. 2011 Jul 20;18(Pt 5):802–810. doi: 10.1107/S090904951102485X

Table 1. Sapphire backscattering reflections that match the nuclear transition energy in ¹²¹Sb and ¹²⁵Te.

All reflections with spectral efficiency above 50% are shown. For each reflection the expected crystal temperature T, energy bandwidth ΔE, spectral efficiency R, extinction length d _ext and angle ϕ between the diffraction vector of the chosen reflection and (0 0 0 1) are shown. The calculations were performed using the dynamical theory of X-ray diffraction with the sapphire crystal data (Shvyd’ko, 2004 ▶) in the thick crystal approximation.

Reflection (hkil)	T (K)	ΔE (meV)	R (%)	d_ext (mm)	ϕ (°)
¹²¹Sb, E = 37.1292 keV
(8 13 52)	258	0.14	73	1.48	48.1
(7 20 14)	146	0.33	87	0.63	79.6
(15 13 14)	146	0.42	90	0.50	79.6
(21 4 26)	237	0.22	81	0.99	70.5
(8 16 40)	237	0.25	84	0.85	59.1

¹²⁵Te, E = 35.4920 keV
(15 1 56)	263	0.08	51	2.70	41.1
(20 6 2)	211	0.24	80	0.90	88.5
(5 6 68)	219	0.36	86	0.60	23.9
(9 1 68)	219	0.44	89	0.48	23.9

Table 1. Sapphire backscattering reflections that match the nuclear transition energy in 121Sb and 125Te.

Table 1. Sapphire backscattering reflections that match the nuclear transition energy in ¹²¹Sb and ¹²⁵Te.