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Title Production of ultra-cold neutrons in solid α-oxygen
Author E. Gutsmiedl, F. Bohle, A. Frei, A. Maier, S. Paul, A. Orecchini, H. Schober
Abstract Our recent neutron scattering measurements of phonons and magnons in solid α-oxygen have led us to a new understanding of the production mechanism of ultra-cold neutrons (UCN) in this super-thermal converter. The UCN production in solid α-oxygen is dominated by the excitation of phonons. The contribution of magnons to UCN production becomes only slightly important above E>10 meV and at E∼4 meV. Solid α-oxygen is in comparison to solid deuterium less efficient in the down-scattering of thermal or cold neutrons into the UCN energy regime. Nevertheless, the lower efficiency might be compensated by the larger mean free-path of UCN in oxygen with respect to deuterium.
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References
[1] Golub R., Richardson D. and Lamoreaux S. K., Ultra-Cold-Neutrons (Adam Hilger, Bristol, Philadelphia, New York) 1991.
[2] Ramsey-Musolf M. J., Nucl. Instrum. Methods Phys. Res. A, 611 (2009) 111.
[3] Baker C. A. et al., Phys. Rev. Lett., 97 (2006) 131801.
[4] Paul S., Nucl. Instrum. Methods Phys. Res. A, 611 (2009) 157.
[5] Schreckenbach K., J. Phys. G, 14 (1988) S391.
[6] Frei A. et al., Eur. Phys. J. A, 34 (2007) 119.
[7] Hill R. E. et al., Nucl. Instrum. Methods Phys. Res. A, 440 (2000) 674.
[8] Anghel A. et al., Nucl. Instrum. Methods Phys. Res. A, 611 (2009) 272.
[9] Serebrov A. et al., JETP Lett., 62 (1995) 785.
[10] Stephens P. W. and Majkrzak C. F., Phys. Rev. B, 33 (1986) 1.
[11] Liu C.-Y. and Young A. R., arXiv:nucl-th/0406004v1 (2004).
[12] Morris C. L. et al., Phys. Rev. Lett., 89 (2002) 272501.
[13] Atchison F. et al., EPL, 95 (2011) 12001.
[14] Salvat D. et al., 7th International UCN Workshop St. Petersburg Russia, http://cns.pnpi.spb.ru/ucn/ index.html (2009).
[15] Frei A. et al., arXiv:1006.2970v2 [nucl-ex] (2011).
[16] Bozhanova Ralitsa, Optical investigations of solid oxygen in the α-phase, Bachelor Thesis, Technische Universit¨at M¨unchen, http://www.e18.physik.tumuenchen.de/(2009).
[17] Frei A. et al., Phys. Rev. B, 80 (2009) 064301.
[18] Freiman Yu. A. and Jodl H. J., Phys. Rep., 401 (2004) 1.
[19] Jansen A. P. and van der Avoi rd A., J. Chem. Phys., 86 (1987) 3583.
[20] de Bernabe A. et al., Phys. Rev. B, 58 (1998) 14442.
[21] Squires G. L., Introduction to the Theory of Thermal Neutron Scattering (Cambridge University Press, Cambridge) 1978.
[22] Turchin V. F., Slow Neutrons (Israel Program for Scientific Translations, Jerusalem) 1965.
[23] Breuer N., Z. Phys., 271 (1974) 289.
[24] Kilburn D. et al., Phys. Rev. B, 78 (2008) 214304.
[25] The expression for beff is an approximation, which neglects interference effects (Melkonian E., Phys. Rev., 76 (1949) 1750; Fermi E. and Marshall L., Phys. Rev.
71 (1947) 666) and nuclear and magnetic form factors (Sears V. F., Can. J. Phys. 44 (1966) 1279; Kleiner W. H., Phys. Rev., 97 (1955) 411).
[26] http://www.ncnr.nist.gov/resources/n-lengths/.
[27] Altarev I. et al., Phys. Rev. Lett., 100 (2008) 014801.
[28] Frei A. et al., EPL, 92 (2010) 62001.
[29] Atchison F. et al., Nucl. Instrum. Methods Phys. Res. A, 611 (2009) 252.
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