Description
The 707A supports applications such as radiopharmaceutical isotope impurity measurements and small-sample gamma spectroscopy, where samples are typically small and positioned close to the detector. The compact shield geometry reduces the total lead volume required, lowering overall shield weight while maintaining effective radiation shielding performance. This can simplify installation in laboratories where floor load requirements are an important consideration.
Typical Applications
- Radiopharmaceutical isotope impurity measurements
- Small-sample gamma spectroscopy in radiochemistry laboratories
- Low-level lab measurements in geology and oceanography
Designed for use with HPGe detectors measuring small sample geometries, the 707A lead shield reduces background radiation from external sources, helping lower background count rates, improve detection limits, and reduce measurement times.
The shield incorporates 10 cm (4 in.) thick low-background lead to provide effective attenuation of external radiation sources.
A graded liner consisting of 1 mm (0.040 in.) tin and 1.6 mm (0.062 in.) copper prevents interference from lead X-rays. The interior is coated with clear polyurethane to prevent oxidation and facilitate cleaning.
The shield floor includes a 12.1 cm (4.75 in.) diameter opening to accommodate Slimline cryostats or electrically refrigerated Flanged™ cryostats.
Lead Shielding for Small-Sample Gamma Spectroscopy
The 707A is purpose-built for small-sample gamma spectroscopy applications using high-purity germanium (HPGe) detectors. Its compact geometry, including a reduced internal cavity, lowers total shielding volume while maintaining effective attenuation of external radiation, supporting reliable and efficient measurement workflows.
While maintaining the same 4-inch lead thickness for effective shielding, the internal cavity dimensions are optimized for compact samples:
- Height: 10 in. (25 cm)
- Diameter: 6 in. (15 cm)
Flexible Configurations for HPGe Detector Systems
The 707A supports Slimline cryostats and Remote Detector Chamber (RDC) configurations for a range of measurement requirements. Optional accessories, including split annular lead plugs and tall tables, can be used to optimize shielding performance and reduce radiation streaming in low-level measurement applications.
