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Activation Cross Sections for (n, p), [(n, np)+(n, pn)+(n, d)], and (n, α) Reactions in the Region of Z=40 to 58 at 14.4 MeV

Wen-deh Lu*, N. RanaKumar, and R. W. Fink

  • School of Chemistry, Georgia Institute of Technology, Atlanta, Georgia

  • *Work supported by Chung Shan Institute of Science and Technology, Taiwan, Republic of China.

Phys. Rev. C 1, 358 – Published 1 January, 1970

DOI: https://doi.org/10.1103/PhysRevC.1.358

Abstract

The following activation cross sections (in mb) for the (n, p), [(n, np)+(n, pn)+(n, d)] and (n, α) reactions in the region of Z=4058 have been determined at 14.4±0.3 MeV by using the mixed powder method with Ge(Li) γ-ray detection: Zr90(n, p)Y90m (3.1 h), 12.9±1.0; Zr91(n, p)Y91m (50.3 min), 18.6±1.9; Zr92(n, p)Y92 (3.53 h), 18.5±2.7; Mo92(n, p)Mb92m (10.1 day), 62.5±4.0; Mo96(n, p)Nb96 (23.35 h), 21.3±1.5; Mo97(n, p)Nb97m (1 min), 7.4±0.8; Mo97(n, p)Nb97g (72 min), 8.5±1.0; Mo98(n, p)Nb98g (51 min), 4.1±0.5; Ru96(n, p)Tc96 (4.35 day), 146±7; Rh103(n, p)Ru103 (39.5 day), 16.9±1.5; Pd105(n, p)Rh105 (35.9 h), 37.6±2.0; Pd106(n, p)Rh106m (130 min), 6.0±0.4; Pd106(n, p)Ru106g (30 sec), 18±4; Pd108(n, p)Rh108 (16.8 sec), 8.3±1.5; Cd112(n, p)Ag112 (3.14 h), 15.0±1.3; Sn116(n, p)In116m (54 min), 7.9±0.8; Sn117(n, p)In117m (1.93h), 5.7±1.5; Sn117(n, p)In117g (45 min), 9.8±1.6; Ba138(n, p)Cs138 (32.2 min), 3.8±0.6; Ce140(n, p)La140 (40.22 h), 6.3±0.5; Zr94(n, α)Sr91 (9.67 h), 5.0±1.0; Nb93(n, α)Y90m (3.1 h), 5.3±0.5; Mo92(n, α)Zr89m (4.18 min), 9.4±0.9; Mo92(n, α)Zr89g (78.4 h), 18.7±1.5; Mo98(n, α)Zr95 (65.5 day), 8.1±1.0; Pd106(n, α)Ru103 (39.5 day), 5.6±0.7; Pd108(n, α)Ru105 (4.44 h), 2.7±0.3; Cs133(n, α)I130 (12.3 h), 1.96±0.15; Ba138(n, α)Xe135m (15.6 min), 0.55±0.05; Ba138(n, α)Xe135g (9.14 h), 2.0±0.2; Ce142(n, α)Ba139 (82.9 min), 6.0±1.0; Ru96[(n, np)+(n, pn)+(n,d)]Tc95m (61.0 day), 52±10; and Ru96[(n, np)+(n, pn)+(n, d)]Tc95g (20 h), 483±50. The total (n, p) cross sections are compared with Levkovskii's predictions and show good agreement. The relative (n, p) cross sections of Mo and Pd also are compared with Gardner's predictions.

References (11)

  1. V. N. Levkovskii, Zh. Eksperim. i Teor. Fiz. 45, 305 (1964) [English transl.: Soviet Phys.—JETP 18, 213 (1964)]
  2. D. G. Gardner and S. Rosenblum, Nucl. Phys. A96, 121 (1967)
  3. S. Pearlstein, Nucl. Data A3, 327 (1967) Brookhaven National Laboratory Report No. BNL-897 (T-365), 1964 (unpublished)
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  7. W. Lu, N. RanaKumar, and R. W. Fink, preceding paper, Phys. Rev. C 1, 350 (1970)
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  9. P. Cuzzerea, S. Notarrigo, and E. Perillo, (a) Institute of Nuclear Physics Frascati, Italy, Report No. INFN/BE-67/10 (unpublished) (b) Institute of Nuclear Physics, Frascati, Italy, Report No. INFN/Be-67/11 (unpublished)
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