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Table 2 The best-fit PAL spectra parameters and trapping modes for DRC Dipol® polymerized under control time intervals within unconstrained x3-term fitting

From: Light-Curing Volumetric Shrinkage in Dimethacrylate-Based Dental Composites by Nanoindentation and PAL Study

DRC

PAL spectra fitting parameters

Positron trap-modes

Ps-trap-modes

τ 1 , ns

τ 2 , ns

τ 3 , ns

I 2 , a.u.

I 3 , a.u.

τ av , ns

τ b , ns

κ d , ns-1

η, a.u.

R 3 , nm

F v , %

D5

0.171

0.434

1.851

0.52

0.091

0.459

0.262

2.03

0.345

0.270

1.39

D20

0.165

0.421

1.668

0.53

0.101

0.452

0.257

2.16

0.356

0.255

1.26

D60

0.155

0.411

1.625

0.56

0.101

0.444

0.251

2.45

0.374

0.248

1.17

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