ENTRY M0273 20250329 M136M0273 0 1 SUBENT M0273001 20250329 M136M0273 1 1 BIB 10 46 M0273 1 2 TITLE The solution of x-ray activation curves for M0273 1 3 photonuclear cross sections. M0273 1 4 AUTHOR (L.Katz,A.G.W.Cameron) M0273 1 5 INSTITUTE (1CANSAS) M0273 1 6 REFERENCE (J,CJP,29,518,1951) M0273 1 7 (J,PR,80,1062,1950) M0273 1 8 63Cu,65Cu,121Sb,123Sb,181Ta(g,n) initial results. M0273 1 9 (J,PR,82,271,1951) M0273 1 10 54Fe,58Ni,64Zn(g,n) initial results. M0273 1 11 (J,PR,81,815,1951) M0273 1 12 31P(g,n) and 32S(g,d+np) initial results. M0273 1 13 METHOD (ACTIV) Activation curve measurement. M0273 1 14 INC-SOURCE (BRST) M0273 1 15 ANALYSIS (PHDIF) M0273 1 16 ERR-ANALYS No information given M0273 1 17 COMMENT A method is presented for the computation of M0273 1 18 photonuclear cross sections from their x-ray M0273 1 19 activation or yield curves. It is based on the photon M0273 1 20 differences between successive Schiff representations M0273 1 21 of bremsstrahlung spectra and assumes that the M0273 1 22 activation curves have smooth first and second M0273 1 23 derivatives. M0273 1 24 Artificially prepared activation curves have been M0273 1 25 satisfactorily solved by this method, and the M0273 1 26 published photonuclear activation curves determined M0273 1 27 in this laboratory have been reanalyzed. The M0273 1 28 resulting cross section curves are in essential M0273 1 29 agreement with those originally determined; however, M0273 1 30 the new values are believed to be more reliable. M0273 1 31 New constants for two proposed relationships between M0273 1 32 (g,n) 'resonance' peak energies and atomic mass M0273 1 33 number have been determined. M0273 1 34 Appended to the paper are tables of the Schiff M0273 1 35 bremsstrahlung spectra for maximum photon energies M0273 1 36 between 8 and 28 MeV and also of special functions M0273 1 37 for cross section computations between the same M0273 1 38 energies. M0273 1 39 HISTORY (19880818C) M0273 1 40 (19910202A) Corrected by V.Varlamov, V.Mclane M0273 1 41 (20071005A) DATES and REACTIONS corrected, lowercase, M0273 1 42 V.Varlamov M0273 1 43 (20240810A) Corrected by V.Varlamov: REFERENCE, M0273 1 44 FACILITY, METHOD, DETECTOR, ANALYSIS, DATA, STATUS, M0273 1 45 lowercase. M0273 1 46 (20250329A) Corrected by V.Varlamov: REACTION and M0273 1 47 COMMENT in SUBENT 011. M0273 1 48 ENDBIB 46 0 M0273 1 49 NOCOMMON 0 0 M0273 1 50 ENDSUBENT 49 0 M0273 199999 SUBENT M0273002 20240810 M133M0273 2 1 BIB 5 9 M0273 2 2 REACTION (6-C-12(G,N)6-C-11,,SIG,,BRS,DEROT) M0273 2 3 ANALYSIS Reaction cross-section was unfolded from the M0273 2 4 yield measured by Haslam et al in 1951. M0273 2 5 REL-REF (R,,R.N.H.Haslam+,J,PR,82,270,1951) M0273 2 6 Experimental data for yield of reaction. M0273 2 7 STATUS (TABLE,,L.Katz+,J,CJP,29,518,1951) M0273 2 8 Data presented in Table II. M0273 2 9 HISTORY (20240810A) Corrected by V.Varlamov: REACTION, M0273 2 10 ANALYSIS, REL-REF, STATUS. M0273 2 11 ENDBIB 9 0 M0273 2 12 NOCOMMON 0 0 M0273 2 13 DATA 2 9 M0273 2 14 EN DATA M0273 2 15 MEV MB M0273 2 16 19. 