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实用新型
CN203606501U γ射线准直器及其探测系统 有权

γ射线准直器及其探测系统
摘要：
本实用新型公开了一种γ射线准直器及其探测系统，其中所述γ射线准直器包括圆柱形的、用于对γ射线进行屏蔽的屏蔽体及沿所述屏蔽体的轴向贯通开设的准直孔，所述准直器还包括固定在所述准直孔内的过滤器，所述准直孔的内壁上设有用于对γ射线进行吸收的第一内衬层，所述第一内衬层的内壁上还设有第二内衬层，且所述第一内衬层的一端与所述过滤器的端面相接触。通过在准直孔的内壁上设置第一内衬层及在第一内衬层的内壁贴合第二内衬层，从而在准直孔内形成了紧密贴合的第一内衬层和第二内衬层，第一内衬层和第二内衬层能将γ射线在准直孔内引起的散射γ射线进行屏蔽和吸收，减少了进入探测器内的无需测量的γ射线。
摘要（英）：

The utility model discloses a [gamma] ray collimator and a detection system thereof. The [gamma] ray collimator comprises a cylindrical shield used for shielding [gamma] rays, and a collimating aperture penetrating through the shield in the axial direction. The collimator further comprises a filter fixed in the collimating aperture. The inner wall of the collimating aperture is provided with a first liner layer used for absorbing the [gamma] rays. The inner wall of the first liner layer is provided with a second liner layer. One end of the first liner layer is in contact with the end surface of the filter. According to the utility model, the inner wall of the collimating aperture is provided with the first liner layer, and the second liner layer is attached to the inner wall of the first liner layer, so that the first liner layer and the second liner layer, which are tightly attached, are formed in the collimating aperture; the first liner layer and the second liner layer are capable of shielding and absorbing scattering [gamma] rays generated in the collimating aperture by the [gamma] rays; and the [gamma] rays without the need of measurement is prevented from entering a detector.

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