"Bremsstrahlung radiation" is "braking radiation", but "acceleration" is being used here in the specific sense of the deflection of an electron from its course: Serway, Raymond A; et al. (2009). College Physics. Belmont, CA: Brooks Cole. p. 876. ISBN978-0-03-023798-0.
Chupp, E. L.; Forrest, D. J.; Higbie, P. R.; Suri, A. N.; Tsai, C.; Dunphy, P. P. (1973). "Solar Gamma Ray Lines observed during the Solar Activity of August 2 to August 11, 1972". Nature. 241 (5388): 333–335. Bibcode:1973Natur.241..333C. doi:10.1038/241333a0. S2CID4172523.
Chupp, E. L.; Forrest, D. J.; Higbie, P. R.; Suri, A. N.; Tsai, C.; Dunphy, P. P. (1973). "Solar Gamma Ray Lines observed during the Solar Activity of August 2 to August 11, 1972". Nature. 241 (5388): 333–335. Bibcode:1973Natur.241..333C. doi:10.1038/241333a0. S2CID4172523.
Chupp, E. L.; Forrest, D. J.; Higbie, P. R.; Suri, A. N.; Tsai, C.; Dunphy, P. P. (1973). "Solar Gamma Ray Lines observed during the Solar Activity of August 2 to August 11, 1972". Nature. 241 (5388): 333–335. Bibcode:1973Natur.241..333C. doi:10.1038/241333a0. S2CID4172523.