0.05 M0273 2 17 20. 0.50 M0273 2 18 21. 2.30 M0273 2 19 22. 9.4 M0273 2 20 23. 13.1 M0273 2 21 24. 8.8 M0273 2 22 25. 5.2 M0273 2 23 26. 3.3 M0273 2 24 27. 1.9 M0273 2 25 ENDDATA 11 0 M0273 2 26 ENDSUBENT 25 0 M0273 299999 SUBENT M0273003 20240810 M133M0273 3 1 BIB 4 5 M0273 3 2 REACTION (15-P-31(G,N)15-P-30,,SIG,,BRS) M0273 3 3 FACILITY (BETAT,1CANSAS) 22-MeV betatron. M0273 3 4 STATUS (TABLE,,L.Katz+,J,CJP,29,518,1951) M0273 3 5 Data presented in Table II. M0273 3 6 HISTORY (20240810U) Corrected by V.Varlamov: FACILITY, STATUS. M0273 3 7 ENDBIB 5 0 M0273 3 8 NOCOMMON 0 0 M0273 3 9 DATA 2 13 M0273 3 10 EN DATA M0273 3 11 MEV MB M0273 3 12 13. 1.4 M0273 3 13 14. 3.2 M0273 3 14 15. 5.1 M0273 3 15 16. 7.6 M0273 3 16 17. 10.7 M0273 3 17 18. 14.4 M0273 3 18 19. 16.6 M0273 3 19 20. 16.4 M0273 3 20 21. 13.8 M0273 3 21 22. 10.6 M0273 3 22 23. 8.0 M0273 3 23 24. 6.0 M0273 3 24 25. 4.3 M0273 3 25 ENDDATA 15 0 M0273 3 26 ENDSUBENT 25 0 M0273 399999 SUBENT M0273004 20240810 M133M0273 4 1 BIB 4 5 M0273 4 2 REACTION (26-FE-54(G,N)26-FE-53,,SIG,,BRS) M0273 4 3 FACILITY (BETAT,1CANSAS) 22-MeV betatron. M0273 4 4 STATUS (TABLE,,L.Katz+,J,CJP,29,518,1951) M0273 4 5 Data presented in Table II. M0273 4 6 HISTORY (20240810U) Corrected by V.Varlamov: FACILITY, STATUS. M0273 4 7 ENDBIB 5 0 M0273 4 8 NOCOMMON 0 0 M0273 4 9 DATA 2 11 M0273 4 10 EN DATA M0273 4 11 MEV MB M0273 4 12 14. 1.4 M0273 4 13 15. 11.1 M0273 4 14 16. 25. M0273 4 15 17. 42. M0273 4 16 18. 62. M0273 4 17 19. 67. M0273 4 18 20. 60. M0273 4 19 21. 49. M0273 4 20 22. 40. M0273 4 21 23. 32. M0273 4 22 24. 25. M0273 4 23 ENDDATA 13 0 M0273 4 24 ENDSUBENT 23 0 M0273 499999 SUBENT M0273005 20240810 M133M0273 5 1 BIB 4 5 M0273 5 2 REACTION (28-NI-58(G,N)28-NI-57,,SIG,,BRS) M0273 5 3 FACILITY (BETAT,1CANSAS) 22-MeV betatron. M0273 5 4 STATUS (TABLE,,L.Katz+,J,CJP,29,518,1951) M0273 5 5 Data presented in Table II. M0273 5 6 HISTORY (20240810U) Corrected by V.Varlamov: FACILITY, STATUS. M0273 5 7 ENDBIB 5 0 M0273 5 8 NOCOMMON 0 0 M0273 5 9 DATA 2 10 M0273 5 10 EN DATA M0273 5 11 MEV MB M0273 5 12 13. 11. M0273 5 13 14. 15. M0273 5 14 15. 23. M0273 5 15 16. 33. M0273 5 16 17. 46. M0273 5 17 18. 53. M0273 5 18 19. 54. M0273 5 19 20. 45. M0273 5 20 21. 28. M0273 5 21 22. 16. M0273 5 22 ENDDATA 12 0 M0273 5 23 ENDSUBENT 22 0 M0273 599999 SUBENT M0273006 20240810 M133M0273 6 1 BIB 4 5 M0273 6 2 REACTION (29-CU-63(G,N)29-CU-62,,SIG,,BRS) M0273 6 3 FACILITY (BETAT,1CANSAS) 22-MeV betatron. M0273 6 4 STATUS (TABLE,,L.Katz+,J,CJP,29,518,1951) M0273 6 5 Data presented in Table II. M0273 6 6 HISTORY (20240810U) Corrected by V.Varlamov: FACILITY, STATUS. M0273 6 7 ENDBIB 5 0 M0273 6 8 NOCOMMON 0 0 M0273 6 9 DATA 2 11 M0273 6 10 EN DATA M0273 6 11 MEV MB M0273 6 12 11. 