Pencil Beam Spectral Measurements of Ce, Ho, Yb, and Ba Powders for Potential Use in Medical Applications

Table 5

Summarized mean energy values for both exposure techniques.

Technique	Substance	kVp	Thickness; (m)	Mean energy range
				(keV)
				Low energy	High energy
Dual-kVp	CeO2	60	100–1000	35.05–37.65	—
	Ho2O3	70		—	48.16–51.92
		80	500–1500	—	49.12–52.10
		90		—	50.91–52.46
	Yb2O3	70		—	50.39–55.56
		80	500–1500	—	52.15–56.38
		90		—	53.87–56.89
Single-kVp	CeO2	80		37.72–39.12	68.39–73.27
		90	1000–2500	37.75–39.12	74.69–81.02
		100		37.75–39.13	80.74–88.36
	BaCl2(H2O)2	80		34.01–35.49	63.93–69.54
		90	1000–2500	34.05–35.51	68.82–70.06
		100		34.08–35.52	73.43–82.34