATTERING WAS CALCULATED USING THE AVERAGE OF THE DEBYE-WALLER*/
* FACTORS FOR BERYLLIUM AND OXYGEN.*/
* */
* REFERENCES*/
* ----------*/
* 1. J.U.KOPPEL AND D.H.HOUSTON, REFERENCE MANUAL FOR ENDF THERMAL*/
*    NEUTRON SCATTERING DATA, GENERAL ATOMIC REPORT GA-8774*/
*    REVISED AND REISSUED AS ENDF-269 BY THE NATIONAL NUCLEAR*/
*    DATA CENTER, JULY 1978.*/
* 2. G.BORGONOVI, LATTICE DYNAMICS AND NEUTRON SCATTERING OF BEO,*/
*    GENERAL ATOMIC REPORT GA-8758 (1968).*/
* 3. R.M.BRUGGER, K.A.STRONG, AND J.M.CARPENTER, J.PHYS.CHEM.*/
*    SOLIDS 28, 249 (1967).*/
* 4. R.E.MACFARLANE, NEW THERMAL NEUTRON SCATTERING FILES FOR */
*    ENDF/B-VI RELEASE 2, LOS ALAMOS NATIONAL LABORATORY REPORT */
*    LA-12639-MS (TO BE PUBLISHED). */
* */
/
stop