2. M0273 6 13 12. 13. M0273 6 14 13. 23. M0273 6 15 14. 40. M0273 6 16 15. 64. M0273 6 17 16. 86. M0273 6 18 17. 99. M0273 6 19 18. 104. M0273 6 20 19. 97. M0273 6 21 20. 72. M0273 6 22 21. 39. M0273 6 23 ENDDATA 13 0 M0273 6 24 ENDSUBENT 23 0 M0273 699999 SUBENT M0273007 20240810 M133M0273 7 1 BIB 4 5 M0273 7 2 REACTION (29-CU-65(G,N)29-CU-64,,SIG,,BRS) M0273 7 3 FACILITY (BETAT,1CANSAS) 22-MeV betatron. M0273 7 4 STATUS (TABLE,,L.Katz+,J,CJP,29,518,1951) M0273 7 5 Data presented in Table II. M0273 7 6 HISTORY (20240810U) Corrected by V.Varlamov: FACILITY, STATUS. M0273 7 7 ENDBIB 5 0 M0273 7 8 NOCOMMON 0 0 M0273 7 9 DATA 2 12 M0273 7 10 EN DATA M0273 7 11 MEV MB M0273 7 12 11. 18. M0273 7 13 12. 32. M0273 7 14 13. 51. M0273 7 15 14. 73. M0273 7 16 15. 96. M0273 7 17 16. 119. M0273 7 18 17. 138. M0273 7 19 18. 150. M0273 7 20 19. 149. M0273 7 21 20. 130. M0273 7 22 21. 81. M0273 7 23 22. 34. M0273 7 24 ENDDATA 14 0 M0273 7 25 ENDSUBENT 24 0 M0273 799999 SUBENT M0273008 20240810 M133M0273 8 1 BIB 4 5 M0273 8 2 REACTION (30-ZN-64(G,N)30-ZN-63,,SIG,,BRS) M0273 8 3 FACILITY (BETAT,1CANSAS) 22-MeV betatron. M0273 8 4 STATUS (TABLE,,L.Katz+,J,CJP,29,518,1951) M0273 8 5 Data presented in Table III. M0273 8 6 HISTORY (20240810U) Corrected by V.Varlamov: FACILITY, STATUS. M0273 8 7 ENDBIB 5 0 M0273 8 8 NOCOMMON 0 0 M0273 8 9 DATA 2 13 M0273 8 10 EN DATA M0273 8 11 MEV MB M0273 8 12 11. 4. M0273 8 13 12. 18. M0273 8 14 13. 39. M0273 8 15 14. 63. M0273 8 16 15. 88. M0273 8 17 16. 108. M0273 8 18 17. 121. M0273 8 19 18. 123. M0273 8 20 19. 116. M0273 8 21 20. 100. M0273 8 22 21. 79. M0273 8 23 22. 56. M0273 8 24 23. 34. M0273 8 25 ENDDATA 15 0 M0273 8 26 ENDSUBENT 25 0 M0273 899999 SUBENT M0273009 20240810 M133M0273 9 1 BIB 4 5 M0273 9 2 REACTION (51-SB-121(G,N)51-SB-120,,SIG,,BRS) M0273 9 3 FACILITY (BETAT,1CANSAS) 22-MeV betatron. M0273 9 4 STATUS (TABLE,,L.Katz+,J,CJP,29,518,1951) M0273 9 5 Data presented in Table III. M0273 9 6 HISTORY (20240810U) Corrected by V.Varlamov: FACILITY, STATUS. M0273 9 7 ENDBIB 5 0 M0273 9 8 NOCOMMON 0 0 M0273 9 9 DATA 2 9 M0273 9 10 EN DATA M0273 9 11 MEV MB M0273 9 12 10. 57. M0273 9 13 11. 130. M0273 9 14 12. 264. M0273 9 15 13. 470. M0273 9 16 14. 658. M0273 9 17 15. 665. M0273 9 18 16. 591. M0273 9 19 17. 386. M0273 9 20 18. 189. M0273 9 21 ENDDATA 11 0 M0273 9 22 ENDSUBENT 21 0 M0273 999999 SUBENT M0273010 20240810 M133M0273 10 1 BIB 4 5 M0273 10 2 REACTION (51-SB-123(G,N)51-SB-122,,SIG,,BRS) M0273 10 3 FACILITY (BETAT,1CANSAS) 22-MeV betatron. M0273 10 4 STATUS (TABLE,,L.Katz+,J,CJP,29,518,1951) M0273 10 5 Data presented in Table III. M0273 10 6 HISTORY (20240810U) Corrected by V.Varlamov: FACILITY, STATUS. M0273 10 7 ENDBIB 5 0 M0273 10 8 NOCOMMON 0 0 M0273 10 9 DATA 2 9 M0273 10 10 EN DATA M0273 10 11 MEV MB M0273 10 12 10. 