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Photon-induced positron annihilation lifetime spectroscopy using ultrashort laser-Compton-scattered gamma-ray pulses
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10.1063/1.4807701
/content/aip/journal/rsi/84/5/10.1063/1.4807701
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/5/10.1063/1.4807701

Figures

Image of FIG. 1.
FIG. 1.

Schematic illustration of PiPALS experiment using ultrashort LCS gamma-ray pulses.

Image of FIG. 2.
FIG. 2.

Typical waveforms of PMT output.

Image of FIG. 3.
FIG. 3.

Calculated energy spectra and measured energy spectrum. Dashed line shows the calculated energy spectrum of photons emitted from the lead target. Dashed curve shows the response of the BaF scintillator, which has an energy resolution of 15% (rms). Solid line shows the experimental data.

Image of FIG. 4.
FIG. 4.

Measured positron lifetime spectrum of the lead target. Solid curve is a least-squares fitting curve of data points derived from Eq. (7) . Positron lifetime for lead is evaluated as 194 ± 15 ps. Time resolution of the photon-induced positron annihilation lifetime spectrometer is evaluated as 88 ± 6 ps (rms). The count rate is 0.54 cps.

Image of FIG. 5.
FIG. 5.

Calculated time distribution until the annihilation gamma rays are absorbed in the BaF scintillator and until the scintillation light arrives at the faceplate of the PMT. σ is the time jitter caused by σ and σ, and σ is the time jitter caused by σ, σ, and σ.

Tables

Generic image for table
Table I.

Parameters of electron beam, Ti:Sa laser, and ultrashort LCS gamma-ray pulses.

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/content/aip/journal/rsi/84/5/10.1063/1.4807701
2013-05-30
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Photon-induced positron annihilation lifetime spectroscopy using ultrashort laser-Compton-scattered gamma-ray pulses
http://aip.metastore.ingenta.com/content/aip/journal/rsi/84/5/10.1063/1.4807701
10.1063/1.4807701
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