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The new spallation neutron facility n_TOF (neutron time-of-flight) at CERN opens wide possibilities in measurements of neutron induced reaction cross sections. The facility with its excellent energy resolution of neutrons, low repetition rate and most important – with a very high instantaneous luminosity, makes up an extra challenge for experimenters faced by doing measurements at a high peak intensity spallation source. Our proposition is directed to the use of a compensated ionization chamber for the (n, alpha) reaction cross section measurements we plan to carry out in a wide range of neutron energy. First experience gained with using such a kind of detector at ORELA (the Oak Ridge Electron Linear Accelerator) neutron source (ORNL) was very optimistic.
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Tom
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51--57
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Bibliogr. 20 poz., rys.
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autor
autor
autor
autor
autor
autor
- Chair of Nuclear Physics and Radiation Safety, The University of Łódź, 149/153 Pomorska Str., 90-236 Łódź, Poland, Tel.: +48 42 6355637, Fax: +48 42 6783958, jozefan@uni.lodz.pl
Bibliografia
- 1. Andrzejewski J, Vertebny VP, Vo Kim Tkhan, Vtyurin VA, Kiriluk AL, Popov YuP (1988) Study of (n, alfa) partial cross sections on 143Nd, 147Sm,149Sm by filtered neutron beams. Yadernaya Fizika (J Nucl Phys) 48:20−25
- 2. Andrzejewski J, Vo Kim Tkhan, Vtyurin VA, Korejwo A, Popov YuP, Stępiński M (1980) Investigation of averaged cross sections for (n,α) reactions on 123Te, 143Nd,147Sm and 149Sm. Sov J Nucl Phys 32:774−779
- 3. Arnould M, Takahashi K (1999) Nuclear astrophysics. Rep Prog Phys 62:395−464
- 4. Budtz-Jorgensen C, Knitter H-H (1984) A precise method for charged particle counting employing energy and angle information from gridded ion chambers. Nucl Instrum Methods 223:295−302
- 5. Cennini P, Abbondanno U, Alvarez H et al. (2002) n_TOF facility, installation, performances. CERN n_TOF facility:performance report. CERN/INTC-O-011, INTC-2002-037. CERN, Switzerland
- 6. Colas P, Delbart A, Derre J et al. (2002) Electron drift velocity measurements at high electric fields. Nucl Instrum Methods Phys Res A 478:215−219
- 7. Ferrari C, Rubbia C, Vlachoudis V (2002) A comprehensive study of the n_TOF background at CERN. CERN SL-2002-011 (ECT). CERN, Switzerland
- 8. Gledenov YuM, Koehler PE, Andrzejewski J, Guber KH, Rauscher T (2000) 147Sm(n,α) cross section measurements from 3 eV to 500 keV: implications for explosive nucleosynthesis reaction rates. Phys Rev Rapid Comm C 62:042801−042805
- 9. Goeminne G, Wagemans C, Wagemans J, Serot O,Loiselet M, Gaelens M (2000) Investigation of the 37Ar(n, p)37Cl and 37Ar(n, α)34S reactions in the neutron energy range from 10 meV to 100 keV. Nucl Phys A 678:11−23
- 10. Koehler PE (2001) Comparison of white neutron sources for nuclear astrophysics experiments using very small samples. Nucl Instrum Methods Phys Res A 460:352−361
- 11. Koehler PE, Gledenov YuM, Andrzejewski J, Guber KH, Raman S, Rauscher T (2001) Improving explosive nucleosynthesis models via (n, α) measurements. Nucl Phys A 688:86−89
- 12. Koehler PE, Harvey JA, Hill NW (1995) Two detectors for (n, p) and (n, α) measurements at white neutron sources. Nucl Instrum Methods Phys Res A 361:270−276
- 13. Kvitek J, Hnatowicz V, Cervena J, Vacik J, Gledenov YuM (1981) Proton transitions in 22Na(n, p)22Ne reaction. Z Phys A 299:177−178
- 14. Kvitek J, Popov YuP (1970) Investigation of the (n, alfa)reaction on Sm and Nd isotopes in the neutron energy region below 1 keV. Nucl Phys A 154:177−190
- 15. Peisert A, Sauli F (1984) Drift and diffusion of electrons in gases: a compilation, 84-08. CERN, Geneva
- 16. Popov YuP, Przytuła M, Rumi RF et al. (1972) Investigation f alfa-decay of 148Sm resonance states. Nucl Phys A 188:212−224
- 17. Va’vra J, Coyle P, Kadyk J, Wise J (1993) Measurement of electron drift parameters for helium and CF4-based gases. Nucl Instrum Methods Phys Res A 324:113−126
- 18. Wagemans J, Wagemans C, Goeminne G, Geltenbort P (2000) Experimental determination of the 14N(n, p)14C reaction cross section for thermal neutrons. Phys Rev C 61:064601−064606
- 19. Wilkinson DH (1950) Ionization chambers and counters. Cambridge University Press, Cambridge
- 20. Yamashita T, Kobayashi H, Konaka A et al. (1989)Measurements of the electron drift velocity and positive − ion mobility for gases containing CF4. Nucl Instrum Methods Phys Res A 283:709−715
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Bibliografia
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bwmeta1.element.baztech-article-BUJ5-0013-0002