Excitation of Isomeric States in the Reactions (γ, n) and (n, 2n) on the 81Br Nucleus
Tóm tắt
The cross sections for the formation of isomeric states in the reactions (γ, n) and (n, 2n) on the 81Br nucleus were measured by the induced activity method. The energy dependence of the isomeric ratio of the reaction yields (γ, n) in the energy range 14–35 MeV with a step of 1 MeV was obtained. The experimental results are compared with the data of other works and the TALYS-1.6 calculation.
Tài liệu tham khảo
Yu. P. Gangrskii, A. P. Tonchev, and N. P. Balabanov, “Excitation of isomeric states in photonuclear reactions,” Phys. Part. Nucl. 27, 428 (1996).
V. M. Mazur, “Nuclear isomeric states excitation in the (γ, n) reaction within the dipole giant resonance region,” Phys. Part. Nucl. 31, 188 (2000).
V. M. Mazur, V. S. Bokhinyuk, Z. M. Bigan, and I. V. Sokolyuk, “Photoexcitation of isomeric states in the (γ, n) reaction on 81Br and 121Sb nuclei in the 10–25 MeV region,” Ukr. Fiz. Zh. 37, 1632–1635 (1992).
M. G. Davydov, V. G. Magera, and A. V. Trukhov, “Isomer yield (cross section) ratios of photonuclear reactions,” At. Energy 62, 232–243 (1987).
S. R. Palvanov and O. Razhabov, “Isomer yield ratios of photonuclear reactions at E γmax 25 and 30 MeV,” At. Energy 87, 533–536 (1999).
http://www.inp.uz.
R. D. Babadzhanov, S. R. Palvanov, O. Razhabov, and G. L. Shelemet’ev, “A device for the intra-chamber bremsstrahlung irradiation of samples in a betatron,” Instrum. Exp. Tech. 40, 154–155 (1997).
R. B. Firestone, V. S. Shirley, and C. M. Baglin, Table of Isotopes, CD-ROM, 8th ed. (1996).
R. Vänska and R. Rieppo, “The experimental isomeric cross-sections ratio in the nuclear activation technique,” Nucl. Instrum. Methods Phys. Res. 179, 525–532 (1981).
A. V. Varlamov, V. V. Varlamov, D. S. Rudenko, and M. E. Stepanov, “Atlas of giant dipole resonances,” INDS (NDS)-394 (IAEA, Vienna, 1999).
A. S. Penfold and J. E. Leiss, “Analysis of photonuclear cross-sections,” Phys. Rev. 114, 1332–1337 (1959).
A. J. Koning, S. Hilaire, and M. C. Duijvestijn, “TALYS-1.0,” in Proceedings of the International Conference on Nuclear Data for Science and Technology ND2007, Nice, France, April 22–27, 2007, Ed. by O. Bersillon, F. Gunsing, E. Bauge, R. Jacqmin, and S. Leray (EDP Sciences, 2008), pp. 211–214.
www.talys.eu.
L. I. Schiff, “Energy-angle distribution of thin target Bremsstrahlung,” Phys. Rev. 83, 252–253 (1951).
H. Vonach, “The 27Al(n.α) 24Na cross section,” in Nuclear Data Standards for Nuclear Measurements 1991 NEANDC/INDC Nuclear Standards File (Nuclear Energy Agency Organization for Economic co-operation and Development, 1992), pp. 75–77. www.oecd-nea.org/ neandc1991-311-u.
Z. Liangyong, L. Changlin, and F. Kaihong, “Some cross-sections of Bromine isotopes induced by 14 MeV neutrons,” Ann. Nucl. Energy 36, 874 (2009).
Chang-Lin Lan, “Activation cross-section measurements for producing short-lived nuclei with 14 MeV neutrons—Ge, Pd, Yb,” J. RPCC Newslett. 77, 854 (2008).