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Experimental results are presented on the pair production from high-energy photons (40–150 GeV) incident on a 0.5 mm Ge single crystal around the 〈110〉 axis. The observed enhancement increases from around 1 at threshold (40 GeV) to 7 at 1 50 GeV for photons aligned with the axis. Also the angilar dependence and the differential e+/e− spectra have been studied. For photons aligned with the axis, the results are in good agreement with calculations based on the constant field approximation.
|Glasgow Author(s) Enlighten ID:||Doyle, Professor Anthony|
|Authors:||Bak, J.F., Barberis, D., Brodbeck, T.J., Doyle, A.T., Ellison, R.J., Elsener, K., Hughes-Jones, R.E., Kolya, S.D., Mercer, D., Møller, S.P., Newton, D., Ottewell, P.J., Petersen, J.B.B., Siffert, P., Sørensen, A.H., Thompson, R.J., Uggerhøj, E., and Wilson, G.W.|
|College/School:||College of Science and Engineering > School of Physics and Astronomy|
|Journal Name:||Physics Letters B|
|Published Online:||28 October 2002|
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