Calculations of neutron reflectivity in the eV energy range from mirrors made of heavy nuclei with neutron-nucleus resonances

Calculations of neutron reflectivity in the eV energy range from mirrors made of heavy nuclei with neutron-nucleus resonances
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计算由具有中子-核共振的重核制成的镜子在 eV 能量范围内的中子反射率

DOI:
10.1103/physreva.100.023612
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发表时间:
2019
期刊:
影响因子:
2.9
通讯作者:
Haddock, C.
Haddock, C.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Snow, W. M.;Dickerson, K. A.;Devaney, J. S.;Haddock, C.

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相似文献

我们评价了在eV能量范围内具有强中子核共振的重核组成的中子反射镜的反射率。对于这种情况,我们考虑了对通常中子光学公式的可能修正,并发现色散和多重散射效应可以忽略不计,但必须考虑多普勒展宽。与多普勒校正相比,表面粗糙度和声子散射的影响很小,并且与meV中子的镜像反射相同或更小。我们表明,这种反射镜对某些核的反射率原则上可以足够高,接近与复合中子核共振相对应的能量,对某些科学应用在地下材料成分的无损评估中有兴趣。
We evaluate the reflectivity of neutron mirrors composed of certain heavy nuclei which possess strong neutron-nucleus resonances in the eV energy range. We consider possible corrections to the usual formulas of neutron optics for this case and find that dispersion and multiple scattering effects are negligible but one must take Doppler broadening into account. Effects from surface roughness and phonon scattering are small compared to the Doppler corrections and are either the same as or smaller than those for mirror reflection with meV neutrons. We show that the reflectivity of such a mirror for some nuclei can in principle be high enough near energies corresponding to compound neutron-nucleus resonances to be of interest for certain scientific applications in nondestructive evaluation of subsurface material composition.
中子折射率:费米-惠更斯理论。
DOI: 10.1103/physrevb.32.6347
发表时间: 1985
期刊: Physical review. B, Condensed matter
影响因子: --
作者:
Warner;Gubernatis
通讯作者: Gubernatis
DOI: 10.1103/physrev.89.490
发表时间: 1953
期刊: Physical Review
影响因子: --
作者:
H. Ekstein
通讯作者: H. Ekstein
DOI: 10.1002/pssb.2220690207
发表时间: 1975
影响因子: 1.6
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观察核共振附近穿过物质的中子德布罗意波的运动引起的相移。
DOI: 10.1103/physreva.39.931
发表时间: 1989
期刊: Physical review. A, General physics
影响因子: --
作者:
Arif;Kaiser;Clothier;Werner;Hamilton;Cimmino;Klein
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DOI: 10.1007/bf01246267
发表时间: 1967
期刊: Soviet Atomic Energy
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作者:
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