30. M0273 10 13 11. 69. M0273 10 14 12. 140. M0273 10 15 13. 249. M0273 10 16 14. 348. M0273 10 17 15. 362. M0273 10 18 16. 313. M0273 10 19 17. 204. M0273 10 20 18. 100. M0273 10 21 ENDDATA 11 0 M0273 10 22 ENDSUBENT 21 0 M0273 1099999 SUBENT M0273011 20250329 M136M0273 11 1 BIB 5 8 M0273 11 2 REACTION (73-TA-181(G,N)73-TA-180-G,,SIG,,BRS) M0273 11 3 FACILITY (BETAT,1CANSAS) 22-MeV betatron. M0273 11 4 COMMENT The metastable state of 180Ta has very long half-life M0273 11 5 (>7.1E+15 y). M0273 11 6 STATUS (TABLE,,L.Katz+,J,CJP,29,518,1951) M0273 11 7 Data presented in Table III. M0273 11 8 HISTORY (20240810U) Corrected by V.Varlamov: FACILITY, STATUS. M0273 11 9 (20250329A) REACTION: -G in SF4. M0273 11 10 ENDBIB 8 0 M0273 11 11 NOCOMMON 0 0 M0273 11 12 DATA 2 10 M0273 11 13 EN DATA M0273 11 14 MEV MB M0273 11 15 9. 6. M0273 11 16 10. 15. M0273 11 17 11. 30. M0273 11 18 12. 51. M0273 11 19 13. 73. M0273 11 20 14. 80. M0273 11 21 15. 72. M0273 11 22 16. 42. M0273 11 23 17. 23. M0273 11 24 18. 15. M0273 11 25 ENDDATA 12 0 M0273 11 26 ENDSUBENT 25 0 M0273 1199999 SUBENT M0273012 20240810 M133M0273 12 1 BIB 4 6 M0273 12 2 REACTION (16-S-32(G,X)15-P-30,,SIG,,BRS) M0273 12 3 FACILITY (BETAT,1CANSAS) 22-MeV betatron. M0273 12 4 STATUS (TABLE,,L.Katz+,J,CJP,29,518,1951) M0273 12 5 Data presented in Table III. M0273 12 6 HISTORY (20240810A) Corrected by V.Varlamov: REACTION, M0273 12 7 FACILITY, STATUS. M0273 12 8 ENDBIB 6 0 M0273 12 9 NOCOMMON 0 0 M0273 12 10 DATA 2 8 M0273 12 11 EN DATA M0273 12 12 MEV MB M0273 12 13 20. 0.0185 M0273 12 14 21. 0.048 M0273 12 15 22. 0.29 M0273 12 16 23. 1.62 M0273 12 17 24. 2.35 M0273 12 18 25. 3.63 M0273 12 19 26. 6.0 M0273 12 20 27. 2.0 M0273 12 21 ENDDATA 10 0 M0273 12 22 ENDSUBENT 21 0 M0273 1299999 SUBENT M0273013 20240810 M133M0273 13 1 BIB 5 9 M0273 13 2 REACTION (37-RB-87(G,A)35-BR-83,,SIG,,BRS,DEROT) M0273 13 3 ANALYSIS Reaction cross-section was unfolded from the M0273 13 4 yield measured by Haslam et al in 1951. M0273 13 5 REL-REF (R,,R.N.H.Haslam+,J,PR,81,479,1951) M0273 13 6 Experimental data for yield of reaction. M0273 13 7 STATUS (TABLE,,L.Katz+,J,CJP,29,518,1951) M0273 13 8 Data presented in Table III. M0273 13 9 HISTORY (20240810A) Corrected by V.Varlamov: REACTION, M0273 13 10 ANALYSIS, REL-REF, STATUS. M0273 13 11 ENDBIB 9 0 M0273 13 12 NOCOMMON 0 0 M0273 13 13 DATA 2 13 M0273 13 14 EN DATA M0273 13 15 MEV MB M0273 13 16 15. 0.002 M0273 13 17 16. 0.005 M0273 13 18 17. 0.015 M0273 13 19 18. 0.027 M0273 13 20 19. 0.040 M0273 13 21 20. 0.052 M0273 13 22 21. 0.062 M0273 13 23 22. 0.071 M0273 13 24 23. 0.075 M0273 13 25 24. 0.075 M0273 13 26 25. 0.068 M0273 13 27 26. 0.050 M0273 13 28 27. 0.030 M0273 13 29 ENDDATA 15 0 M0273 13 30 ENDSUBENT 29 0 M0273 1399999 ENDENTRY 13 0 M027399999999