Table 5 Comparison of the measured signal between surface deposited (quoted by thickness) and implanted targets (quoted by implantation energy).

From: A comparative study of target fabrication strategies for microgram muonic atom spectroscopy

Target

Mass

(\({\upmu }\text {g}\))

2p–1s count

(\(10^{-6}\) muon−1)

\(\Lambda _{tot}\)

(\(10^{-3}\) muon−1)

\(\Lambda _{mass}\)

(\(10^{-4}\) muon−1 \({\upmu }\text {g}^{-1}\))

197Au \(10\,\text {nm}\)

34.11

8.8(5)

18.3(11)[23]

5.4(4)[7]

197Au \(3\,\text {nm}\)

10.23

4.5(4)

9.3(8)[12]

9.1(8)[12]

197Au \(90\,\text {keV}\)

10.38

4.7(3)

9.7(5)[7]

9.4(5)[12]

197Au \(27\,\text {keV}\)

9.38

4.3(3)

8.8(6)[11]

9.4(7)[12]

197Au \(4.5\,\text {keV}\)

9.45

5.2(5)

11.6(10)[15]

12.3(10)[13]

natCr \(25\,\text {nm}\)

31.77

37.8(17)

7.7(4)[10]

2.42(11)[30]

natCr \(4\,\text {nm}\)

5.08

10.0(6)

2.04(11)[26]

4.0(2)[5]

39K \(30\,\text {keV}\)

7.20 *

12.4(3)

2.20(6)[27]

3.05(8)[38]

 

\(4.16^{\dag }\)

12.4(3)

2.20(6)[27]

5.28(13)[64]

  1. The round brackets () represent the statistical error on the fit, while the square brackets [] represent the combined error of window transmission and detection efficiency. The targets with a quoted thickness are surface targets, while the one with quoted implantation energy are implanted targets. For the potassium, the mass near the surface (\(\dag\)) and the total mass (*) are given.
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